Cucumber deficiency symptoms and prevention
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The copper-deficient internodes became shorter, the whole plant was clustered, the young leaves became smaller, the old veins lost green, and the leaves were thick green to brown in the later stage, and necrosis appeared, and the leaves were yellow. Chlorosis is the development from old leaves to young leaves. The control method applies 1~2 kg of copper sulfate per mu as the base fertilizer; the leaf surface is sprayed with 0.3% copper sulfate double solution.
Molybdenum deficiency is usually more severe in sandy soils, acid soils, and continuous cropping soils. The early symptoms of plant deficiency of molybdenum were similar to those of nitrogen deficiency, with slight yellowing between veins, and the leaf surface was uneven at the later stage, with thick and light, and dead spots appeared, the leaves were curled or the leaves were withered, and the new leaves were distorted. The method of control is to apply organic fertilizer, and apply lime to neutralize soil acidity on acidic soil. Based on molybdenum fertilizer, in the emergency, foliar spray can be applied 0.02%~0.05% ammonium molybdate solution
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