隐蔽施药防治棉铃虫的研究

Studies on the Application of Insecticides in the Soil forthe Control of Cotton Bollworm,HeliocoverpaArmigera Hubner

对泗棉三号进行隐蔽施药防治棉铃虫试验的结果表明，效果略高于或相近常规喷雾法。初步筛选以氧化乐果＋久效磷、或久效磷单独埋施效果最好。甲胺磷埋施经田间接虫和室内饲喂结果比不用药可降低棉铃虫存活率７４．８％和４８．２％。抗虫棉进行药剂埋施防效不明显。隐蔽施药对棉花生育无不良影响。

Slightly higher of similar controlling effects over cotton bollworm,Heliocoverpa armigera Hubner in cotton variety“Simian 3”in field trials were obtained by covering the insecticides up with earth compared with those of common spray.Application of monocrotophos only or mixed with omethoale had the best controlling effect on the pest according to primary screening.In the methamidophos treats the insect survival rates decreased by 74.8% and 48.2% respectively in the field and in the laboratory.Covering the insecticides up with earth had no harmful effects on cotton growing,but could not gain obvious control effects on the bollworm in pest-resistant cotton varieties.