ven118lec1 - VEN 118, Grape Pests, Diseases and Disorders...

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VEN 118, Grape Pests, Diseases and Disorders Introduction to grapevine diseases and its pests
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Dr. Larry E. Williams Dept. Viticulture & Enology University of California – Davis and Kearney Agricultural Center 9240 S. Riverbend Ave. Parlier, CA 93648 e-mail – [email protected]
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VEN 118, Grape Pests, Diseases and Disorders Introduction to grapevine diseases and its pests
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Recommended Texts • Grape Pest Management Manual • Compendium of Grape Diseases
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Printing Slides from Power Point • Print What – Handouts • Color – Grayscale • Slides per page – I usually use 6 • To conserve paper you could delete any slides (which you feel may not be important) prior to printing
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Further Information from IPM Website Go to: www.ipm.ucdavis.edu HOW TO MANAGE PESTS Pests of agricultural crops, etc. Grape
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Insect, Spider and other Pests of Grape to be Covered Leaf pests: a.) Grape leafhopper ( Erythoneura elegantula) b.) Variegated leafhopper ( Erythoneura variablis) c.) Sharpshooter leafhoppers (vector of PD) d.) Western grapeleaf skeletonizer e.) Grape leaffolder f.) Spider mites: Pacific Willamette
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Insect, Spider and other Pests of Grape to be Covered Fruit pests: a.) Omnivorous leafroller b.) Orange Tortrix c.) Mealybug d.) Thrips Bud or new growing shoot tip pests: a.) Cutworms b.) Grape bud beetles
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Insect, Spider and other Pests of Grape to be Covered Vegetation management and Weed pests: a.) Perennial b.) Annual c.) Biannual Vertebrate pests: Deer, birds, rabbits, voles, and gophers among others
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Simplified Life Cycle of Insects Egg Nymph Adult Larvae Pupa (Feeding stage) (Feeding stage) (Winged & Reproductive) Within the feeding portion of the life cycle there are specific steps in the growth of the insect called ‘ instars ’. The exoskeleton is shed and growth continues.
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Seasonal population dynamics of Insects Brood = All individuals that hatch at about the same time from eggs laid by one series of parents and normally mature about the same time Generation = From any given stage in life cycle to the same stage in the offspring • Insects are poikilotherms = cold blooded • Life cycle length depends on temperature • The number of broods or generations at a given location will differ due to the temperature at that location
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Insect, Spider and other Pests of Grape Covered Root pests: a.) Phylloxera - Daktulosphaira vitifoliae b.) Nematodes - Dagger ( Xiphinema index ) - Root knot ( Meloidogyne spp ) - Citrus ( Tylenchulus spp ) - Root lesion ( Pratylenchus spp .)
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Disease A continuous dysfunction caused by both biotic and abiotic agents. Causal agents
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This note was uploaded on 09/29/2010 for the course VEN 81437 taught by Professor Larrywilliams during the Fall '10 term at UC Davis.

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ven118lec1 - VEN 118, Grape Pests, Diseases and Disorders...

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