How to control aphids of snow vegetables

Snow vegetable, scientific name: Brassica juncea var. Crispifolia, alias: Shiraki, Jiutou, cooking, vegetables, etc., Brassica, angiosperm phylum, is a kind of mustard. Snow cabbage is the tender stem and leaf of cruciferous mustard, which tastes cool and belongs to the lung, spleen and stomach meridians. It has the effect of diuresis and relieving diarrhea, dispelling wind and dispersing blood, reducing swelling and relieving pain. It is a common folk herbal medicine for the treatment of adverse urination, dysentery, hemoptysis, swollen gums, hoarse throat, swelling and pain of hemorrhoids, itching of lacquer sores, injury caused by falls, joint pain and so on. It can be applied externally or eaten internally.

Brassica campestris is a mustard species of Brassica and is a variety of tillering mustard. There are many nicknames for snow vegetables, which are called "snow mustard", "Jiutou" and "cooking" in Jiangsu and Zhejiang, and "vegetables" in Hunan and Hubei. They are important vegetables widely cultivated in winter and spring in the Yangtze River valley in China. They are eaten with petioles and leaves and have high nutritional value. According to analysis, water accounts for 91% per 100 grams of snow vegetables, 1.9 grams of protein, 0.4 grams of fat, 2.9 grams of carbohydrates and 3.9 grams of ash. Calcium 73-235 mg, phosphorus 43-64 mg, iron 1.1-3.4 mg. Human body is rich in vitamins necessary for normal life activities. There are 1.46-2.69 mg of carotene, 0.07 mg of thiamine (vitamin B1), 0.14 mg of riboflavin (vitamin B2), 8 mg of nicotinic acid and 83 mg of ascorbic acid (vitamin C) in 100 grams of fresh vegetables. And because it is rich in mustard oil and has a special spicy flavor, its protein can produce a large number of amino acids after hydrolysis. Pickled and processed snow vegetables have bright yellow color, rich aroma, crisp and delicious taste, whether fried, steamed, boiled, soup as seasoning, or served on the table alone, are deeply loved by urban and rural residents.

How to control aphids of snow vegetables?

What are aphids?

Aphids are also called oil worms and greasy worms. Their bodies are yellowish green or dark brown. They have strong fecundity and can produce ten to twenty generations a year. It mainly harms the young leaves and buds of flowers. Flower buds and petals, sucking juice, can make the young leaves of flowers curl, bud atrophy, bud deformation, shorten the life of flowers. Aphids can harm a variety of greenhouse flowers, such as mulberry, pomegranate, woody night incense, chrysanthemum, melon chrysanthemum, rose, safflower, Jiuli incense, yellow oleander and so on. At the same time, it can secrete sugar and induce other diseases such as soot disease. therefore, if aphids are found, prevention and control should be carried out immediately.

Control methods of snow vegetable aphids:

1) remove all kinds of weeds in time to prevent the spread of aphids.

2) spray 40% dimethoate emulsion 1500 times, or 80qo dichlorvos and 40qo dimethoate emulsion mixed with 1500-2000 times liquid, or soak 15 rooms with 1 jin of tobacco and spray one day and night later.

3) using natural enemies to control aphids, there are mainly discolored lady beetles and seven-star lady beetles, especially when chrysanthemum aphids occur, there are often a certain number of seven-star lady beetles, which plays a certain role in controlling and killing chrysanthemum aphids. therefore, when using drugs to prevent aphids, we must be cautious and pay attention to protecting the natural enemies of aphids.