Home › Nursery Stock › Article

What are the control methods for Dianthus leaf spot?

Nursery Stock 0 views
Identification points: Dianthus leaf spot mainly affects the leaves. Leaf spots are initially yellow, gradually becoming dark brown round to oval spots, and later the spots turn grayish brown with dark brown edges; in severe cases the spots join together, causing the leaves to turn yellow, wither and drop early. Under humid conditions, many small black granules appear beneath the spots, namely the conidia and conidiophores of the pathogen. Occurrence characteristics: a fungal disease. It can occur year-round in greenhouses. Under conditions such as abundant rain, heavy fog and heavy dew, the disease occurs easily. Poor ventilation and light transmission, extensive management and weak plant growth can all

Identification points: Dianthus leaf spot mainly affects the leaves. Leaf spots are initially yellow, gradually becoming dark brown round to oval spots, and later the spots turn grayish brown with dark brown edges; in severe cases the spots join together, causing the leaves to turn yellow, wither and drop early. Under humid conditions, many small black granules appear beneath the spots, namely the conidia and conidiophores of the pathogen.

Occurrence characteristics: a fungal disease. It can occur year-round in greenhouses. Under conditions such as abundant rain, heavy fog and heavy dew, the disease occurs easily. Poor ventilation and light transmission, extensive management and weak plant growth can all aggravate the disease.

Control methods: (1) Promptly remove diseased leaves and burn them to reduce sources of infection. (2) In the early stage of the disease, spray with 50% carbendazim wettable powder at 600-800 times dilution, 25% bromothalonil wettable powder at 1000 times dilution, or 20% propiconazole emulsifiable concentrate at 2000 times dilution.

Related Articles