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Influence of droplet spectra on the efficiency of contact fungicides and mixtures of contact and systemic fungicides

机译：液滴光谱对接触杀菌剂以及接触杀菌剂和全身杀菌剂混合物效率的影响

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The effects of droplet spectra, spray volume, and the addition of an adjuvant to the spray solution against Phytophthora infestans were evaluated using contact fungicides, mixtures of contact and systemic fungicides, and a contact fungicide + an adjuvant. Six droplet spectra, ranging from VMD = 183 μm to VMD = 939 μm, were used. The spray volumes were 300, 450 and 600 l/ha for the contact fungicides, and 300 l/ha was used for the mix of contact with systemic fungicides. No significant differences in efficiency were observed between different droplet spectra when used for the mix of contact with systemic fungicide treatments. However, the efficiency of treatments with a contact fungicide significantly increased with smaller droplet spectra. The larger droplet spectra required larger spray volumes for greater efficiency. The addition of the adjuvant (pinolene, 96%) to the spray solution of the contact fungicide caused the efficiency to be similar for all droplet spectra. The effect of droplet spectra is more pronounced in contact compounds. The translocation of the systemic compounds and the ability of the surfactant to improve the coverage with contact compounds may be the main mechanisms that counteract the effects of larger droplet spectra and lower leaf coverage.Keywords:Phytophthora infestans; fungicides; water volume; droplet size; droplet densitydownload PDF Impact factor (Web of Science – Thomson Reuters) 2016: 0.742
机译：使用接触性杀菌剂，接触性和全身性杀菌剂的混合物以及接触性杀菌剂+辅助剂评估了液滴光谱，喷雾量以及向喷雾溶液中添加抗疫霉菌的助剂的效果。使用了六个液滴光谱，范围从VMD = 183μm到VMD = 939μm。接触杀真菌剂的喷雾量分别为300、450和600 l / ha，与全身性杀真菌剂接触的混合物的喷雾量为300 l / ha。当与全身性杀菌剂处理混合使用时，在不同液滴光谱之间没有观察到效率的显着差异。但是，接触杀真菌剂的处理效率随着液滴光谱的减小而显着提高。较大的液滴光谱需要较大的喷雾量才能获得更高的效率。在接触杀菌剂的喷雾溶液中添加佐剂（pin烯，96％）使效率对所有液滴光谱都相似。液滴光谱的影响在接触化合物中更为明显。全身性化合物的易位和表面活性剂改善接触化合物的覆盖能力可能是抵消较大液滴光谱和较低叶片覆盖率的主要机制。杀菌剂水量液滴尺寸液滴密度下载PDF影响因子（科学网–汤森路透），2016年：0.742

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