In addition, the scion requirements of filling and non pests, varieties of pure.
另外，接穗要求充实饱满、无病虫害、品种纯正。
A similar idea already exists in agriculture, where farmers use non-harvested 'trap crops' to lure insect pests.
当农夫用非收割的诱虫作物诱骗昆虫时，一个类似的方法已经用于农业。
Transgenic insect-resistance hybrid poplar 741 had negative effect on target and non-target phytophagous pests, but had positive effect on natural enemies and neutral arthropod.
研究表明，转基因741杨对目标昆虫和非目的植食性害虫存在负效应，而对天敌和中性节肢动物组成和发生无明显负作用。
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