It's possible the insect-eating martins helped to control pests living around Native American camps.

答案可能是这些紫燕捕食昆虫，帮助了美洲土著居民控制营地周围的昆虫数量。

In this case, the next step would be to use a pest control called insecticidal soap.

在这种情况下，下一步就要使用一种叫做杀虫肥皂的害虫控制方法。

This finding provides a new method to control the pest, according to a Science and Technology Daily report published Thursday.

根据周四发表的《科技日报》报道，这一发现提供了一种防治这种害虫的新方法。

In addition to controlling pests naturally, there is another upside to the program.

除了自然控制害虫外，该计划还有另一个好处。

They help pollinate plants, provide food for other animals, and help control pest populations.

它们帮助植物授粉, 为其他动物提供食物, 并帮助控制害虫种群。

Ooh I've been a lot of jobs I've been a welder, I've been a pest control, and a beekeeper.

哦，我做过很多工作， 我做过焊工，我做过害虫防治和养蜂人。

The plant is native to India and Burma, where it has been used for centuries to control pests and to promote health.

该植物原产于印度和缅甸，几个世纪以来一直被用来控制害虫和促进健康。

As our demand for more, safer produce increased, so did the need for effective chemicals that could control pests on a grander scale.

随着我们对更多、更安全的产品的需求增加，对能够在更大范围内控制害虫的有效化学品的需求也在增加。