防治法：早春刮去老树皮，冬季毁灭向日葵、玉米遗株，喷洒高效低毒农药。

To the wind the prevention: early spring old bark, winter destroy sunflower, corn testament, spray pesticide plant high-efficiency.

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对策：公道用药，节制用药，研制高效低毒，低残留并有选择性的农药。

Countermeasures: fair use, temperance drug use, develop the risk-benefit ratio, low residue and selective pesticides.

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为筛选高效低毒的农药新品种，进行了20％康福多SL防治梨木虱的试验研究。

Field trials of two years demonstrated that 20% confidor SL was effective to control pear planthoppers.

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