Wheat herbicide remedy

There are many varieties of wheat herbicides , and their physical and chemical characteristics, action sites, and action principles are different. Therefore, the symptoms of phytotoxicity are also different, some are in the plant body, some are external, some are in the ground. Some are in the underground section.
First, the symptoms of phytotoxicity (a) 2,4 - drop herbicides (2,4-D butyl ester, 2 methyl 4-chlorosodium, etc.) in the case of excessive use and low temperature, will cause the leaves of wheat seedlings to chlorosis Yellowing, new leaves are onion tubular, curly ears, difficult to extract, emerging deformed ears. (2) When the dosage of oatmeal is too large before the wheat sowing, it will be absorbed by the wheat bud sheath in large quantities, resulting in a large swelling of the bud sheath, a headspace of the sheath, growth stagnation, and the leaves are dark green and dead after the emergence of the wheat. (3) Green merlon, chlorpyrifos, simazine and the like are all herbicides absorbed by the roots. When the dosage is too large or the spraying is uneven, the wheat exhibits a typical "green deficiency" due to inhibition of photosynthesis of wheat, that is, after the wheat roots are absorbed, the leaves of the wheat seedlings are greenish and yellow, which are like spots and fires. The plants are short, growing slowly until they are stagnant, and finally the affected plants are "starved to death" due to lack of nutrients. (4) The herbicide is applied before and after jointing of the wheat 3 leaf stage. China's pesticide network suggests that if the period of use is not appropriate, it can lead to the inner edge of the leaves, the plant is compact and straight, the leaves are dark green after the greening, the stems are straight and firm, the main stem and the leaves are thin, and the ear deformity is distorted as Portuguese. The shape is slanted, and the leaves form an onion tube. Excessive use of herbicides during the lush period of wheat growth, seedlings and vines, plants tilted or twisted. If the wheat spikes develop into the stamen and pistil differentiation stage, the serious development of the florets will be caused by severe disturbance and damage, which will lead to the unconsolidated wheat and severely reduced yield.
Second, the remedy for the remedy (a) should take the detoxification method as soon as possible. When the phytotoxicity has occurred or is about to occur, immediately start the irrigation and detoxification method, drain the poisonous irrigation water in the field, continue to flush with fresh water, or join the drainage and apply lime to neutralize the acidic herbicide in the field. Reduce phytotoxicity. For the phytotoxicity on the plant, the residual agent on the poisonous plant can be rinsed by spraying or spraying water to reduce the phytotoxicity. (2) Strengthening field management for the affected wheat fields. 2,4-Drip herbicides are not suitable for the application of wheat seedlings. When tubular leaves are found, it is necessary to increase the application of tillering fertilizers, increase tillering, and increase the rate of panicles to reduce the loss of phytotoxicity. In fertilization, you should pay attention to the application of organic fertilizer. Organic matter can adsorb herbicides, causing the herbicide to lose some of its activity, while also supplying nutrients to the crop to restore growth. (3) Using plant growth regulators to enhance wheat growth. Plant growth regulators can promote the growth of wheat, stimulate the growth and development of wheat, and also help to reduce the phytotoxicity. The pesticide network gives the commonly used detoxifying biological pesticides such as gibberellin, and the spraying of 2 grams per acre to 50 kilograms of water evenly sprays the wheat seedlings, which can stimulate the growth of the wheat seedlings and reduce the phytotoxicity.