Remedial measures should be taken as soon as possible.

@#@245@#@When growing and developing in winter and spring, wheat seedlings often appear yellow or even dead, but single fertilization cannot turn wheat green. Once yellowing occurs in wheat, if measures are not taken in time to remedy it, it may cause serious yield reduction of wheat.

Pest yellowing: wheat aphids and wheat spiders absorb leaf sap and cause yellowing of leaves, mainly occurring before and after winter. 65~75 ml of 40% omethoate emulsifiable concentrate can be sprayed on 50 kg of water per 667 square meters.

Yellowing disease: wheat sheath blight damage roots and stems, hinder the transport of nutrients and water and cause yellowing of wheat leaves. 20g of 12.5% graminol or 50g of 20% jinggangmycin can be sprayed on 50kg of water per 667 square meters.

Fertility deficiency yellowing: mainly occurs in poor soil fertility, serious shortage of base fertilizer plots, mainly yellow color, poor tillering ability, weak seedlings. In addition to applying organic fertilizer, this kind of wheat field should also apply appropriate amount of chemical fertilizer. 7.5~ 10kg urea and 30kg sulfur fertilizer were applied per 667 square meters, furrows were deeply applied, and 50kg water was sprayed with 1kg urea and 5ml foliar fertilizer per 667 square meters, which could promote the leaf color to turn green rapidly.