What if the wheat seedlings turn yellow?

Growing and developing to winter and spring, wheat seedlings often turn yellow or even wither, but wheat seedlings can not turn green by single fertilization. There are several phenomena of wheat seedling yellowing, if we do not take timely measures to remedy, it may lead to a serious reduction in wheat production.

Pest yellowing: wheat aphids and wheat spiders cause leaf yellowing caused by leaf juice, which mainly occurs before and after overwintering. For every 667 square meters, 50 kg of water can be sprayed with 40% omethoate EC 65-75 ml.

Disease yellowing: wheat sheath blight harms roots and stems, hinders the transport of nutrients and water, resulting in yellowing of wheat leaves. For every 667 square meters, 12.5% Heguoli 20 grams or 20% Jingangmycin 50 grams can be used for stem base spray control of 50 kg of water.

Lack of fertility and yellowing: it mainly occurs in the land with poor soil fertility and serious lack of bottom fertilizer, such as yellow color, poor tillering ability and weak seedlings. This kind of wheat field should not only apply sufficient organic fertilizer, but also increase the appropriate amount of chemical fertilizer. Apply 7.5kg urea and 30kg phosphate fertilizer every 667 square meters, and spray 50 kg of water with 1 kg urea plus 5ml Yemanbao every 667 square meters, which can make the leaf color turn green quickly.

Excessive density yellowing: uneven sowing or excessive sowing rate, so that too much population density in the wheat field will also lead to the yellowing of wheat seedlings. The remedial measure is to plant seedlings quickly and topdressing in time. If it has entered the jointing stage, it can be remedied by pressing seedlings.

Stiff seedlings yellowing: mainly occurs in clayey, low-lying fields. The remedial measures are to clean the ditch in time, eliminate waterlogging, reduce the groundwater level and field humidity, plough and loosen the soil in time, and apply available nitrogen fertilizer.