There is a high risk of wheat lodging in the later stage of this year.

The return to green period of wheat is generally threatened by drought this spring, and irrigation is actively carried out in various places from rising to jointing stage. in addition, there are more precipitation, higher temperature and less light before and after jointing, resulting in the basal stem of the current wheat after jointing. In particular, the longer first and second internodes, thinner stem walls and poor development will lead to the upward movement of wheat plant center of gravity and increase the risk of lodging in the middle and later stages. It has become a hidden danger of production safety that can not be ignored. A peasant proverb says: a handful of bran is poured into the grain and a handful of grass is poured from wheat. If lodging occurs in wheat, it will not only cause serious consequences of yield reduction and poor harvest, but also cause a series of troubles such as difficult mechanical harvest, greedy green and late ripening in production. Therefore, in the field management of wheat in the middle and later period of this year, we should highlight the problem orientation and take the following effective measures to deal with it:

First, water carefully to prevent lodging. The growth and development of wheat is exuberant after jointing, and it needs water and fertilizer. Especially from booting to heading stage is the critical period of water requirement for wheat, and drought has the greatest effect on wheat yield. The water consumption from flowering to maturity accounts for 1. 4% of the total water consumption in the whole growth period. Therefore, it is necessary to timely irrigate the flag-raising water or grouting water according to local conditions, so as to ensure the physiological water use of wheat and resist the harm of dry and hot wind at the same time. But watering should pay special attention to the weather, not in windy and rainy days, but also according to the soil texture to control the amount of irrigation to prevent lodging.

Second, it is necessary to apply fertilizer carefully to prevent late ripening. After jointing, foliar fertilizer spraying can generally be used to supplement the fertilizer demand of wheat. The principle of fertilizer selection and fertilization is to prevent not only premature senility, but also greed. This year, wheat, especially late-sowing wheat, should not be sprayed with foliar fertilizers such as nitrogen-containing amino acids and urea, but should be sprayed with phosphorus, potash, and medium and trace element fertilizers, as long as the leaves are not yellowing and nitrogen deficiency or special wheat cultivation is carried out for strong gluten. The aim is to prevent wheat from becoming green and ripening late as soon as possible. Generally, potassium dihydrogen phosphate can be used, and growth regulators such as disease prevention and insect control agents and brassinolide are added to prepare a compound solution with water. There is often imitation potassium dihydrogen phosphate on the market, which is actually a ternary compound fertilizer, and the nutrients contain nitrogen fertilizer, so we should pay attention to it when buying and using it.

Third, it is necessary to do a good job of "one spray and three precautions" as soon as possible. To achieve timely response, early prevention and early control, prevention and prevention. The overwintering base of diseases and insect pests in warm winter last year was relatively high, resulting in the early occurrence of some diseases and insect pests in wheat this year. It is expected that wheat ear aphid, red spider, midge, scab and powdery mildew may be prevalent. Therefore, "one spray and three prevention" should start early before flowering according to the actual occurrence of diseases and insect pests in the field. Pay attention to spraying evenly to prevent drug damage; strictly abide by the safe operation rules for the use of pesticides, do a good job in personnel protection and prevent pesticide poisoning; do a good job in cleaning pesticide application equipment, recycling waste materials such as pesticide bottles and bags, and pay attention to agro-ecological safety.