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农作物病虫害常规防治主要分为地上和地下两种,但都存在着各种各样的弊端,而缓释农药地上常规施药主要以喷雾为主,存在着以下几个弊端:一、在喷雾打药时,百分之二十以上的药液并未落在农作物的茎叶上,而落在茎叶上的药液,通过阳光的照射,大多被降解,因而真正的药物利用率不足百分之三十,造成了药物极大的浪费。
Conventional prevention and control of crop pests and diseases are mainly divided into two kinds of aboveground and underground, but there are a variety of drawbacks, while the slow release of pesticides on the ground spraying the main conventional spraying, there are several drawbacks: First, , More than 20% of the liquid medicine did not fall on the stems and leaves of the crop, while the liquid medicine that fell on the stems and leaves was mostly degraded by the irradiation of sunlight, so the actual drug utilization rate was less than 1% Thirty, resulting in a great waste of drugs.