character: Biological Control Agents
topic: Use of Biological Control Agents as Insecticides
grade: 9
subject: Biology
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character: Ladybugs
topic: Natural Predators of Aphids
grade: 9
subject: Biology
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character: Bacillus thuringiensis
topic: Bacterial Insecticide for Caterpillars
grade: 9
subject: Biology
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character: Nematodes
topic: Soil-dwelling Roundworms as Biological Control
grade: 9
subject: Biology
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