植物害虫（plant，insect pest of）主要指为害农作物及其产品的昆虫和螨类等。种类多、分布广、繁殖快、数量大，除直接造成农作物及其产品的严重损失外，还是传播植物病害的媒介。昆虫属节肢动物昆虫纲。
园艺植物害虫防治 plant pest control
植物-害虫取食复合体 plant-host feeding complex
植物病虫害 plant pest ; crop pest ; plant diseases and pests
园林植物病虫害防治 Garden plant pests
农民没有化学药剂就消灭不了植物害虫。
蚜虫属于同翅目蚜总科，是一类重要的园林植物害虫。
Aphids belong to Homoptera Aphidoidea, Which are one kind of the most important garden plant pests.
目的是为了让农民精确地确定喷洒杀虫剂的地方而无需把整块地都撒上药，因为那样做毫无疑问要殃及没染上害虫的植物。
The goal was to let farmers precisely target pesticide spraying rather than rain poison on a whole field, which invariably includes plants that don't have pest problems.
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