Occurrence and Prevention of Welsh Onion Shrinkage

Scallion dwarf disease, also known as yellow dwarf disease, is a symptom of the onion after it has been infected by a virus. In recent years, the onion fields in our city have been widespread, especially the old vegetable areas and onion production bases. The disease has gradually increased. After the onset of illness, lighter people reduce production by 20% to 30%, and severely reduce production by 75 or so. The pathogen of Welsh onion dwarf disease belongs to the virus and it is one of the major diseases occurring in the onion and garlic crops in recent years. The yellow dwarf virus appears on the onion head, the yellow bar virus on the garlic, and the latent virus on the green onions. Just planted onion seedlings, good growth, if the high temperature and drought in July, there are a few typical atrophy disease in August, the peak incidence from mid-September to mid-October. The new leaves produced at the initial stage of the disease are thin and young, the leaf color becomes lighter, and yellowish spots appear on the heart leaves. The leaves are uneven and spirally twisted. Some leaves twist to one side, the plants shrink, and the onion grows. The smaller the grows. According to field observations, the old vegetable fields were planted with seedlings; the seedlings were planted before the "equinox"; the spring fleas were more in the spring of the following year; the onions were planted in the sun; the onion was in the seedling stage; the aphids were heavier; and the soil drought after colonization was revived; Temperatures are high and rainfall is low. According to the occurrence characteristics of wilting dwarf disease, taking comprehensive cultivation measures can greatly reduce the occurrence of this disease. (1) Use Zhangqiu Indus, Wuyeqi and their first generation hybrids, Luoyang Holly, and Tangshan solo and other disease-resistant varieties; (2) Submit the "Equinox" before the early breeding seedlings for the "Equinoxes" late night nursery, vigorously promote "Spring equinox" mulching film covering the spring of seedlings; (3) 40% dimethoate and 80% dichlorvos mixed solution at the seedling stage 1000 times, plus a small amount of detergent or waste soybean milk, increase the adhesion ability (the same medication), prevention and treatment Horses and locusts; (4) Replanting onions before planting base fertilizer, dialing seedlings, grading with dimethoate potions 1000 times, strong seedlings planting; (4) After planting and resurrection, onion trenches covered with wheat bran 250 kg / 667 square meters Or potatoes, fresh weeds 300 kg / 667 square meters moisturizing cooling, sparsely soil fertilizer field; (6) August to October growing season, top-dressing onion on a special compound fertilizer 50 kg / 667 square meters, topdressing urea 2 times Each time 20 kg/667 square meters, top dressing and cultivator, earth, watering each other to promote the growth of onion strong seedlings; (7) before spraying onions 2 times, 7-l0 days once, after spraying 3 times naphthalene acetic acid Amines solution, 1 bottle of water 20 kilograms, prevent disease and strong trees; (8) If there are still a few diseased plants on the onion field, 0.5% of anti-sick hormone No. 1 can be used 300-400 times or 25% of the resistance. Virus No. 1 WP 300 times, or 1.5% of the plant disease spirit 400 times, complete prevention and control to ensure that the onion strong harvest.

Fresh Carrot,temperature: Carrot is a semi-cold crop. Its cold resistance and heat resistance are stronger than radish. The open cultivation in our city can safely winterize.  Carrot seeds can germinate at 4~6°C,  but the most suitable germination temperature is 20~25°C;  optimum temperature for growth:  18~23°C during the day,   15~18°C during the night, growth retardation above 25°C,  stagnation under 3°C Grow. Moisture:  Carrot roots are well developed,  the leaves are 3 to 4 pinnate, leaf area is small, water loss is less, so it is more drought-tolerant.

Fresh Carrot

Fresh Carrot,Red Carrot,Bulk Fresh Carrot,Fresh Farm Carrots

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