农药对靶喷撒技术研究初报

通过稻，麦，棉，茶，黄瓜，油菜等作物上一系列农药喷撒试验和生产性示范表明，采用对靶喷撒技术和相应的喷撒手段，可显著提高农药在有效靶区的沉积率，农药用量可％－５０％，喷雾用水量可降低９５％以上。农药对靶喷撒技术是根据病菌或害虫在作物上的分布，作物的田间群体结构以及农药雾滴在株冠中的行为的综合研究所提出的化学防治法的一项基本原理和基本技术。

PRELLMINARY STUDIES ON TARGET SPRAY OF PESTICIDES

After a series of research work and field trials conducted on rice,wheat,cotton,tea,cucumber and rape,the deposit rate(or recovery)of pesticide on effective target area of these crops could be greatlyincreased,if an effective application technique,the target spray,andcorresponding special sprayers were chosed.And accordingly,40-50%of applied pesticides and more than 95% of water could be saved.Targetspray is considered as a new idea or new philosophy of pesticide ap-plication technology,which is based upon the different distribution ofpests on crops,the specific field population structure of crops and thehehaviour of spray droplets within the canopy.Pest distributions areclassified into three different types:crowded distribution,scattereddistribution and alterable distribution.Air-assisted twinfluid sprayergave a higher deposition of pesticides on effective target area.