At present, the disease of strawberry is still a difficult problem in the cultivation of facilities in the suburbs of Beijing.
According to investigations, the main pests and diseases of strawberry plants in the suburbs of Beijing are: root rot, bud blight, gray mold, powdery mildew, virus disease, leaf spot, rotavirus and aphids, aphids, cockroaches, and nematodes. Of these, powdery mildew had the most serious impact on production. Whether it is disease or insect pest control must be grasped early, in particular, the disease can not be prevented after the occurrence, otherwise it is difficult to obtain good results. The so-called early grasp, first, the selection of disease-resistant varieties: such as Hong Shimei, Zhang Ji, Yi B female, sweet Charlie, ghost anger Gan, Golden Star, Po early birth, Shuo Xiang, etc., the main cultivar Hongyan should pay attention to the prevention of powdery mildew The second is to cultivate strong seedlings: the best way is to use nutrient pods or planting methods to raise seedlings, so that the seedling stem length 1 cm or more, stem diameter 0.8-1 cm above, with 5 compound leaves, 40-50 grams of seedling weight and No pests and diseases; Third, strict disinfection before seedling planting: Seedlings are artificially trimmed and then soaked in 1000-fold carbendazim solution for 1-3 minutes to kill pathogens carried by roots, stems, and leaves. If necessary, 1.010-5 g/L can be used. The sodium chlorite solution is soaked for 1-3 minutes to make the sterilization more thorough; the fourth is the strict sterilization of soil, organic fertilizer and greenhouse sterilization; the fifth is reasonable dense planting: the best cultivation method is double row ribbon cultivation, the ridge distance 70-80 centimeters, double row ridges, row spacing are 2020 centimeters; Sixth, nitrogen control, water control: fertilizer mainly organic fertilizer, supplemented by inorganic phosphorus, potassium, strict control of nitrogen fertilizer application.
Earloop Kn95 Face Mask,Kn95 Fold Flat Face Mask,Kn95 Filters Respirator,Kn95 Protective Face Mask
Jiangmen anjian biotechnology co. LTD , https://www.jmanjianmask.com