How many times do you need to spray pesticides to kill insects when planting wheat from seedling to

Planting any crop, vegetables are basically inseparable from pesticides, if the occurrence of pests without pesticides, may reduce or extinct yield, directly respond to the current year's output and economic income.

How many times do you need to spray pesticides to kill insects when planting wheat from seedling to maturity? It depends on the insect situation and the epidemic. If you need to fight insecticides, you must play insecticides in time, you don't need to play insecticides, and you resolutely don't fight.

In the process of wheat planting, it is necessary to prevent diseases, supplemented by insect pests. First, plant wheat in autumn to winter, there are basically no pests during this time, because the weather slowly becomes cooler and colder, which is not conducive to reproduction and growth, and pests also enter the death and hibernation period, basically no need to manage! Second, in the warm spring season, the wheat begins to turn green, this time is the most critical, after the beginning of spring, to clear the ditch and drain water, ventilation and dehumidification, to keep the plant has enough light, to cultivate the soil in time, remove weeds.

In high temperature and humidity environments, aphids and red spiders occur too heavily. In addition, wheat sheath blight, standing blight, root rot, and scab will also occur more often. In terms of control, disease prevention cellars are more important than pest control.

It is necessary to strengthen the prevention and control of wheat sheath blight, standing blight, root rot, scab and rust, once found, pay close attention to spraying with 50% emulsifiable octane and phosphorus mixed with water 300 times.

Third, before and after the wheat flowering period, aphids will occur due to climatic reasons, the fastest and most serious occurrence during drought, with 70% imidacloprid particles mixed with water, according to 1:1200 times to prepare an aqueous solution for spraying, at this moment to spray evenly, after the inspection if found that there are insect pests, should be sprayed a second time!

Although wheat is good to plant and manage, but the later management is very critical, find pests, spray and treat in time, avoid the occurrence of pests caused by yield, economic losses, and ensure high and stable wheat yield according to the climate!

First of all, look at the key period of wheat pesticide What are the pests and diseases of wheat growth stage sowing, seedling, tillering, wintering, returning to greening, jointing, heading, flowering, filling, milk ripening before wheat back to green jointing, because the temperature is low, pests and diseases are not very active, plus wheat sowing, generally through the seed dressing treatment, seed dressing has disease prevention and insect resistant substances, wheat sowing before seed coating, pesticide dressing, is to reduce the number of pests and diseases, move forward to the prevention and control pass, reduce the occurrence of pests and diseases in the coming year as a key measure, Therefore, there is basically no need for management at this stage.

It is enough to spray the general variety of wheat twice, once when the seedlings emerge, and once when the heading is pulled, which can control pests well.

It is sprayed about three times, the first time at the beginning of germination, the second time before the long spike, and the last time after the long spike.

Summary. When the temperature is not lower than 15 degrees Celsius.

The temperature of wheat spraying to prevent insects is how much is best.

When the temperature is not lower than 15 degrees Celsius.

Insecticides and fungicides at temperatures of 8-9 degrees Celsius will affect the control effect of some pesticides! Most pesticide varieties play normally at 20-28 degrees, and the physiological activity of crops in this temperature range is strong, and the physiological activities of crops are limited at low temperatures, so it will also affect the absorption and utilization of pesticides. Especially those temperature-sensitive pesticides, such as imidacloprid, acetamiprid, etc., will be much more effective at high temperatures when they leak at low temperatures, so this is also the reason why it is not recommended to use closed-finger pyridoxridan and acetamiprid in the low temperature period of winter and spring.

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It's better in the spring because there are more bugs and it's more humid.

Early morning or late afternoon. General pesticides and herbicides are now mixed and used. As long as the acidity and alkalinity are consistent. Generally, pesticides are acidic, except for a few alkaline preparations such as copper preparations, mercury preparations, and Bordeaux liquid.

Dear, hello, after the wheat Tanshan flowers, it should generally be sprayed 3 to 4 times of pesticides, and the specific amount depends on the actual situation. First of all, apply pesticides once when the wheat is flowering, spray twice when the wheat enters the growth season, and finally spray herbicides once again to prevent grass pests (some grass pests will damage the wheat after heading). In addition, when spraying pesticides, the type, amount and frequency of pesticides should be determined according to the actual situation, so as to obtain better results.

In the later stage of wheat planting (heading to flowering stage), 50-100 grams of 99% high-purity potassium dihydrogen phosphate and 10 grams of boron can be sprayed with water, which has the effects of anti-lodging, enhancing wheat grain fullness and preventing scab, dry and hot wind, and premature aging of wheat. The principle of fertilization in the later stage of planting is to prevent both premature aging and greed, and potassium dihydrogen phosphate can be used. Water the grouting water in a timely manner to resist the harm of dry and hot wind, watering according to the dry and wet conditions of the soil, and avoid watering in windy and rainy days.

1. What kind of medicine to take in the later stage of wheat

1. About 15 days after the flowering of wheat poplar, from heading to flowering, 50-100 grams of 99% high-purity potassium dihydrogen phosphate and 10 grams of boron are sprayed with water to prevent scab, dry and hot wind, and premature aging of wheat, and can also play a role in resisting lodging and enhancing the fullness of wheat grains.

2. In the later stage of wheat planting, do not spray nitrogen-containing amino acids, urea and other foliar fertilizers, but spray phosphorus, potassium fertilizer and medium and trace element fertilizers, so as to prevent wheat from being greedy for green and maturing late. The principle of fertilizer selection and fertilization is to prevent premature aging and anti-greed, potassium dihydrogen phosphate can generally be used, and at the same time, it can be appropriately added to prevent diseases and insects and growth regulators such as brassinolide, which can be sprayed after being prepared with water to make a compound solution.

3. Watering should pay special attention to the weather, do not water in windy and rainy days, and grasp the amount of irrigation according to the soil texture to prevent lodging. Water the grouting water at the right time to resist the harm of dry and hot air.

2. When should the wheat be sprayed for the last time?

1. The last spraying of wheat can be carried out at the filling stage or the fruiting stage. Generally, 30% tebuconazole fomei double wettable powder (60 grams), chlorofluoropyramidoprid suspension (30 ml), brassinolide wettable powder (10 ml), potassium dihydrogen phosphate (100-300 grams) and liquid boron (20 ml) can be sprayed after mixing with 20 kg of water.

2. In summer hot weather, medicine should be applied before 10 a.m. and after 4 p.m.; Cool weather in spring and autumn should be sprayed after 10 a.m. and before 2 p.m.; In the cold weather of winter and spring, you should choose to apply medicine in the morning on a sunny day.

3. The efficacy of most herbicides requires a certain amount of soil moisture, and soil moisture is conducive to the exertion of herbicide efficacy when it is 40%-60%.

4. Do not use wheat herbicides in bad weather, the use of herbicides before and after heavy rain and before the arrival of cold air will affect the weeding effect on the one hand, and on the other hand, it is easy to cause pesticide damage.

5. Do not re-spray or leak wheat herbicide, the use of herbicide must be evenly sprayed, the weeds in the place of missing spray or less spray are unevenly treated, the control effect is not good, and the wheat is easy to turn yellow after re-spraying, which is easy to cause pesticide damage.