In the biological control of weeds, the measure which was first studied and applied, and which has also been proved effective is weed-control by insects.
在杂草的生物防除中，研究和应用得最早且证明效果最好的措施是利用昆虫防除杂草。
The method of removing these weeds by virtue of biological control and the present problem of application in practice were discussed on emphases.
重点讨论了生物防治的方法及实际运用当中存在的问题。
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