Pest Control
Strategies for reducing crop pest populations: chemical (pesticides), biological (natural enemies), cultural (agronomic practices), and integrated approaches.
Real World
In California's Central Valley, farmers use parasitic wasps (Aphytis melinus) to control red scale insects on citrus crops, reducing insecticide sprays by over 50% compared to the 1970s chemical-only approach.
Exam Focus
When 'evaluate' pest control methods, always contrast effectiveness against environmental cost — mark schemes reward both sides.
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