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(yīng)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(xué)和生態(tài)學(xué)特性，通過生產(chǎn)實踐和試驗研究，結(jié)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(xué)除草劑對水體的污染，生物防治已成為當(dāng)前水葫蘆治理的重要方向。
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