摘要
研究了大田笼罩条件下释放淡色斧瓢虫（Axinoscymnus cardilobus）对变叶木上烟粉虱种群的控制作用。每株释放1对淡色斧瓢虫对不同密度烟粉虱种群的控制效果差异显著。瓢虫和烟粉虱以1∶20比例释放对烟粉虱的防治效果较差,以1∶80比例释放对烟粉虱的防治效果不稳定、总体上看对烟粉虱的种群几乎没有控制效果;而以1∶40的比例释放的防治效果较好、较稳定,防效为35%～95%。释放不同数量的淡色斧瓢虫对同一密度烟粉虱种群的防治效果也差异显著。7周内在1∶40、3∶40、5∶40处理区,瓢虫对烟粉虱种群的防治效果分别为35%～95%、46%～90%和50%～98%。从经济学和生态学的角度综合考虑,瓢虫和烟粉虱以3∶40比例释放比较适宜。
The population control of Axinoscymnus cardilobus Pang and Ren （Coleoptera： Coccinellidae） to Bemisia tabaci （Genadius） （Homoptera： Aleyrodidae ） on Codiaeum variegatum L. was studied in cages under field condition. The control effects of B. tabaci differed significantly when a pair of adult of A. cardilobus was released against different population densities of B. tabaci. A. cardilobus did not give a satisfactory control to B. tabaci at releasing rate of 1 pair beetle： 20 pairs whitefly. Generally it was very difficult to control B. tabaci population when the beetle and whitefly were released at a ratio of 1：80. Effective control was observed with stable values at range of 35%- 95% when A. cardilobus and B. tabaci were released at the ratio of 1：40. Meanwhile, the control effect of B. tabaci was significantly different when different rates ofA. cardilobus were released against the same population density of B. tabaci. In case of 1：40, 3：40 and 5：40 ratios, the control effects of B. tabaci were recorded at ranges of 35% - 95% , 46% - 90% and 50% - 98% , respectively. Therefore, the most suitable ratio of predator/prey to consider when control B. tabaci was 3：40 according to the principle of economics and ecology.
出处
《生态学报》
CAS
CSCD
北大核心
2008年第7期3075-3081,共7页
Acta Ecologica Sinica
基金
国家“973”重大科技资助项目(2006CB102005)~~
关键词
淡色斧瓢虫
烟粉虱
种群控制
释放比例
Axinoscymnus cardilobus
Bemisia tabaci
population control
release rate
