Prevention of wild wheat "reach" is effective

August 04, 2023

With the emergence of remote mechanized operations in recent years, the number of weeds in the wheat fields has gradually increased, not only the original leeks, sowing wormwood, wheat bottle grasses, but also wild wheat (bread or wild oats). Since these grassy weeds are not much different from wheat seedlings, they also raise the threshold for the agents that control them.

According to the author's understanding, there are only a few pesticides used for the prevention and control of wild wheat registration in China, among which the tiger, priority, and Shima are the main ones. However, in the past two years, the pharmaceuticals for the control of wild wheat have mushroomed in the market and are often dazzling. .

According to experts in agriculture, wheat is in the so-called "weaning period" during the period of 2 to 3 leaves, that is, the nutrients in the wheat species have been consumed, and the nutrients absorbed by the roots are still not able to meet the nutritional growth of the wheat seedlings. If herbicides are sprayed when the standard for controlling wild wheat is not achieved, there will be different degrees of phytotoxicity.

1. If the age of wheat seedlings does not reach the level of three leaves (ie wheat tillers), light causes death of wheat seedlings with varying degrees of death. In severe cases, all deaths can cause complete death and destructive crops, reducing production by 30% to 80%.

2. If young wheat seedlings are young, spraying pesticides will reduce the tillering power of young wheat seedlings in the previous year, and will increase the number of stand-alone trees in the coming spring, returning to late-greening, small spikes, and early earing.

3. When the dosage is too large, the spraying period is not right or the spraying is not uniform, the wheat exhibits a typical “green chlorosis” by inhibiting the photosynthesis of wheat. After the wheat root absorbs the herbicide, the leaves of the wheat sprouts retreat. Yellow, like patches, burns, the plants are short, grow slowly until they stop, and finally the victim is starved to death due to lack of nutrients.

4. Applying before and after the 3rd leaf stage of wheat can cause the leaf margins to roll in, the plants are compact and straight, the leaves are dark green after turning green, the stems are straight and hard, the main stem and leaves are thin, and the ear deformity is distorted. The grapes are tilted and the leaves generate onion tubes. Excessive use of Baicao Enemy during vigorous growth of wheat results in seedling emergence and plant tilt or bending. If wheat ear development enters the stamen and stamen differentiation stage, severe disruption and disruption of wheat development will result in the failure of wheat earing and severely reduce yield.

According to experiments, when adding 3 ml of love or 15 ml of chlorophyll per barrel of water to control wild wheat, not only can the release of phytotoxicity also promote the return of wheat seedlings to young people in the next year, increase the ability of winter antifreeze, and resist the cold of the next year. Wheat lays a solid foundation for high yields.

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