谷子粟叶甲发生与药剂防治

Occurrence and Chemical Control of Oulema tristis Herbst on Millet

粟叶甲是谷子苗期为害性较大的害虫。近年来,由于栽培技术、品种及气候环境的变化,粟叶甲在辽西地区发生呈逐年加重趋势。在辽西地区进行粟叶甲田间为害调查,并进行了6种药剂的田间药效筛选试验及粟叶甲防治适期试验。结果表明：防治粟叶甲的理想药剂为28%高效氯氰菊酯乳油和12.5%敌杀死乳油;最佳防治时期为6月上旬卵盛期,即谷子3~4叶期。同时明确了粟叶甲在辽西的发生特点为1 a发生1代。

Oulema tristis Herbst caused a severe damage to the seedlings of millet,which became severer in recent years in West Liaoning for the cultivation techniques,variety and the environmental change.The damage of O.tristis was investigated.The efficiency of six pesticides and the optimum control period were selected.The results showed that the efficiency of 28% beta-cypermethrin EC and 12.5% deltamethrin EC was the best.The first ten days of June were the optimum control period.O.tristis in West Liaoning had one generation a year.