The population of the spruce budworm, the warbler's favorite prey in North America, has been dropping.

北美莺最喜欢的猎物云杉芽虫的数量一直在下降。

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Scientists have now investigated the effects of the spraying of Matacil, one of the anti-budworm agents that is least toxic to insect-pollinators.

科学家们现在已经研究了喷洒灭害威的效果，灭害威是一种抗虫剂，对传粉昆虫的毒性最小。

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Is tomato plant the host of the oriental tobacco budworm, Helicoverpa assulta (Guenée)?

番茄是烟青虫的寄主植物吗?。

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