How to prevent downy mildew of cabbage
In the early stage of the disease, 75% chlorothalonil wettable powder 600 times 800 times liquid, 70% mancozeb wettable powder 800 times liquid and other medicament prevention and protection. The early stage of the disease in mid-September is the key period for prevention and treatment. 58% metalaxyl ·manganese zinc wettable powder N700 times, 20% flumorph wettable powder 1000 times, 60% flumorph mancozeb wettable powder 400 times 600 times, 69% enoylmorpholine mancozeb wettable powder l000 times, 72.2% aldicarb hydrochloric acid salt soluble solution N600 times, 25% metalaxyl wettable powder 600 times, 64% oxidizing manganese zinc wettable powder 500 times, 90% ethyl phosphine aluminum wettable powder 450% 500 times liquid and other medicament spray Spray once every 7-10 days, for a total of 2-3 times.
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Pollution-free production technology of potato stevia and autumn cabbage in early spring
This spring, low temperature, light days, is conducive to the occurrence of Sclerotinia sclerotiorum, the majority of vegetable farmers should start prevention and control as soon as possible to reduce the harm. First, the symptom characteristic after the seedling is susceptible, the leaf appears the water immersion shape light brown disease spot, the edge is not obvious, the disease tissue soft rot causes sudden collapse. Suffer during the heart-filling period, in the vegetable gang near the ground.
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Control of main insect pests in summer cabbage
1. The nutrient solution formula of kale in Beijing is the same as that of hydroponic lettuce, which will not be repeated here. two。 Nutrient solution concentration management kale has strong fertility absorption and requires sufficient fertilizer. The concentration management index of nutrient solution is 2.5-3.0ms/cm, which can be used from planting to harvest all the time. 3...
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