As temperatures rise, is wild wheat suitable for spraying? What are the issues to be aware of
The rain and snow have stopped, the sun is shining, from the meteorological report, many places have shown signs of warming, and the temperature is gradually rising at the same time, wheat will also usher in the regreening period, in the whole life cycle, the regreening period is a very critical part, therefore, the management of the regreening period of wheat, including weeding, control, disease prevention, water and fertilizer and a spray of three prevention. Some people asked, can wild wheat be sprayed as the temperature rises these days? What should I pay attention to? Let's take a look.
With the continuous cultivation of wheat and maize, the amount of wild wheat in the field is not only increasing year by year, but also becoming more and more resistant. It is well known that spraying wild wheat is sensitive to temperature, humidity and climate (it needs to be very high), but for various reasons, wild wheat was not sprayed last year, so many people do not know the exact time for next year. Wild wheat is just a general name, and there are three kinds of common wild wheat: finch wheat, oats and knotweed, and the spraying time of wild wheat should be from the beginning of the growth of wheat seedlings to the time of germination.
According to the meteorological report, in March, the temperature will gradually rise, and the maximum temperature will be above 11 degrees Celsius. As for whether you can spray or not, it depends on whether you meet these three points. First, wheat should be returned to green in advance; 2. It cannot exceed the jointing period (generally before germination); 3. The minimum temperature for five consecutive days shall not be less than 2 degrees, and the maximum temperature shall not be less than 10 degrees, and there shall be no bad weather such as low temperature, low temperature, rain and snow.
Because wild wheat (especially knotted wheat) and wheat are "close relatives", and the most commonly used agent is methyldisulfuron, which has a good control effect on knotted wheat, but it is easy to cause pesticide damage to crops in the process of prevention and killing. However, wheat itself has an "enzyme" that can detoxify, and high temperature can alleviate the damage caused by methyldisulfuron, but a drop in temperature or a sudden drop in temperature will lead to toxicity in plants, so in the process of preventing wild wheat, we must avoid bad weather such as sudden temperature drops, rain, snow and frost.
And, to prevent wild wheat from being sprayed too much, some people feel that too much pesticide is wasted, but they don't know that overspraying can cause more damage. At the same time, yellow and weak seedlings should not be sprayed, only strong seedlings can be sprayed, and can not be mixed with other drugs to spray, should be sprayed separately. If the only wheat in the wheat is finches, then fluasulfuron can be used, and if both wheat and oats are available, then alkyl esters need to be added. If there are arthrodes, finch wheat and oats, fluzosulfuron and alkynyl ester can be mixed with methyldisulfuron-methyl and sprayed, and the effect is better.
After the Chinese New Year, everyone should know that the current wild wheat has only played a certain role in curbing it, and it is not as good as last year. In addition, wild wheat can not be sprayed after the jointing period, according to our regulations here, spray wild wheat on March 5-March 20, and spray wild wheat on March 5-15 days, spray at noon when the temperature is high, and wild wheat can not be sprayed after the spring equinox, otherwise it will cause pesticide damage and will have an adverse impact on the normal growth of wheat.
In short, whether wild wheat can be sprayed after the temperature gradually warms up should be carried out according to the requirements of spraying, and attention should be paid to temperature, humidity, weather and other issues. In addition, it is important to see what kind of wild wheat is used, and then time it to spray it in a way that can achieve the desired results without any impact on the wheat. Do you remember, my friend?