Symptoms of iron deficiency in peanuts show chlorosis of the upper young leaves, while the old leaves and veins of the lower part remain green; when the iron deficiency is severe, the leaf veins lose their green and yellow, and all the new upper leaves turn white, causing brown spot necrosis and dry up. And shedding.
Control methods can use 0.1% ~ 0.2% of ferrous sulfate solution for foliar spray, spray every 5 to 7 days, can be sprayed 3 to 4 times, in order to enhance leaf adhesion, can be added 0.1% Washing powder to improve the spraying effect and enhance the absorption function of the leaf surface. Can also choose to use yellow leaf enemies, its main ingredient is iron chelate and some trace elements, spray effect is better than simply sprayed ferrous sulfate, generally use 20 ml per mu watered 15 kg, every 10 days Spray once, continuous spraying 2 ~ 3 times the best effect.
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