泰山-18BC型机动喷雾机防治小麦白粉病效果与喷雾质量关系研究

泰山 - 18BC型机动喷雾机喷施三唑酮防治小麦白粉病效果显著 ,施药剂量少 ,持效期长。90 g/ hm2 剂量和 75L / hm2 施液量比较合适。在一定范围内药效随着农药沉积量的增加而相应地提高 ,其农药沉积量的 ED50 和 ED90 分别为 1.32μg/ cm2 和 2 .4 1μg/ cm2 。与工农 - 16型手动喷雾器相比 ,机动喷雾机工效高 ,施液量少 ,雾化较细 ,且有风机气流辅助 ,易沉积在靶区上 ,可减少对土壤和环境的污染 ,具有取代手动喷雾器的优越条件。

RELATIONSHIP BETWEEN THE DISTRIBUTION OF FUNGICIDE AND EFFECTS OF CONTROL AGAINST WHEAT POWDERY MILDEW BY SPRAYING TRIADIMEFON WITH TAISHAN-18BC MOTORIZED MISTBLOWER

A good and sustained effect of control against wheat powdery mildew by spraying fungicide (triadimefon) with Taishan-18BC, a new model of motorized mistblower,was achieved in the field during 1997-1998. The dosage of application at 90 g/hm 2 in a volume rate of 75 L/hm 2 were suitable for the field use. Within a certain range,the effects of control raised with the increase of the amount of fungicide deposition. The ED 50 and ED 90 of triadimefon deposition were 1.32 μg/cm 2 and 2.41 μg/cm 2, respectively. Compared with Gongnong-16,a model of lever-operated knapsack sprayer,the motorized one showed labor-saved, lower dosage, less volume of spraying liquid and smaller droplet. And with the aid of airflow of the fan , the droplets was conducive to increase fungicide deposition on target plants and decrease environmental pollution. All those advantages above-mentioned suggest that the lever-operated sprayer should be replaced by the motorized mistblower in the near future.