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近几年来,各地防治粘虫大都使用DDT或DDT与666混合剂,效果很好。为了寻求更多的有效药剂,曾以天津农药厂(1962年)试制的4％及2.5％敌百虫粉剂,进行田间防治试验及室内效果测定。 田间药剂试验:在春谷田进行,用4％和2.5％敌百虫粉、5％DDT粉,每亩合3斤及对照区,重复两次,小区面积0.235亩,各药粉均以稀纱布袋抖撒,1962年8月10日下午4—6时施药。当时粘虫孵化率为75—84％,幼虫多为1—2龄,防治效果如表1:
In recent years, most of the control of armyworms around the world using DDT or DDT and 666 mixture, the effect is very good. In order to seek more effective pharmaceuticals, field trials and laboratory tests were conducted on 4% and 2.5% trichlorfon powders tested by Tianjin Pesticide Factory (1962). Field Pharmacy Test: In Spring Valley field, with 4% and 2.5% trichlorfon powder, 5% DDT powder, 3 kg per acre and control area, repeated twice, the plot area of 0.235 acres, the powder are sparse gauze bag Jiao Sa, August 10, 1962 4-6 pm application. At that time, the hatching rate of armyworm was 75-84%, larvae were mostly 1-2 years old, and the control effect is shown in Table 1: