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梨绿吉丁俗称“缠腰折”,在河北省中南部发生相当广泛,部份梨园严重受害,据1962年在晋县河头村调查被害株率达94.8％,1965年束鹿县李同智庄大队,大树被害率68％、中树61.5％、小树23.1％,造成树势衰弱,甚至全树枯死。 1、生物学特性 为害部位:梨绿吉丁(学名待定)以老熟幼虫越冬,主要在主枝权部以下,占越冬总虫量的57.5—80.3％,是防治的重点部位。
Pear Green Jitin commonly known as “wrapped around the waist,” occurred in central and southern Hebei Province, a considerable part of the serious damage to some pear Park, according to the survey in 1962 in the village of Hepatitis in Jinxian rate of 94.8%, 1965 Shulu County with Tongzhi Zhuang Brigade, trees killed 68%, 61.5% of trees, 23.1% of small trees, resulting in frail trees, and even dead trees. 1, the biological characteristics of harmful parts: pear green Jidin (scientific name to be determined) overwinter with mature larvae, mainly in the main branches below, accounting for 57.5-80.3% of the total amount of overwintering insect, is the focus of prevention and treatment.