weed biological control

基本解釋

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.
在雜草的生物防除中，研究和應用得最早且證明效果最好的措施是利用昆蟲防除雜草。
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.
針對果園雜草的生物學和生態(tài)學特性，通過生產實踐和試驗研究，結果初步表明；
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.
為了避免化學除草劑對水體的污染，生物防治已成為當前水葫蘆治理的重要方向。
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