摘要
以桑天牛成虫AprionagermariHope喜食的构树为引诱树 6株 ,选取一块与周围树林相对孤立的杨树林为试验地 ,试验地面积约为 0 13hm2 ,设引诱树 6株 ,胸径 8～ 10cm。每年 1次将 2g含 30 %印楝素的印楝种核提取物配成制剂 ,注入构树中 ,进行防治桑天牛林间试验。结果表明 :注药前 ,对照虫株率 (5 7 5 0 % )与处理虫株率 (5 6 4 1% )之间差异不显著。注药 1a后处理林的虫株率下降至 38 4 6 % ,对照林的虫株率增加到 70 0 0 % ;2a后 ,处理林的虫株率下降到 2 3 0 8% ,对照林的虫株率达 82 5 0 %。
Broussonetia papyrifera L. one of the hosts of Apriona germari Hope was chosen as trap trees.Six trap trees were planted in a relatively isolated poplar forest with an area of 0.13 hm 2.The breast diameters of the trap trees were between 8 and 10 cm.Two gram of the neem extract (preparation) containing 30% azadiractin was injected into each trap tree in April once a year.The (results) of the field tests showed that before the injection the attacking rates of control group and treated group were 57.50% and 56.41% respectively,which were not (significantly) (different).In the second year the attacking rate of the treated group dropped greatly to 38.46% while that of the control group remained 70.00%.In the third year,the former dropped to 23.08%,the latter rose to 82.50%.The perspectives and advantages of application of natural compounds against forest insect pests were (also) discussed.
出处
《中国森林病虫》
北大核心
2004年第1期27-29,共3页
Forest Pest and Disease
基金
国家自然科学基金资助项目 ( 3 0 170 776)
