HAU16008-08-2 - Pest Resistance Lecture 8 Wednesday...

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1 Pest Resistance Lecture 8 Wednesday,November 05, 2008 Resistance to Plant Pests: Natural Plant Encoded Pest Resistance Core Concepts : Introduction: The insect problem. Ubiquity and abundance of insects Chemical pesticides Cost and toxicity Secondary infestation Pesticide residue – ‘Silent spring’ Biological control Biopesticides Microbial pesticides Ubiquity and abundance of insects: Insects are earths most versatile organisms, ~51% of all species of living things are insects and ~78% of all species of animals are insects. Insects need C&N to survive and multiply, therefore, every living thing is potentially food and shelter for insects. However, in spite of the vast abundance of insects we still have plants and other living things. This reality indicates the presence of genetic mechanisms in the environment to control insect populations - a balance of power. Chemical vs Biological Control Plant based Insect Resistance Mechanisms Insecticidal Proteins
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