What precautions should be taken for pre-winter weed control in wheat?
Weed control before wheat overwinters has many benefits. First, the cost is low; second, when chemicals are sprayed in winter, the exposed area of weeds is large, which helps weeds absorb more of the chemical and achieve a better weed control effect. Moreover, the earlier weeds are controlled, the more beneficial it is to wheat growth and development and to the formation of strong seedlings. However, several pitfalls should also be noted when controlling weeds before winter. Let's take a look.
1. Correctly choose the type of chemical
Before weed control, the first thing is to choose the chemical. Only by choosing the corresponding chemical in a targeted way can weed control achieve twice the result with half the effort. For example, for wheat fields dominated by broadleaf weeds, dry suspension concentrate Kuaimieling or wettable powder products in the bensulfuron-methyl series can be used; while for malignant grassy weeds, fenoxaprop-P-ethyl emulsifiable concentrate or Shima oil suspension concentrate should be chosen.
2. Correctly choose the spraying time
Knowing when to spray is also a science. Three things should be observed. First, look at the seedling emergence situation. Seedlings at the 3-4 leaf stage have a certain tolerance to herbicides, so spraying at this time can ensure the safety of wheat seedlings, and at this time wheat has few tillers, which helps weeds absorb the chemical. Try to avoid spraying at low temperatures. Second, look at soil moisture. If soil moisture is poor, be sure to increase the amount of water used when applying the chemical; third, look at the weather conditions. When applying the chemical, try to choose weather with a stable temperature of 8-10 degrees and no wind or rain.
3. Do a good job of secondary dilution
Herbicides for wheat fields must use secondary dilution. First, use a small amount of warm water to dilute evenly in a small container, then pour it into the sprayer, add enough water, shake well, and then spray. Otherwise, a mottled "flower face" phenomenon will occur.
4. Do not miss spraying or spray repeatedly
Before spraying the chemical, check and repair the spraying equipment well to ensure it operates normally, and resolutely eliminate dripping, leaking, clogging and similar problems. Operators should move forward at a uniform speed to prevent missed spraying or repeated spraying.
The above is an introduction to the precautions for pre-winter weed control in wheat. We hope it can help you. To learn more related knowledge, please stay tuned to us.