weed biological control

常见例句

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。
Practice and experiment, in fields have been conducted to study the better weed control strategy according to the biological and ecological eharaet- ors of weed in orchard.
针对果园杂草的生物学和生态学特性，通过生产实践和试验研究，结果初步表明；
In order to protect the public water system from chemical herbicides pollution, biological method has been suggested to control the growth and the reproduction of this weed.
为了避免化学除草剂对水体的污染，生物防治已成为当前水葫芦治理的重要方向。
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