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我市山区核桃栽培面积近万亩,约20万株左右。近年由于云斑天牛危害造成大量死株,现存株数明显减少。为使我市山区核桃生产不断发展,提高现存植株产量,我们对云斑天牛发生规律进行了调查,并总结了南山大队的防治经验。
Mountain walnut cultivation area of nearly 10,000 acres, about 200,000 or so. In recent years, due to a large number of dead Haemonchus caused dead, the existing number of significantly reduced. In order to make the continuous development of walnut production in mountainous area of our city and increase the existing plant yield, we investigated the regularity of occurrence of cloudy spotted bull and summarized the prevention and control experience of Nanshan Brigade.