截形叶螨在枣树上的消长规律及其防治研究

2009年7月6日至8月23日,在新疆阿克苏市利用定时定点调查方法对截形叶螨在枣树上的发生进行动态监测。监测发现,枣树与不同棉花品种间作的模式下,截形叶螨种群数量和动态规律有所不相同。枣树与陆地棉间作模式下,在调查期间截形叶螨种群数量有3个增长高峰,而在枣树与长绒棉间作模式下仅有2个高峰。此外,对截形叶螨采取了相应的药剂防治试验。结果表明,供试的药剂中1.2%苦烟乳油2000倍液、48%毒死蜱乳油2000倍液2种化学药剂防效最显著,其防效均达到了90%以上。其次为2.0%阿维菌素微乳剂4000倍液、10%三唑锡乳油2000倍液,其防效均达到80%以上,20%螨克乳油2000倍液的防治效果相对欠佳。在无公害药剂中,酒精合剂的防治效果较好,其次为牛尿合剂。

Study on Growth-decline and Control Efficacy of Tetranychus truncatus Ehara on Zizyphus jujube

The dynamic monitoring of the occurrence of Tetranychus truncatus Ehara on Zizyphus jujube were carried out by using the method of investigation at fixed time and location on July 6-Aug.23 2009.It was found from the results of monitoring that there were some differences between population number and dynamic law of Tetranychus truncatus Ehara when intercropping of Zizyphus jujube and different cotton varieties.When intercropping of Zizyphus jujube and upland cotton varieties,3 increasing peaks emerged from population number of Tetranychus trancatus Ehara,while 2 emerged in the long-fibre cotton during the process of investigation.In addition,the corresponding insecticide experiment for Tetranychus truncatus Ehara was conducted.The results demonstrated that the most significant control efficiency emerged from the two chemical insecticides such as 1.2% suffered smoke EC 2000 times,48% Chlorpyrifos EC 2000 times,whose control efficiency both reached more than 90% and followed by Abamection 2.0% 4000 times and 10% tin triazophos EC 2000 times,the control efficiency both reached more than 80%.While the effect of 20% dimethyl ether EC 2000 was unsatisfactory.Alcohol mixtrue in the non-polluted insecticides had better control efficiency and followed by cattle urine mixture.