摘要
为了保护祁连山生态环境和实现青海云杉黄卷蛾绿色防治,观察了其生活习性,调查了发生地环境因子,并开展了不同药剂防治筛选试验.结果显示:在祁连山林区青海云杉黄卷蛾1年发生1代,发生受青海云杉分布地海拔和郁闭度影响,海拔2500～2800m和郁闭度0.6以下林区发生较严重.使用苦参碱、印楝素、苏云金杆菌和多杀霉素防治后,均显著降低了虫口密度、林木受害率和死亡率,不同药剂中0.3％印楝素乳油的虫口密度、林木受害率和死亡率最低,综合防治效果最佳,2.5％苦参碱次之.
Abstract
In order to protect the ecological environment of Qilian Mountain and realize green control of Arc hips crassifolianus on Picea crassifolia Kom.,we observed the life habit,investigated the environmental factors of occurrence place,and did the control experiment of different pesticide.The result showed that the Archips crassifolianus were one generation one year,the altitude and crown density of Picea crassifolia Kom.affected the occurrence,the occurrence of altitude 2500～2800 m and crown density under 0.6 was the more serious.After we used the matrine,azadirachtin,bacillus thuringiensis,spinosad to control Archips crassifolianus,it decreased the pest density,forest damage rate,and mortality rate,the differences were extremely significant(P＜0.01)compare to,the pest density,forest damage rate,and mortality rate of 0.3％azadirachtin were the lowest in all pesticides,whose comprehensive control effect was the best,the comprehensive control effect of 2.5％matrine was second.
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