Until 1977, only 13 Bt subspecies had been described ; all were toxic to lepidopteran larvae only.
1977年以前只发现13个亚种,而且这些 亚种 都只对鳞翅目害虫有效.
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Numbers of individual and species of Lepidoptera in Pb 29 were obviously decreased.
在高抗Pb29节肢动物群落内鳞翅目害虫的数量和种类都明显下降.
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Abstact: the investigation, there were more than 60 categories of mulberry pests in Hunan province.
经调查研究, 湖南省桑树害虫有60多种.
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Diomea cremata Butler , a noctuid insect pest of mushroom, was newly found in Fujian Province.
本文报道的星狄夜蛾DiomeacremataButler是福建省食用菌害虫的新记录.
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这种寄生蜂是农民的好帮手, 它可以抑制农业害虫的繁殖.
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Even plants can run a fever, especially when they're under attack by insects or disease.
植物也会发烧, 特别是当它们受到害虫攻击或生病的时候.
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You could see the poor plant weakening day by day as the insects spread through rhizome.
害虫已经蔓延到根茎,你可以感觉到这可怜的植物一一天天地衰弱下去.
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Pests have natural enemies eagles, owls, yellow you, woodpeckers, swallows and so on.
害虫天敌有鹰 、 猫头鹰 、 黄鼬 、 啄木鸟 、 燕子等.
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西花 蓟 马是一种世界性害虫,我国大陆2003年首次在北京发现报道.
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Many high-yielding crops have been found to be particularly susceptible to insects and pathogens.
人们发现许多高产作物对害虫和病原菌特别敏感.
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In China, pyrethroid insecticides were forbidden to apply in rice field.
但是,在中国一直被禁止应用于水田害虫防治.
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