Answer: According to the symptom description, it is judged that this is due to the deficiency of magnesium caused by lack of cucumber disease, which is a kind of 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 are: when cucumber enters the stage of fruiting, the green color of the lower leaves and veins gradually turns yellow, and further development, with the exception of leaf veins and leaf margins, the mesophyll between the veins becomes yellowish white or dark beige. color. Finally, the leaves dry and die. The method of preventing cucumbers from lacking magnesium is: Scientifically formulating fertilization. If the diagnosis is magnesium deficiency in the soil, sufficient magnesium-containing compound fertilizer should be applied 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 compound microelement fertilizer containing magnesium on the leaves, once every 7~10 days, 2~3 times in succession. Foam Dressing,Soft Elastic Waterproof Foam Dressing,Breathable Foam Dressing,High Absorbency Trauma Foam Dressing Zhende Medical Co.,Ltd , https://www.zhendemedicals.com
Inquiries: Consultation with a farmer friend, the leaves of greenhouse cucumber leaves start to appear macular, then turn white, dry, according to the control of keratoses method to fight drugs, does not work, ask this is how is it? How to prevent it?