It brings different degrees of chilling and freezing damage to vegetable production, causing the occurrence of low temperature and high humidity diseases(11cm plant pots). If improper management occurs, pests and diseases such as squatting diseases may occur. Soft rot, black rot and downy mildew are the main diseases of cruciferous vegetables cultivated in winter(nursery trays wholesale).
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(black 2 gallon plastic nursery pots in bulk)In the early stage of the disease, 46.1% copper hydroxide water dispersible granule 800 times liquid or 72% streptomycin wettable powder 3000 times liquid can be sprayed and the like(10.5cm plant pots). Enhance ventilation and light transmission in the field, promote plant robustness and improve disease resistance of plants. It occurs mostly after emergence to the time of sham growth.
Chemical control can be used in the early stage of the disease: 70% Daisen joint dry suspension 500 times solution or 30% dimethomorph WP 1000 times solution(plastic nursery pots), 687.5 g / liter of fluorobacteria · downy mildew suspension 800 times liquid spray control . The cabbages and cabbages are the most common and the most severely affected. The fields often occur at the same time, forming multiple diseases and complex infections.
Ventilation and dehumidification, remove the diseased body after harvest, and bring out the field to destroy(stackable planter pots). The chemical control can be alternately used with 50% isourea 1000 times solution or 50% procymidone 2000 times solution, spray the base of the plant and the surface. The agent can be used with 30% carbendazim Family WP 600 times solution or spray treatment, and it can be used once every 7 to 10 days.
Winter is also the period of summer vegetable and eggplant seedlings in the coming year. In the early stage of seedling growth, in case of low temperature, rainy or cold weather, cold wind invaded the seedbed, which is conducive to the occurrence of squatting disease, and the symptoms of individual seedlings begin to appear(one gallon pots for plants). After a few days, the diseased plant is the center of the disease.(black 2 gallon plastic nursery pots in bulk)
Blight is easy to occur when the seedbed is high in humidity, especially when the seedbed is over-sowed and the seedlings are not timely, which is conducive to the spread of the disease(v10 plastic pots). It is found that the diseased seedlings should be removed in time, and for the growth of the thin seedbed or frostbite, the seedlings with poor root growth can be sprayed with potassium dihydrogen phosphate to promote robust growth.
Because the living environment of the winter seedbed is stable, the concealment is strong, and the prevention and treatment is difficult, often causing damage to the roots, dead seedlings, and even a large number of seedlings(plastic nursery pots wholesale). Timely strengthen the temperature and humidity management, choose warm and sunny days to uncover the film, refine the air, and strictly control the temperature and humidity of the seedbed.
(black 2 gallon plastic nursery pots in bulk)Focus on the humidity of the shed to use the dry fine soil moisture absorption method to control the humidity inside the shed(12cm plastic grow pots). The prevention of seedling disease can be carried out by using a broad-spectrum fungicide, which is regularly sprayed before the onset of the disease at noon on a sunny day. Grasp the timely use of drugs in the early stage of the disease to prevent delays in prevention and treatment(wholesale plant pots).
Low-temperature and high-humidity diseases such as leafy mildew and sclerotinia sclerotiorum are also easy to appear(11cm plastic grow pots). Optional 1% biphenyl. Clostrinamide 3 ~ 5 kg / acre or 0.2% bifenthrin 5 kg / acre and other agents for prevention and control(5 gallons pots), when applying the pesticide, do not directly contact the roots to prevent the occurrence of phytotoxicity.