Cucumber leaves whitish

A: This is because of the lack of magnesium caused by cucumber deficiency disease, is a physiological disease. Magnesium is the core component of the plant chlorophyll composition, and it has an important influence on fruit ripening, fruit size and quality. The typical symptoms of magnesium deficiency: cucumber enters the period of melon growth, and the green color in the lower leaves and veins gradually turns yellow. In addition to the residual green color in veins and leaf margins, the leaf part between veins also turns yellow-white or dark yellow-yellow, and the last leaf Dry, dead. The method of preventing and treating magnesium deficiency in cucumber: Scientific formula fertilization, such as the diagnosis of magnesium deficiency in soil, must be applied with enough magnesium-containing compound fertilizer before the cucumber is transplanted and planted. The emergency measures for the symptoms of magnesium deficiency during the growth of cucumber are: spraying 1%~2% magnesium sulfate aqueous solution or composite microelement fertilizer containing magnesium on the leaves once every 7~10 days for 2~3 times in succession.

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