Wheat prosperous how to prevent and control
At present, it has been observed that wheat has a prosperous phenomenon. The harm caused by the prosperous growth of wheat: The biggest harm to the prosperous growth of wheat is the decrease of anti-freezing ability. Due to the prosperous growth of the young wheat seedlings, the number of stems is large, the sugar content at the tillering festival is insufficient, and the antifreezing ability is greatly reduced. In particular, the weak winter varieties are excessively prosperous, which leads to rapid differentiation of spikes. Before winter, they enter the two-legged or even spikelet and florets. It is possible that all winter wheat is frozen to death, resulting in the death of the crop. The second most prosperous cause is the massive consumption of nutrients and moisture. The third is the reduction of stress resistance. Due to the prosperous growth, the growth of seedlings is weak, the population is large, the ventilation and ventilation are poor, and the ability to resist drought and disease and insect pests is reduced.
Different prosperous types of control methods: 1. Prosperous seeding type is too large. In general, the seeds of wheat sown on October 5th have more than 18 pounds/mu of seed for the multi-spike varieties and 23 pounds/mu for the big ear-type varieties, which basically belongs to excessive seeding volume. This type of performance is characterized by crowded wheat seedlings and slender leaves. For this type of wheat control methods, in principle, sparse seedlings, deep cultivators, and control of fertilizers and waters should be adopted, and moderate overgrowth should be carried out to suppress the growth. When the repression should be taken in a direction, it should not be repeatedly suppressed. Without timely treatment, due to the crowded wheat seedlings, poor light transmission, poor air permeability, and delicate young wheat seedlings, young seedlings will grow rapidly in order to win glory, and large amounts of nutrients will be supplied to the new leaves. The sugar content stored at the tillering festival will be reduced, and the antifreeze capacity will be greatly reduced. Even if it is safe to winter in warm winter conditions, the danger of lodging will increase in the coming year.
2. Fertilizer is too large and prosperous. The sowing date was appropriate after October 5th, but due to the excessive nitrogen fertilizer, the wheat seedlings grew wildly. In this case, root cutting or repression should be adopted to moderately control the fertilizer and water.
3. Variety of weak winter varieties. Because the winter and spring characteristics of the varieties are very different, generally speaking, the stronger the winter, the slower the pre-winter development process, the better the anti-freezing ability. For some of the winter strong spring varieties, early panicle development has reached the Erlang period, even to the spikelet, floret differentiation period. Pre-winter wheat entering the Erlang period has a higher mortality rate in winter.
Chemical control measures for wheat prosperous growth: Some chemicals have good control over wheat prosperous growth, such as paclobutrazol, which not only inhibits, but also has a certain effect against the prosperous wheat. However, the use of chemicals to control the prosperous growth of wheat must be strictly controlled according to the instructions to control the concentration of pesticides. After years of use, we must pay attention to the development period of wheat. Because these physiological regulators are different from insecticides, they are more sensitive to the concentration, and they are particularly sensitive to such pesticides during the development of wheat ear. Once phytotoxicity occurs, it is difficult to take effective measures to reverse it. Therefore, a measuring cylinder should be used when using this type of medicine.
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