At the same time there are symptoms of deficiency

Anthracnose is mainly harmful to the leaves, the lower part of the leaf is more frequent. First from the leaf edge or leaf tip onset, the spot along the main vein expansion, brown or dark brown, from the tip of the leaf invasion of the spot along the main vein expansion of cuneate, long elliptic or irregular;

from the leaf edge of the invasion of the lesion is semicircular or long semicircular, the lesion is brown or dark brown, there is an inconspicuous whorl, the edge of the yellowish-brown, the lesion is bearing a lot of inconspicuous small black dots, that is, the disease fungus conidial disk, humidity is high when the small black dots turn into Vermilion dots, with a magnifying glass to see also hidden black bristles.

This disease is not easy to distinguish from spotted wilt, if there are prickly hairs or red dots, that is, anthracnose of peanut.

The prevention and control methods ① heavy disease areas pay attention to the selection of disease-resistant varieties; the implementation of crop rotation; the removal of diseased plant residues, deep turning of the land; to strengthen the cultivation management, reasonable dense planting, increase the application of phosphorus and potassium fertilizer, clearing ditch drainage.

② Combined with other leaf spot disease early spray preventive control, can choose: 25% bromoxynil wettable powder 600 times, or 40% fusilazole emulsion 5000 times, or 30% benzyl - propiconazole emulsion 3000 times, sprayed 2 to 3 times, every 7 to 15 days to spray a time.