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Lec31_32_PlantPestsB_05D

Lec31_32_PlantPestsB_05D - Insects as Pests of Plants B V...

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Insects as Pests of Plants B V Types of Insect Injury to Plants Borers: Bore into stem. Weakens plant structurally, inhibits or eliminates transport of water and nutrients. H Stem borer damage on millet in Mali Types of Insect Injury to Plants Borers: Found in trees (large stems) as well as small plants. Poplar borer Larva Adult Larval gallery Photo: Univ. of Georgia V
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Types of Insect Injury to Plants Bark beetles and engravers : Feed on phloem just beneath bark; affect the flow of nutrients, allows (requires) fungi to enter plant. Southern pine engraver Six-spined engraver Photos: Univ. of Georgia Southern pine beetle H Types of Insect Injury to Plants Photosynthate sappers: Feed on plant sap-- usually phloem. Phloem contains the sugars produced by photosynthesis, and many insects, such as aphids, can remove them. Cicada Phloem Xylem V Types of Insect Injury to Plants Fruit/seed feeders: Reduce yield by feeding directly on fruit/seed Major problem if we want the fruit/seed (e.g.; corn earworm on ears of corn)
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