摘要
在北京巨山农场果园中，分别在６月初和６月中旬，刈割苹果树行间的紫花苜蓿并将其放在树冠下后，东亚小花蝽既向割草区周围的紫花苜蓿上扩散，也向割草区苹果树上迁移。割草后３天，割草区周围紫花苜蓿上小花蝽数量增加２０％～１１９％，其增加量随距割草区距离的增加而减少，割草区苹果树冠上小花蝽数量比割草前增加２～３倍，蝽螨比可提高１４倍，树冠小花蝽增加的数量受小花蝽扩散能力和割草时间的影响。试验结果表明，适时刈割苹果园中的紫花苜蓿。
Results from observations conducted in an apple orchard with alfalfa as cover crop at the west suburb of Beijing showed that after the alfalfa was cut and piled up around the tree trunk, Orius sauteri was found to disperse both to the surrounding alfalfa and up to the apple trees, the ratio of dispersal was 20% to 119% in surrounding alfalfa and 2 to 3 times in appl e trees, respectively. Thus, the index of natural enemy/pest mites was increas ed 14 times. The number of O. sauteri in apple tree was affected by the beh aviour of O. sauteri and cutting time. The results showed that Orius sauteri might play a better role to control pest mites by cutting the a lfalfa at the right time.
出处
《中国生物防治》
CSCD
1995年第1期1-4,共4页
Chinese Journal of Biological Control
基金
国家"八五"攻关
博士点基金
关键词
生草法
东亚小花蝽
蚜虫
叶螨
操纵技术
cover crop apple orchard Orius sauteri pest mites manipulation
