Effectiveness of powder spraying method for prevention and cure of vegetable diseases in greenhouses
The greenhouse vegetables often cause diseases and insect pests because the humidity is too large, and the commonly used spray application method increases the humidity in the greenhouse while controlling the pesticide application. Therefore, the prevention and control of vegetable pests and diseases in greenhouses should be promoted by powder spraying. The dusting method is used to prevent vegetable diseases in greenhouses. It has the advantages of saving labor and chemicals, not increasing the humidity in the shed, and repelling the effects of high efficiency. However, the following matters should be noted.
Pharmaceutics selection of suitable dust agents, such as the prevention of cucumber downy mildew, tomato late blight, use 10% antifungal agents or 5% chlorothalonil dust agent; control cucumber anthracnose, black heart disease, use 5% of the chlorothalonil Clear or 12% Kekeling dust agent; control cucumber bacterial angular leaf spot, use 10% B drop dust agent; prevent vegetable mold, leaf mold, early blight and late blight, choose to benefit from dust agent.
It is recommended to use domestically produced bumper type 5 or type 10 hand powder dusters. Before the spraying, the shed was closed, and then the powder was sprayed at 1 kilogram per acre. The pesticide was put into a duster kit and the powder output was adjusted to about 200 grams per minute.
Pay attention to the time of spraying should be sunny in the morning or late evening application, cloudy and rainy days can be sprayed. The effect of applying pesticides is best after closing the shed in the evening. In the sunny morning to the afternoon when the sunlight is strong, the dustproof effect is low.
Pay attention to the spraying method Spraying powder against vegetables, whether homogeneous or not, the effect is very poor. Only uniform air spray effect is good. If the air spray is not uniform, part of the powder cannot be well dispersed and the control effect will be reduced.
Attention to personal safety Spraying personnel should pay attention to wear a mask to reduce the harm of the medicine to the human body. After spraying, it can be picked after half a month to ensure food safety.
For the most common waxy and sweet corn on the market, waxy corn has a higher nutrient content than regular corn, containing 70-75% starch (and almost all straight-chain starch), more than 10% protein, 4-5% fat and 2% multivitamins, with more grains, VA, VB1 and VB2 in protein than rice, with the highest fat and VB2 content. Yellow maize also contains carotenoids, such as rice and wheat. The molecular weight of waxy maize starch is more than 10 times smaller than that of ordinary maize, and the starch makes glutinous rice sticky and soft, softer than ordinary hard maize. It is more than 20% more digestible to eat than regular maize and it is suitable for people with less than perfect teeth. At the same time, it is not suitable for diabetics because of the very high content of straight-chain starch (a polysaccharide).
Waxy maize is also known as sticky maize. The grain has coarse, waxy endosperm, similar to shiny, glassy (clear) grains such as hard and dent maize. Its chemical and physical characteristics are controlled by a recessive gene, which is located on chromosome 9. 100% of the starch in the endosperm is straight-chain starch.
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