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近 5年的观察研究表明 :鞭角华扁叶蜂幼虫平均食叶量为 3 6 4g/条 ;柏木鲜叶量 (W )与柏木胸径 (D)关系呈W =2 5 76 96 36 e0 12 954 9D。确定柏木失叶强度 18 3%为防治指标 ,胸径为 10、12和 14cm柏木的鞭角华扁叶蜂防治指标分别为 4 74、 6 14和 795头 /株。
In the past 5 years, the observation and study showed that the average leaf yield of the larvae was 3.64 g / L. The relationship between the fresh leaf mass (W) and the diameter of the cypress (D) was W = 2 5 76 96 36 e0 12 954 9D. Determine the cedar leaf degeneration strength of 18 3% for the prevention and treatment indicators, diameter at breast height 10,12 and 14cm cypress Bixia flaperonea were 4 74, 6 14 and 795 head / plant.