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[目的]为减少田间施药量与用水量,利用扇形喷雾技术对暴发期棉蚜进行田间药效试验。[方法]采用单因素随机区组试验设计,开展喷头类型与桶混助剂对啶虫脒防控棉蚜的影响试验。[结果]采用扇形喷雾技术防治棉蚜,当药量不变水量降低50%,处理棉蚜3 d后防效达95.2%,7 d后防效达98.6%;当药液中加入桶混助剂,药量降低20%时,处理棉蚜3 d后防效均大于97.1%,7 d后防效达100%。[结论]采用扇形喷头替代锥形喷头喷雾防治棉蚜,提高了药液的雾化效果,生产中可节省用水量50%。施药前添加桶混助剂显著降低了啶虫脒药液表面张力,可节省药量20%。
[Objective] In order to reduce the amount of pesticide applied and the amount of water used in the field, a field spraying experiment was conducted on the cotton aphid in the outbreak period by using the fan spray technique. [Method] The single factor randomized block design was used to test the effect of sprinkler type and bucket mixed aids on the control of acetamiprid against cotton aphid. [Result] The control effect of the aphid by the fan spray technique was 50% when the dosage was unchanged, 95.2% after 3 days of treatment, and the control effect reached 98.6% after 7 days. When the dosage and dose were reduced by 20%, the control effect of cotton aphid was more than 97.1% after 3 days treatment and 100% after 7 days. [Conclusion] The fan nozzle was used instead of conical nozzle spray to prevent cotton aphid, which improved the atomization effect of the liquid and saved 50% of water consumption in production. Adding barrels before adding additives can significantly reduce the acetamiprid liquid surface tension can save 20% of the dose.