Cauliflower virus disease is extremely harmful, how to prevent and control cauliflower virus disease

The smelting method of cauliflower virus disease mainly harms the leaves, and the symptoms of mosaic leaves, mottled and bright veins appear, and the affected leaves first appear bright veins, and then develop into mottled ones, and the wart-like protrusions along the leaf veins on the back of the leaves are not obvious. In the field, peach aphid and rapeseed tube aphid were mainly used for non-persistent poisoning and juice transmission, and seeds could not be poisoned. The performance is more obvious in cold conditions. In Xinjiang and Gansu Province in June and August, in the north of the Yellow River Basin in mid-to-late August, and in Northeast China from late July to early August, the occurrence of autumn cauliflower virus disease is severe.

In addition, the disease will be aggravated if the sowing is too early, the soil temperature is high, the soil moisture is too low, the disease is aggravated by other cruciferous vegetable diseased fields, the fertilizer and water are insufficient in the early stage, the seedling growth is weak, and the aphids and leafhoppers are heavier. <>

The development of diseased plants is stunted, the bulbs are late, and the leaf bulbs are small and loose. The virus overwinters on cabbage, cabbage, radishes, etc. stored in the cellar or on seed plants, and can also overwinter on cruciferous vegetables, spinach and weeds growing in the field, and is mainly transmitted by contact with aphids and sap in the field. The number of aphids in high temperature and drought is large, the field management is extensive, the seedlings are stunted, and the occurrence of virus diseases is serious.

Control measures: choose disease-resistant varieties. Proper crop rotation.

Shade nets or non-woven quilt cover cultivation technology are used, organic fertilizer is increased, and aphids are watered frequently and aphids are controlled in high temperature and dry seasons to control the occurrence and spread of diseases. Spraying compound foliar fertilizer can inhibit the disease and enhance the disease resistance of plants. In addition, it is necessary to actively control aphids.

In the early stage of cauliflower, 1 000 times of 20% copper morphoguanidine acetate wettable powder, or 40% olefin: morpholinoguanidine soluble powder 1000 times, or 95% triazole riboside 700 times were used to spray evenly. 1 time every 10 days, 2 to 3 times in a row.

reasonable intercropping and crop rotation; Sow seeds at the right time and time to avoid the high incidence of aphids; Apply enough fully decomposed organic fertilizer, rationally apply nitrogen, phosphorus and potassium fertilizer, and water a small amount of water frequently at the seedling stage; Diseased seedlings are found and removed in time. <>

Pesticides. Because my cauliflower was cured of viral disease after being sprayed with pesticides, pesticides should be used to prevent and control it.

First of all, when the cauliflower grows, we should spray a certain amount of pesticides, and secondly, we should also spray some sterilizing agents to effectively remove them, and it will not cause much harm to the human body, and we should also water more.

You can choose varieties that are resistant to pests and diseases, but also avoid planting when pests and diseases are rampant, and also avoid planting during high temperatures, and also find diseased plants in time, eliminate them in time, and use relevant pesticides for control.

Drugs to prevent viral diseases should be sprayed in advance, and at the same time, attention should be paid to watering, but also attention to the problem of lighting, and the choice of fertilizer suitable for cauliflower.

More disease-resistant species should be selected according to local conditions, crop rotation should be reasonable, and seriously diseased plants should be uprooted in time. Cover the cultivation technology with insect nets, increase organic base fertilizer, water frequently, timely control of aphids, and control the onset of diseases.

When there is a virus in broccoli, pesticides and insecticides should be sprayed on the broccoli immediately, so that these viruses can be removed without harming the broccoli.

Pesticides. Because after my broccoli was sprayed with pesticides, the viral disease disappeared, so I thought it should be treated with pesticides.

Its disease is that in the early stage, there will be a lot of small round green spots on the leaves, and then the color of the whole leaf will fade, and finally the leaves will become distorted, and then the whole plant will die.

At first, there will be some small round green spots on the leaves, then the whole leaf will start to fade in color, or some green patches will appear, and then the leaves will start to shrunk, twist and deform, and finally the whole plant will die. Flower balls either become smaller or don't ball at all.

There are spots on the leaves, and the leaves are particularly shriveled, the leaves turn yellow, and the whole plant dies.

The leaves will turn yellow, and at the same time, there will be very serious lines on the leaves, and there will also be wilting, and some will show symptoms of rotting.

How much does it cost to cure early cauliflower.