effect and adverse effect
Effect size effect magnitude
reducing toxic effect and enhancing therapeutic effect
skin effect and proximity effect
Comprehensive infestation index
economic infestation level
grasshopper infestation
infestation
感染
侵害
为害
传染
侵扰
危害
感
污染
防治
危害调查
蔓延
发生
致害性
叮刺
[虫类]群袭
群袭
大批出没
叮咬
infestation characteristics