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Why do the lower leaves of peanuts have spots while the upper leaves are curled?
The preliminary diagnosis is leaf spot disease with a mixed occurrence of scab. It is recommended to spray the foliage with carbendazim, thiophanate-methyl, Aimiao, Score (difenoconazole), Daconil, Amistar, etc. It is best to select two chemicals and use them alternately, applying once every 5-7 days for 2-3 consecutive applications. At the same time, spray the foliage with potassium dihydrogen phosphate.
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Wheat stripe rust can be managed by a zone-based strategy of treating key spots to protect the wider area
Wheat stripe rust is a serious biological disaster that has long affected the safe production of wheat in China. In years when the disease is common, wheat yields are reduced by 10%-20%, and in years of severe epidemic, losses can reach more than 60%, or even leave wheat with almost no harvest. Based on a comprehensive analysis of factors such as the amount of inoculum, weather conditions and variety distribution, it is predicted that in 2011...
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What exactly is causing the spots on eggplant stems and leaves?
The small spots on eggplant leaves are lighter in the middle with dark brown edges, and the larger ones become irregular. There are also many small black dots on the lesions. Many leaf stalks have dark brown necrotic spots. After the stems are affected, dark brown lesions also appear, with dark brown edges and a lighter middle, and they are also densely covered with small black dots...
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Prevention and control methods for white spots on new leaves, dry leaves, curling and shrinking in Welsh onions
What to do when new leaves of Welsh onions have white spots, dry leaves, curling and shrinking? Many diseases and pests can cause dry yellow leaves in Welsh onions, including downy mildew, gray mold, Phytophthora blight, viral disease, seedcorn maggot, and others. Since spraying pesticides for downy mildew, gray mold, and Phytophthora blight had no effect, the Welsh onions are most likely affected by viral disease and damage from seedcorn maggot, which can be controlled according to...
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