Lec31_32_PlantPestsA_05D

Lec31_32_PlantPestsA_05D - Insects as Pests of Plants A V...

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Insects as Pests of Plants A V Take Home Messages All plants are susceptible to attack by insects (some plants more than others) Insects can attack different parts of plants and do so in a number of ways Humans often make pest problems worse on plants Global Issue: Insect damage to plants is a major economic factor everywhere and is a major factor in the poor nutrition that occurs in developing countries V How do Plants Grow? Most plants begin from seeds. Sometimes they grow from roots of older plants (e.g., aspen and oak) Roots Take up moisture and nutrients Stems Translocate water to leaves and food to fruits and growth tissue Leaves Take in light that generate food production and growth (photosynthesis); respiration Flower Pollinated (fertilized) -- produces seed Fruit Protects seeds and aids in dispersal H
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Plant Growth Within a Season 10 20 30 40 50 60 70 80 0 5 10 15 20 25 30 35 40 Plant Biomass Days After Planting Leaves and shoots Fruits/seeds
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This note was uploaded on 08/15/2011 for the course ENT 2004 taught by Professor Jrvoshell during the Spring '07 term at Virginia Tech.

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Lec31_32_PlantPestsA_05D - Insects as Pests of Plants A V...

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