Sorghum planting: what is sorghum purple spot disease?

What is sorghum purple spot? How to prevent and cure it? Please introduce that sorghum purple spot mainly occurs in the middle and later stages of sorghum growth, causing damage to leaves and leaf sheaths. The disease spot is purplish red, oval or oblong, mostly limited to parallel leaf veins, sometimes showing a lavender halo, gray mildew layer on the back of the disease spot on the leaf, and few mold layer on the leaf sheath. The pathogen of sorghum purple spot overwintered with hyphae or conidia in the remnant of the diseased plant, which was the source of initial infection in the second year. After the disease occurred in the field, the conidia on the disease spot were transmitted by airflow and re-infected repeatedly. The development of the disease is closely related to the climate, and the disease is serious in high temperature and rainy years. Prevention and control methods of sorghum purple spot: first, agricultural measures turn deeply in time after autumn and bury the diseased body deeply in the soil. In the later stage of sorghum growth, topdressing and phosphate fertilizer were applied in time to enhance plant disease resistance. Second, the artificial control of sorghum purple spot starts from the lower leaves and develops upward gradually. therefore, the elimination of 1 or 2 old leaves in the lower part of the plant as soon as possible is not only beneficial to ventilation and light transmission, but also reduce the infection of bacteria. Third, chemical control in the initial stage of the disease, choose 65% Dysen zinc wettable powder 600x leaf solution, or 50% methyl topiramate wettable powder 1000 times solution, spray 5075 kg per 666.7 square meters. Click to get more sorghum planting technology click to get more grain planting technology