Hazardous symptoms and time of occurrence: mainly harm the leaves, but also harm the new shoots, petioles, inflorescences, stalks and young fruit. Downy mildew generally begins to occur in July, and gradually increases in mid-July and late July. It is a period of high incidence from August to September. Key prevention period: From the beginning of June to the pre-mature period before and after each rainfall, it is the critical period for controlling downy mildew. From July to September, it is the key prevention period. Qingdao Beautiful Skin Biotechnology Co., Ltd , https://www.hafilleresthetic.com
Control agent: 600% of 70% Baoye Zinc Zinc and 80% of Baoyexin Manganese 600 times. After each rain, 200 times of Wangquan, 72% of methane Mn-Zn, and 800 times of 10% Dimethomorph were alternately used. Before the rain can be used interchangeably.