Viola yedoensis leaf spot disease and its control

Occurrence of leaf spot disease in Viola yedoensis

Although Viola yedoensis is not very eye-catching, its flowers are actually very beautiful and have certain medicinal value. The plant is small, slender and beautiful. However, it should be noted that Viola yedoensis can still suffer from diseases, the most common of which is leaf spot.

Leaf spot disease of Viola yedoensis is mostly caused by a Ascomycete, a fungus that usually infects Viola yedoensis and causes lesions on its leaves. When leaf spot disease occurs, small yellow-brown spots will first appear on the leaves, and will gradually spread and expand to form larger black spots, and will cause the leaves to turn yellow, and even die in severe cases.

Prevention and Control of Leaf Spot Disease of Viola yedoensis

Generally, if leaf spot disease occurs on Viola yedoensis, it needs to be treated in time.

If you find spots on Viola yedoensis, it is usually infected with leaf spot disease, which can be treated with medication. Generally, 800 times the solution of Benomyl can be used for treatment. During treatment, foliar spraying is generally performed, and spraying is done once a week. Therefore, after 2-3 consecutive sprayings, the plant will basically be cured.

Other pests of Viola yedoensis

The common disease of Viola yedoensis is leaf spot, and the common insect pests are scale insects and whiteflies. Generally, if Viola yedoensis is attacked by diseases such as scale insects or whiteflies, it is necessary to spray pesticides to kill them. You can use 1000 times diluted 40% omethoate for spraying.