Vegetables: Home Insects 2-7
Eric R. Day, Extension Entomologist, Virginia Tech
Insects
Table 2.5 - Insecticides
Crop Asparagus Insect Asparagus beetle, Grasshopper Aphid Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust. Malathion 57% EC, 1.0 tbsp or Esfenvalerate, 2.0 tsp Thiodan1 1-day wait. Treat spears during harvest. Do not repeat a carbaryl (Sevin) application within 3 days. Treat when first seen. esfenvalerate : 3-day wait. Malathion : 3-day wait. Thiodan : 3-day wait. Do not exceed 7 applications. Treat when damage is first observed. carbaryl (Sevin) : 3-day wait. esfenvalerate : 3-day wait. Treat when damage appears. See label for carbaryl (Sevin) esfenvalerate : 3-day wait. See label for carbaryl (Sevin) esfenvalerate : 3-day wait. Treat when first pods are 1 inch long and weekly or as needed thereafter. esfenvalerate : 3-day wait. carbaryl (Sevin) : 0-day wait. Treat when damage appears.
Beans (snaps and limas)
Thrips Mexican bean beetle
Insecticidal soap or Esfenvalerate Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust OR Esfenvalerate Carbaryl (Sevin) or Esfenvalerate Esfenvalerate OR Sevin 5% dust Esfenvalerate OR Carbaryl (Sevin) 50% WP, 3.0 tbsp OR 5% dust. insecticidal soap
Grasshopper Stinkbug Corn earworm
Spider Mite
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
2-8 Home Vegetables: Insects
Table 2.5 - Insecticides (cont.)
Crop Beets Insect Flea beetle Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust. Bacillus thuringiensis (Bt), 2.0-3.0 tbsp (Bactur, Dipel, SOK-BT, Thuricide). Esfenvalerate Permethrin Treat when insects appear in damaging numbers. Repeat as needed. carbaryl (Sevin) : 0-day wait. (Bt) : 0-day wait. May be applied as a bait. Follow directions on label. Treat every 4 days after first true leaves appear until harvest if worms are present. esfenvalerate : 3-day wait. permethrin : See label. Treat when insects appear in damaging numbers. Cauliflower 5 days, cabbage 7 days, broccoli 5 days for Diazinon. See label for carbaryl (Sevin). esfenvalerate : 3-day wait.
Cabbage (broccoli, cauliflower, brussels sprouts, cabbage)
Caterpillars2 looper, imported cabbageworm, and diamondback moth larvae
Aphid (plant lice), flea beetle
Permethrin (not for brussels sprouts), OR Carbaryl (Sevin). Esfenvalerate
Cabbage root maggot Flea beetle
See text about maggots and soil Insects. Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust, Permethrin Esfenvalerate Cyfluthrin, Thiodan insecticidal soap carbaryl (Sevin) : 3 day wait. Repeat treatment at 7- to 14-day intervals as needed. permethrin : See label. esfenvalerate : 3-day wait. Thiodan : 7-day wait, do not exceed 2 applications. soap : 0-day wait. cyfluthrin : 0-day wait.
Carrots
Aphid
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
Home Vegetables: Insects 2-9
Table 2.5 - Insecticides (cont.)
Crop Cucurbits (cantaloupes, cucumbers, squash, pumpkins, and watermelons)
3
Insect Cucumber beetle
Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 1.0 tbsp OR 5% dust. Permethrin 25% EC, Thiodan. Esfenvalerate Treat when seedlings emerge from soil if damage appears. Repeat at 5-day intervals as needed. Make application in late afternoon. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. Carbaryl (Sevin) may kill bees when applied between 10 a.m. and 2 p.m. To avoid injury to tender foliage, do not apply when rain or humidity is expected during the next 2 days. Repeat as needed. See label for carbaryl (Sevin). permethrin : 3-day wait. Thiodan : 0-day wait. Treat when damage appears. Treat when seedlings emerge. carbaryl (Sevin) : See label. permethrin : 3-day wait. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. Treat when vines begin to run, apply to bases of plants four times at 7-day intervals. Honeybees are necessary for good fruit set. Insecticides are toxic to bees. Apply in evening when fewer bees are working. Treat flower buds, stems, and vines weekly. permethrin : 3-day wait. Thiodan : 0-day wait. esfenvalerate - 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon.
Squash bug Pickleworm
Carbaryl (Sevin) 50% WP, 1.0 tbsp OR 5% dust. Esfenvalerate
Squash vine borer
Permethrin 25% EC OR 2.0-3.0 tbsp Thiodan. Esfenvalerate
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
2-10 Home Vegetables: Insects
Table 2.5 - Insecticides (cont.)
Crop
3
Insect
Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Permethrin 25% EC, Thiodan, Esfenvalerate Treat when seedlings emerge. CARBARYL (SEVIN) WILL NOT CONTROL APHIDS. Treat when insects appear in damaging numbers. Repeat as needed. permethrin : 3-day wait. Thiodan : 0-day wait. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. Treat when damage appears. Kelthane : 2-day wait. Repeat as needed. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. Treat when damage appears. permethrin : 3-day wait, repeat as needed. Pick and destroy infested leaves. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. esfenvalerate : 3-day wait. Esfenvalerate is not labeled for cantaloupe or watermelon. carbaryl (Sevin) : 0-day wait. Treat when damage appears. Repeat as needed. Thiodan : 1-day wait. Do not exceed 0.5 lb of active ingredient/A. esfenvalerate : 7-day wait. Bacillus thuringiensis : 0-day wait.. Treat every 4 days after first true leaves appear until harvest, if worms are present. Esfenvalerate not labeled for turnips, kale, or spinach.
Cucurbits Aphid (plant lice) (cantaloupes, cucumbers, squash, pumpkins, and watermelons) (cont.)
Spider mite
Insecticidal soap,
Leafhopper, leafminer
Permethrin 25% EC. Esfenvalerate
Whitefly Eggplant Flea beetle, Colorado potato beetle, grasshopper
See text about Whiteflies. Esfenvalerate Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust. Thiodan Esfenvalerate
Greens or Leaf Crops (turnips, kale, spinach, collards)
1
Caterpillars2 looper, imported cabbageworm, and diamondback larva
Bacillus thuringiensis, for spinach and turnips. Esfenvalerate
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
Home Vegetables: Insects 2-11
Table 2.5 - Insecticides (cont.)
Crop Insect Flea beetle, Harlequin bug Greens or Leaf Grasshopper Crops (turnips, kale, spinach, collards) (cont.) Aphid (plant lice) Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 2.0 tbsp. Esfenvalerate Carbaryl (Sevin), Esfenvalerate carbaryl (Sevin) : 14-day wait. esfenvalerate : 7-day wait. Esfenvalerate not labeled for turnips, kale, or spinach. Treat when insects appear in damaging numbers. Repeat as needed. See label for carbaryl (Sevin). esfenvalerate : 7-day wait. Esfenvalerate not labeled for turnips, kale, or spinach.
Rotenone 1% dust. Insecticidal See label for Rotenone. Treat when insects soap, Esfenvalerate appear in damaging numbers. esfenvalerate : 7-day wait. Esfenvalerate not labeled for turnips, kale, or spinach. Insecticidal soap : Use up to the day before harvest. Permethrin OR insecticidal soap, OR Malathion 4% dust OR 57% EC, 1.0 tsp. Treat when insects appear in damaging numbers. Malathion : 14-day wait for leaf lettuce, 7-day wait for head lettuce. permethrin : 1-day wait. soap : 0-day wait. carbaryl (Sevin) : 3-day wait for head lettuce, 14-day wait for leaf lettuce. permethrin : 1-day wait. See label. Only certain specific brands have mushrooms on the label. Make sure the brand you use is registered for mushrooms. See label. Treat when insects appear in damaging numbers. Malathion : Three days green onion. 1.0 tbsp For onion, treat when thrips appear in damaging numbers.
Lettuce
Aphid (plant lice)
Flea beetle, harlequin bug, stink bug Mushroom Gnat, rove beetle
Carbaryl (Sevin) 5% dust Permethrin Pyrethrins, Malathion
Okra Onion
Aphid (plant lice) Thrips, Aphid
Rotenone 1% dust Malathion 4% dust OR 57% EC, Insecticidal soap
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
2-12 Home Vegetables: Insects
Table 2.5 - Insecticides (cont.)
Crop Insect Onion Maggot Pea Aphid (plant lice) Insecticidal soap. Esfenvalerate Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Maggot control, see section on wireworms and maggots under soil insect control. Treat when insects appear in damaging numbers. esfenvalerate : 3-day wait. Insecticidal soap : Use up to the day before harvest. Treat for cowpea curculio when pods begin to form. esfenvalerate : 3-day wait. carbaryl (Sevin) : 0-day wait. Use at 4- to 5-day intervals as long as needed. Treat when insects appear in damaging numbers. esfenvalerate : 7-day wait. cyfluthrin : 7-day wait. Try planting potatoes as far from last years crop as possible. Short-season varieties such as Superior can withstand late-season damage. Hand picking will work as a last resort. Sevin: 0-day wait Thiodan: see label Bt: 0-day wait Bacillus thuringiensis var. tenebrionis is sold under the trade names: M-Trak, Foil and Novodor
Earworm, cowpea curculio, grasshopper Pepper (bell or hot) European corn borer, grasshopper Aphid (plant lice)
Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust OR Esfenvalerate Carbaryl (Sevin) 50% WP, 1.0 tbsp OR 5% dust Esfenvalerate Cyfluthrin
Potato
Colorado potato beetle, Thiodan (Thiogard) Carbaryl (Sevin) Bacillus thuringiensis var. tenebrionis
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
Home Vegetables: Insects 2-13
Table 2.5 - Insecticides (cont.)
Crop Insect European corn borer Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Last Between as Indicated Otherwise Application and Harvest Carbaryl (Sevin) Thiodan (Thiogard) Bacillus thuringiensis To control ECB, make 3 applications at 7-day intervals, starting in mid-May. Treat when insect and/or damage first appear. Sevin: 0-day wait Thiodan: see label Bt: 0-day wait Treat when insect and/or damage first appears. Sevin: 0-day wait Purchase pest-free plants. Treat when insect and/or damage first appears. Thiodan: see label Treat in mid-June or when insects and/or damage first appear. Sevin: 0-day wait Thiodan: see label Treat when insect and/or damage first appear. Sevin: 0-day wait Thiodan: see label Keep potatoes hilled properly to avoid infestation and store potatoes at a temperature below 50F. If insecticide is needed, treat 10 days before harvest. Treat when damage appears. Damage usually occurs in hot, dry seasons, and it may be severe. Four days. Do not reapply within 15 days or more than twice within a 35- day period when fruit is present. Malathion : 3-day wait. Treat when damage appears or insects appear in damaging numbers.
Potato (cont.)
Grasshopper Whitefly
Carbaryl (Sevin) (Thiogard) Thiodan (Thiogard)
Potato leafhopper
Carbaryl (Sevin) Thiodan (Thiogard)
Aphids
Insecticidal soap Malathion Thiodan (Thiogard) Thiodan (Thiogard) Esfenvalerate
Potato tuberworm
Strawberry
Spider mite
Insecticidal soap
Cyclamen mite
Thiogard 3, 1.67 tbsp1
Leafroller, root lice (root aphid)
1
Malathion 5% dust OR 57% EC, 2 tsp
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
2-14 Home Vegetables: Insects
Table 2.5 - Insecticides (cont.)
Crop Insect Aphid (plant lice) Strawberry (cont.) Strawberry weevil Clipper and Strawberry rootworms Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Insecticidal soap Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5 % dust Malathion 5% dust OR 57% EC, 1.0 tbsp Treat when insects appear in damaging numbers. carbaryl (Sevin) : 1-day wait. Malathion : 3-day wait. Start treatment when cut buds or leaf holes are seen. This is usually just after beginning of bloom (late March or early April). Treat at weekly intervals as needed. Rotate strawberries to a part of the garden that has not had strawberries in the last year. carbaryl (Sevin) : 0-day wait. Treat when insects and damage appear on young plants. Application of carbaryl (Sevin) to the tassel region of corn during the pollen shedding period will seriously reduce the bee population. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. permethrin : 1-day wait. Treat when window pane feeding damage appears on leaves of young corn or in whorls of older corn. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. permethrin : 1-day wait. Treat when 50% of plants show tiny pin holes in leaves. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. permethrin : 1-day wait.
Sweet Corn4
Flea beetle, grasshoppers
Carbaryl (Sevin) 50% WP, 2.0 tbsp Cyfluthrin Esfenvalerate Permethrin
Fall armyworm
Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust Cyfluthrin Esfenvalerate Permethrin
European corn borer
Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust Cyfluthrin Esfenvalerate Permethrin
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
Home Vegetables: Insects 2-15
Table 2.5 - Insecticides (cont.)
Crop Insect Corn sap beetle, European corn borer in the ear, corn earworm, Japanese beetle Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust Thiodan Cyfluthrin Esfenvalerate Permethrin Apply to silks every other day begin- ning at 10% silking and continuing until 90% of silks have wilted and turned brown. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. permethrin : 1-day wait. Carbaryl (Sevin) : 1-day wait. Apply at 2- to 3-day intervals when silking. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. permethrin : 1-day wait. For fields with a history of seedcorn maggot problems or when a cool, wet spring is expected. carbaryl (Sevin) : 0-day wait. Thiodan : 1-day wait. Treat when damage appears or when insects appear in damaging numbers. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. Thiodan : 1-day wait. Treat when damage appears or when insects appear in damaging numbers. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait. Thiodan : 1-day wait. Repeat as needed. Follow directions on label. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait.
Sweet Corn4 (cont.)
Corn earworm
Carbaryl (Sevin) Cyfluthrin, Esfenvalerate, Permethrin
Seedcorn maggot
Soil insecticide labeled for vegetables Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust Thiodan Cyfluthrin, Esfenvalerate
Tomatoes4
Flea beetle, stink bugs, grasshoppers, leaffooted bugs
Colorado potato beetle
Thiodan Cyfluthrin, Esfenvalerate
Blister beetles, hornworm, tomato russet mite, cabbage looper
1
Carbaryl (Sevin) Thiodan, Cyfluthrin, Esfenvalerate
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
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Dusts should always be applied as a fog to cover leaf surfaces with a very light but visible film of insecticide. A hand-operated crank duster is in most cases the only hand equipment that is really acceptable for applying dusts. However, a puff duster is adequate for small plants such as young cucumbers and for treating silking ears of corn. Sprays should be applied to the point of runoff. An effort should be made to spray undersides of leaves, especially for effective spider mite, aphid, and whitefly control. Wettable powders are omitted in some cases to conserve space. They are generally as effective at comparable rates, but usually require more agitation. Read labels for amount per gallon of water.
HOME GROUNDS & ANIMALS 2009
2-16 Home Vegetables: Insects
Table 2.5 - Insecticides (cont.)
Crop Insect Fruitworm Treatment and Amount to Mix with 1 Gallon of Water or Remarks and Days Between Last as Indicated Otherwise Application and Harvest Carbaryl (Sevin) 50% WP, 2.0 tbsp OR 5% dust. Cyfluthrin, Esfenvalerate carbaryl (Sevin) : 0-day wait. Treat every 5- to 7-days when fruit begins to set. Continue as long as fruit is present if needed. cyfluthrin : 0-day wait. esfenvalerate : 1-day wait.
Tomatoes4 (cont.)
Thrips, Aphids
Insecticidal soap OR Malathion Malathion : 1-day wait. Treat when insects 5% dust OR 57% EC, 1.0 tbsp. appear in damaging numbers. Esfenvalerate, Cyfluthrin esfenvalerate : 1-day wait. cyfluthrin : 0-day wait. Insecticidal soap See text about Cutworms and Wireworms and soil insects. Esfenvalerate esfenvalerate : 1-day wait. Treat when mites appear in damaging numbers.
Spider mites Cutworms Whiteflies
1
Three percent Thiogard is a low-concentrate formulation of Thiodan for homeowner and home garden use. It may be available under other trade names. Loopers are hard to kill. Bacillus thuringiensis (B.t.) will work well but is not fast. B.t. is safe. Loopers and other worms get sick the first day and die later. Loopers become a problem in Virginia in late July or early August. They will remain a problem until a killing frost or light freeze occurs. Special note for all cucurbits: Row covers, in place from seedling stage until plants push out from the underside, will provide control for many of the pests including Cucumber beetles and Squash vine borer. Row covers are either fine mesh or loose spun fiber cloth that lets air, sun, and rain in, but excludes pests. Keeping seedbeds free of vegetation for 3 weeks prior to planting time will aid in control of cutworms. For more details on cutworm control see text about soil insects and cutworms-wireworms. The three formulations of Diazinon are now sold for home and garden use under the Spectracide label, the Ortho label, and several others. For this reason we urge home gardeners to read the label and act accordingly.
2
3
4
Dusts should always be applied as a fog to cover leaf surfaces with a v...