Symptoms and Prevention of Corn Smut

First, smut symptoms Corn smut is a local invasive disease, a long time of infection, corn can be infected from the seedling stage to maturity. At the onset of seedling stage, shoots near the base of the stem or on the back of the leaves produce small nodules. The blackish aneurysms on the base of the stem expand more, and when severe, the seedlings can die. Plant diseases are most seriously affected by the ear, and when the disease occurs, the upper half or individual grains of the ear produce nodular bacillary dysentery. In severe cases, the whole ear forms malformed bacillary dysentery, which is white at first, later grayed, and later formed white gray. To the dark gray film, after the film ruptured, black-gray powder (ie, teliospores) was emitted, and the teliospores germinated immediately and reinfected. In areas where perennial wheat-corn crops are grown, a large number of pathogenic bacteria are scattered in the fields, and the same species is cultivated for many years, which can easily lead to the accumulation of germplasm. In addition, in recent years, high temperature and drought in summer, the temperature from seedlings to silking stage and teliospore germination are suitable. Consistent temperature, epidemic can easily cause disease.
Second, comprehensive prevention and control measures
1. Plant resistant varieties. The selection of local anti-disease hybrids based on local conditions is the fundamental measure against smut, and it is also the most cost-effective method of prevention and control.
2. Eradicate and reduce the source of bacteria. In the maize seedlings, diseased plants are removed in time and brought out of the field. During the jointing stage to the heading stage, tumors and diseased plants are found. The diseased tumors or diseased plants should be removed in time. After the corn is harvested, it should promptly and completely remove the plant residues in the field, carry out deep plowing, and reduce the source of infection.
3. Improve cultivation measures.
(1) According to local conditions, a reasonable rotation. Based on the actual situation in different regions, rational rotation with non-host crops such as soybeans and peanuts can reduce the source of infection. In addition, the variety rotation can also play a preventive and control role in the production of the same land as much as possible to avoid planting the same species.
(2) Strengthen field management and enhance plant disease resistance. Timely sowing, appropriate depth and depth of sowing, promote seedlings early, reduce the chance of infection. Closely plant the plant, cultivate strong seedlings, and enhance the resistance of the variety. Strengthen the management of fertilizer and water, pay attention to the application of nitrogen, phosphorus and potassium to avoid partial application of nitrogen fertilizer. Irrigation should be timely, especially before and after tasseling, to ensure water supply. Timely control of corn borer and other pests, reduce wounds to avoid infection. In addition, the disease should be removed and destroyed immediately before the rupture of the tumor to reduce field transmission hazards.
4. Chemical control. Seed-borne seeds are the main infestation sources of smut, and seed dressing or seed coating not only inhibits the pathogenic bacteria that the seeds carry, but also have certain preventive and control effects on the infection of soil-borne bacteria when the seeds are germinated. Production should be selected strong absorption, long residual effect of the drug (carbendazim, pentachloronitrobenzene and other fungicides) seed dressing, soaking. In the severe ward area, attention should be paid to adding some bactericidal agents such as carbendazim powder to the medicament to enhance the control effect.

Imported French lens

Healthyou med technology is professional for the LED operation light more than 10 years in China 

We are also provide Portable Operating LED Light for operation room series .

 

Each LED can be replaced individually, which guarantees maximum economy.

 

Configuring  lightweight  balance arm suspension system ,six groups  universal  joint  linkage ,mobile, lightweight  positioning  and stablibity .A 360°all-round design ,can meet the need for surgery in different heights and angles.

color temperature constant, soft, very close to the natural sun light.

The use of liquid crystal display button control, to meet the needs of the medical staff of different patients with the brightness of the operation.

LED Operating Light

LED Operating Light,Portable Operating LED Light,Surgical Operating LED Light,LED Surgical Light

Shandong qufu healthyou Medical Technology co.,Ltd , https://www.kangerjianmedical.com