The latest course of techniques and methods for the control of maize bacterial wilt

Corn is an important food crop in China, which has a wide planting area, but in the process of corn planting, bacterial wilt will lead to a large number of corn production reduction. So how to control corn bacterial wilt? Let's take a look at the detailed introduction with the editor.

1. Symptoms

Bacterial wilt has become one of the main diseases of maize in the middle and later stage. it is an infectious disease of the whole plant, which generally begins to occur at the filling stage and spreads from bottom to top, showing the shape of wilt. When the disease occurs, the stem base of the diseased plant becomes soft, the interior is loose, and it is easy to fold in case of wind, and some of them are characterized by sagging ear, soft ear stalk, not easy to peel, and extremely difficult to harvest. Wrapped leaves will also show wilt shape, the root system is obviously underdeveloped, the root is few and short, and it will gradually become black and rotten. If you cut the stem, you will find that the pith is loose, the grain arrangement of the diseased ear is loose, it is easy to fall off, and the grain color is gray and dull.

2. The regularity of the disease

The disease is mainly due to the overwintering bacteria in the soil, which is gradually invaded by the root system from sowing to the heading and silking stage, and spreads in the plant, resulting in infection. It is very easy to occur in the weather of high temperature, high humidity and sunny weather after rain from maize grain filling to mature stage. In addition, the varieties with weak disease resistance were also easy to catch the disease, while the dwarf, early maturing and double panicle varieties were more serious. Higher planting density, partial application of nitrogen fertilizer and application of unmature farm manure will also induce the disease. The disease was serious in early sowing time, mild in late sowing time, and serious in low-lying and water-prone plots.

3. Prevention and control methods

First of all, the excellent varieties with disease resistance and disease tolerance should be selected. after harvest, the field should be cleaned, the disease remains should be burned and buried in the soil as fertilizer. Reasonable rotation, with other crops for 2-3 years, can reduce the incidence of disease, spring sowing corn can be appropriate late sowing, can alleviate the disease. The measures such as strengthening field management, increasing organic fertilizer, timely ploughing and drainage during planting can promote the strong growth of maize and enhance the disease resistance of the plant. The application of potash fertilizer or nitrogen, phosphorus and potassium compound fertilizer at jointing or booting stage can have an excellent control effect. At the same time, attention should be paid to the control of corn borer, armyworm and so on, which can reduce the occurrence of diseases.

The above is the introduction of corn bacterial wilt control technology, hope to help you, understand more related knowledge, please pay attention to us.