Pest control in the late stage of wheat growth

Recently, I have consulted a large number of peasant households on wheat pest control. I have also gone to some places and combined with the monitoring situation, I feel that there are still several problems in the prevention and control of late stage pest diseases. Now I have put forward the following prevention and control suggestions:

First, wheat scattered smut prevention and control throughout the province monitoring, this year's scattered smut occurred more than ever before. On May 3, I went to the town of Nantuo Ma in Luancheng County and found that several wheat fields had scattered smut, with symptoms ranging from one bush to another, ranging from 3 to 5 bushes each. Scattered smut is commonly known as black peony, black wheat, and gray bag. The diseased plants are characterized by a shorter dwarf than healthy plants and early earing. The diseased ear has already been shed with black powder and the black powder is the spores of the pathogen. The spores of the pathogen spread to the stigma of healthy plants as they pass through the wind, and they invade the ovary, so the seeds will carry the bacteria. What are the medicines for preventing and controlling smut? The answer is: There is no need for medication. The correct method of prevention and control is:

1. Remove the sick ear. Immediately remove the diseased ear and take it out of the field to bury it or burn it. If it is thrown out of the field, the bacteria will still blow back.

2. Change. As the bacteria invade the wheat that is flowering and enters the embryo, the seeds will germinate in the following year. The pathogen will grow and reproduce until the ear is harmed, so the seeds are the only source of infection. Fields with scattered smuts may carry bacteria. Therefore, in order to prevent recurrence next year, please replace the seeds of the field.

3. Seed dressing. Before sowing, use 2% Rikenxi wet seed dressing agent 10 ~ 15g seed dressing.

Second, adult control of wheat midge insects Dingzhou, Zhengding and other farmers to consult, the field has seen the red mosquitoes, they see the red mosquitoes are midge insects. Dingzhou farmers also found red and yellow ova. At present, it is the time to control the adult wheat midge. However, there are still key issues that need to be grasped in prevention and control. The first is the simultaneous prevention and control of multiple households. Farmers proposed that my family use only drugs to kill insects, but other neighbors do not fight drugs, whether the red mosquitoes fly to the oviposition hazard of wheat used drugs. The answer is yes. According to research, midge adults can spread with the wind at close range. Partially loose species, adults will choose to spawn. Therefore, we must take joint action on the prevention and control and spray them together. The second is to prevent and treat medication immediately. Because adults only live 2 to 3 days, the first day of eclosion begins to spawn, and the second day of eclosion lays the most eggs. Then see the red mosquitoes should be eliminated immediately. Chloramine phosphorus is preferred. In addition, imidacloprid, acetamiprid, and high chloride can also be used.

Third, the late one more spray to prevent the need to pay attention to the problem of pest control and promote yield, should use a multi-effect agent, and pesticides, fungicides and fertilizers mixed application. Although people generally do so, but according to the changes this year, we should still draw attention to several issues.

1 pay attention to control effect. The glutinous wheat bran has reached the standard and it has been used. Some places reflect that the effect of using high chlorine or imidacloprid is not ideal. The reason for the analysis is that there is no systemic absorption of high chlorine, and the effect of imidacloprid is reduced at low temperatures. It is recommended that chloramiphos be used instead. Chloramine is a broad-spectrum organophosphorus insecticide and acaricide. It has contact, stomach and fumigation effects on insect pests. It also has certain internal absorption and conduction effects, and has a long residual effect. It has a strong smoke and virulence and is a quick-acting insecticide. The agent also has an ovicidal effect on fleas. Mainly used for rice, cotton, fruit trees, sugar cane and other crops, can control Lepidoptera, Coleoptera larvae, as well as aphids, planthoppers, leafhoppers, earthworms, underground pests. Instead of methamidophos. But the toxicity is reduced for safe pesticides.

2. Check red spider at a proper time. In the field, the investigation of the leaves was already yellow and white, and a large population of red spiders on the field covered the stems and ears. And is Maiyuan spider. Therefore, this field should be treated together with wheat stubble.

3. Powdery mildew to control the appropriate period. The occurrence of the phenomenon is characterized by a strong growth and a high density. The condition often occurs first under the tree. For example, the disease center appears in the first place under the tree in Dingzhou. The incidence and species are closely related. Xinji survey on May 19, 2008, the city's sick field rate of 55%, sickness rate of 30%. Sensitive varieties 733, 828 disease stem rate 100%, diseased leaf rate 75% to 80%. So pay special attention to wheat fields in these situations.

Prevention formula:

(1) Mai Mai: 30% chloramphenicol EC 75 ml/mu, and cure red spider. Or 20% butyl sulfide carbofuran EC 30 ~ 40 ml, 5% Western venom (1.5 imidacloprid + 3.5% high chlorine) EC 2000 times.

(2) Powdery mildew: spraying with 3000 times of 43% tebuconazole suspension of Sinochem or 12.5% ​​of diniconazole wettable powder. It also protects against leaf rust, head blight and leaf blight.

(3) 1000-grain weight, anti-dry hot air: Love more than 6000 times liquid + 0.3% potassium dihydrogen phosphate +1% urea. The pest control, disease prevention, and production promotion of drugs and fertilizers mixed application. Once a day for 7 days, use 2 times in total.

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