秦椒田天敌的调查及利用

研究表明:秦椒田天敌有70佘种,主要14种。以蜘蛛、瓢虫、寄生性天敌、食虫蝽为天敌优势类群。各类群天敌在椒田的发生季节和数量不同,主要受地区差异、栽培方式、椒田化学农药使用量的影响。秦椒田天敌种群数量与害虫发生密度成正相关(γ=0.43～0.79),对秦椒田害虫有很强的控制作用。采用麦椒间套、挖窝诱蛛、插种玉米、花生以及合理使用化学农药,对保护椒田天敌效果显著。

INVESTIGATION AND UTILIZATION OF NATURAL ENEMIES ON HOT PEPPER IN XIAN

70 species of natural enemies on hot pepper field in Xian were found in 1986-1988, there were 14 mian species among them. Spiders, ladybirds, parasites, insectivor ous bugs were dominant types of natural enemies Their occurring seasons and population quantities were different, oweing to the different regions, cultivated types and quantities of insecticides applied. The population quantities of natural enemies were positive correlatet with pest densities on hot pepper field in Xian (r=0.43-0.79), pest insects might be effectivelly controlled by these natural enemies. It is obvious for natural enemy protection that with wheat-pepper interplanting, attracting spiders by men-digging holes, corn and peaunt implanting and the reasonable application of chemical insecticides.