Remedial measures for yellowing and wilting of wheat leaves

70% isoproturon was sprayed on wheat, and the cold wave occurred on the third day after the medicine, and now the wheat leaves are yellow and withered. I would like to ask whether it can be recovered after a period of time and is there any remedial measures?

Isoproturon will reduce the frost resistance of wheat seedlings, and wheat seedlings are vulnerable to frost injury in severe frost weather after application, that is, "freezing injury" occurs. After the occurrence of frostbite, when the wheat seedlings are more tender green or seriously damaged, the frostbite site first shows the shape of boiling water scald-like water stains, and then the loss of water dries up and whitens; when the wheat seedlings are more healthy or less damaged, the leaves are more yellowing symptoms.

If the wheat seedlings in the above-mentioned fields show symptoms such as yellowing of leaves, it is caused by the "freezing injury" of isoproturon, and the wheat seedlings can recover later when they are lightly damaged; if the wheat seedlings are seriously injured, especially when the seedlings are young, the phenomenon of dead seedlings may occur. After frostbite, the water loss of wheat leaves is fast, if the soil is dry, dry freezing is easy to occur, and the death of seedlings is more serious. When the soil is too dry, especially when the seedlings are young, it is appropriate to irrigate or water properly after freezing injury (wheat leaves or soil can not be irrigated or watered when freezing), or properly covered with straw and other heat preservation, which is beneficial to the protection of seedlings.

At the same time, measures such as supplementary application of fertilizer were taken according to the damage of wheat seedlings in the field. If the damage of wheat seedlings is not too serious, special management and protection measures can not be taken; if the freezing injury is heavy or even the seedling death rate is high, appropriate fertilizer should be added to promote the tillering and population recovery of wheat seedlings according to the application of fertilizer in the early stage. if necessary, spraying humate foliar fertilizer can promote the recovery of wheat seedlings, and where there are many seedlings, wheat seedlings can be sparse and replenished before and after the 5-leaf stage of wheat.