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粘虫是麦类的主要害虫之一,怎样做好二查二定、正确定好防治指标和防治田块,对消灭虫害,确保春粮作物丰收,有着重要的意义。 我省根据历年情况,经过有关部门试验鉴定,把粘虫的防治指标定为:凡每亩虫口在6000条以上的定为防治对象田。从1975-1976年的情况来看,各地同志在实践中有这样的反映:这个防治指标似乎太低了。例如嘉善县农业局发动群众坚持查密度,定田块,掌握了当年粘虫的发生特点是蛾多虫少,他们通过试验和实践,大胆地提出:每亩虫口密度在10,000条以下的田块,进行点治(由植保员身背喷雾器进行目测查虫,看到虫多的地方喷雾),而虫口密度在10,000条以上的田块,则定为防治对象田。因此,全县定为防治对象田的田块,只占总面积30％左右,其余田块均采取了点治或不治,同样收到了较好的防治效果。县农业
Mythimna separata is one of the main pests of wheat and how to do a good job of checking the two and setting proper control indexes and prevention and control plots has great significance for eliminating pests and ensuring the harvest of spring crops. According to the historical situation in our province, after the relevant departments to test the identification of the prevention and treatment of armyworm as: where per acre in more than 6,000 as a control object Tian field. From the situation in 1975-1976, comrades in various places have reflected in practice that the indicator of prevention and control seems too low. For example, the Jiashan County Bureau of Agriculture mobilized the masses to persist in checking the density and fixing fields and mastered the occurrence of armyworms in that year. The moths and pest insects were characterized by fewer moths. Through tests and practices, they boldly put forward that plots with densities below 10,000 per mu , Point treatment (visual inspection of insects by plantator’s sprayer to see insects and more places to spray), and insect population density of more than 10,000 plots, as the control field. Therefore, the entire county is designated as a field for the prevention and treatment of field plots, accounting for only about 30% of the total area. The rest of the plots have taken either point-based treatment or non-treatment and also received better prevention and control effects. County agriculture