Yellow seedlings should take early remedial measures
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Wheat growth and development to the winter and spring season, wheat seedlings often appear yellow and even death of the view, and rely on a single fertilization can not turn green wheat. Once yellowing occurs in wheat, if no measures are taken to remediate it, serious wheat production may be caused. Insect pests yellow: Wheat leaves and wheat spiders draw yellow leaves from the leaf sap, mainly before and after the wintering period. Per 667 square meters available 40% omethoate EC 65 ~ 75 ml of water for 50 kg spray control. Yellowing of disease: Wheat sheath blight damages roots and culms, impedes the transportation of nutrients and moisture and causes yellowing of wheat leaves. Each 667 square meters can be used 12.5% ​​wolfberry fruit 20 grams or 20% Jinggangmycin 50 grams 50 kilograms of water stem-based spray control. The lack of fertility yellow: Mainly occurs in the soil fertility is poor, a serious shortage of base fertilizer plots, mainly yellow color, poor tiller, weak seedlings. In addition to the application of organic fertilizer in such wheat fields, it is necessary to increase the appropriate amount of fertilizer. Urea urea 7.5 to 10 kg per 667 square meters, 30 kg of sulphonic fertilizer, deep ditching; every 667 m2 of urea plus 1 kg of foliar plus 5 ml of foliar water for 50 kg of foliar spray, can promote the rapid conversion of leaf color green. The density is too large and yellow: uneven sowing or excessive sowing, so that the density of wheat fields too large will also lead to yellowing of wheat. The remedial measures are rapid seedlings and timely fertilizer. If you have entered the jointing period, you can take the pressure seedling method to remedy. Yellow seedlings: mainly occurs in clay soils and low-lying fields. The remedial measures are to clean up the ditch in time, eliminate waterlogging, reduce the groundwater table and the humidity in the field, timely cultivating loose soil, and topdressing available nitrogen fertilizer.