橄榄星室木虱的种群动态及药剂防治

The population dynamics and chemical control of Pseudophacopteron canarium

橄榄星室木虱在福建省莆田地区 1年发生 8代 ,世代重叠 ,以成虫越冬 ,1年中有 6个发生高峰期 ,以橄榄秋梢期为全年雌成虫产卵、若虫发生最高峰 ,夏梢期是成虫羽化全年最高峰。田间药效试验结果表明 ,1 5种杀虫剂对橄榄星室木虱都有较好的防效 ,持效期可长达 7d以上 ,药后 7d的防效都在90 %以上 ,但速效性差异较大。其中 ,以 1 %威宝乳油 2 0 0 0倍、2 5 %功夫菊酯乳油 2 0 0 0倍、2 5 %功夫菊酯 +1 0 %吡虫啉 ( 1 2 5∶1 ) 2 0 0 0倍和 2 5 %功夫菊酯 +1 0 %吡虫啉 ( 1∶2 ) 2 0 0 0倍对橄榄星室木虱效果最好 ,速效性好 ,药后 1d的防效均达 91 5 8%以上。

Pseudophacopteron canarium Yang & Li has 8 generations per year, and overwinters as adult in Putian, Fujian Province. Generations overlap there with six peaks of occurrences in a year. The egg and nymph numbers reach the highest peak at the autumn-shoot stage, whereas the eclosion reached its highest peak at the summer-shoot stage. Field trial result showed that 15 pesticides were proved to be effective in controlling P. canarium,with the control effect lasting for more than 7 days and even still remaining above 90% at 7 days after application. However, these pesticides were significantly different in their quick-acting. 1% abamectin+beta-cypermethrin EC diluted with 2000 times, 2.5% lambda-cyhalothrin EC with 2000 times, the mixture of 2.5% lambda-cyhalothrin and 10% imidacloprin (12.5:1) with 2000 times and the mixture of 2.5% lambda-cyhalothrin and 10% imidacloprin (1:2) with 2000 times were examined to be the best in both control effect and quick-acting with their control effects above 91.58% 1 day after application.