Symptoms: During the flowering and ringing of cotton, the leaf color of the upper leaves of the main stem of cotton turns from pale yellow to dark green. The yellow spots appear between the green veins, and then turn brown, and the leaves shrink, become brittle, turn reddish-brown, and fall off. The bolls are thin and easy to prematurely decay, and the vascular end of the stems of cotton plants are not infested. Verticillium wilt The vascular end of the stem of the cotton plant was tan-brown.
Control methods: Increase cotton farmers' awareness of potash fertilizer application. Potassium fertilizer not only accelerates the differentiation of flower buds, reduces the shedding of budding bells, but also promotes the breathing of nitrogenous fertilizers by cotton plants, increases the function of cotton leaves, and produces stamina.
Control methods: Increase cotton farmers' awareness of potash fertilizer application. Potassium fertilizer not only accelerates the differentiation of flower buds, reduces the shedding of budding bells, but also promotes the breathing of nitrogenous fertilizers by cotton plants, increases the function of cotton leaves, and produces stamina.
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