What's the reason why winter cucumber yellow
And yellow leaves of
Winter Angle spot, downy mildew, and other disease occurs, to suit the medicine, not careless use of drugs, in order to best control effect.
And yellow leaves water
Water in winter should pay attention to, want to choose the beginning of the continuous sunny water, don't catch up with the cloudy day after watering, once caught up with cloudy, because the ground temperature is low, easy to damage the root system, especially the water is too large, root damage is more serious, causing yellow leaves.So winter less watering, watering the num, bad days don't watering.
And yellow leaves fertilizer
Winter root growth is slow, low energy, absorbing ability is weak, fertilizer once too much, easy to root damage, caused the yellow leaves.So winter fertilizer there must be less, and the time interval.
And yellow leaves the adr
Because winter disease is more, some farmers friends for prevention and treatment of diseases, for the sake of a spraying prevention and treatment of disease, will mix together, pesticides and increased use of concentration at random, lead to the adr, and yellow leaves.So spraying in winter, it is not to be too much variety of pesticide mix together, the second is concentration is not too big.
And yellow leaves deficiency
Middle and upper yellow leaves are lack of iron, calcium, zinc and other elements.Middle and lower yellow leaves are short of magnesium, potassium, nitrogen and other elements.So to suit the spray the foliar fertilizer supplement relief in a timely manner.
And yellow leaves winter cucumber
1, timely supplement of potash (potassium dihydrogen phosphate and potassium is great), spraying on the leaf chelating calcium fertilizer, etc., may, when necessary, combined with water combined with spraying on the leaf.
2, should be timely maintenance of root system, promote root growth of fertilizer, in order to promote the roots to grow new root as soon as possible.
3, water to dilute concentration of soil solution for many times, after fertilization process to reduce the chemical fertilizer, to switch to full water soluble fertilizer, biological fertilizer increase or humic acid fertilizer, etc.
4, reducing frequency of spray insecticide or reduce spray insecticide concentration.
