MySheen

Control of rhododendron mosaic spot

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, The symptoms mainly infected the leaves. In the early stage of the disease, small reddish-brown spots appeared on the leaves, which gradually expanded into disease spots or irregular polygonal spots, dark brown. In the later stage, the central tissue of the lesion turned gray. When the disease is serious, the disease spots are connected to each other, resulting in withered and yellow leaves and early fall. Prevention and control methods 1. The fallen leaves were removed and treated in autumn, and the diseased leaves were removed in time during the growing season. two。 The planting or potted flowers should have a suitable density, ensure the ventilation and light of the plants, reduce the leaf humidity, and put the potted flowers in the outdoor shade shed in summer to reduce sunburn and machine.

The symptoms mainly infected the leaves. In the early stage of the disease, small reddish-brown spots appeared on the leaves, which gradually expanded into disease spots or irregular polygonal spots, dark brown. In the later stage, the central tissue of the lesion turned gray. When the disease is serious, the disease spots are connected to each other, resulting in withered and yellow leaves and early fall.

Prevention and control methods 1. The fallen leaves were removed and treated in autumn, and the diseased leaves were removed in time during the growing season. two。 The density of planting or potted flowers should be suitable to ensure that the plants are ventilated and transparent, reduce the leaf humidity, and put potted flowers in the outdoor shade shed in summer to reduce the wounds caused by sunburn and mechanical damage. 3. Immediately after flowering, 65% Dyson zinc wettable powder 500 Mel 600 times or 50% carbendazim wettable powder 500 Mel 800 times were sprayed. Spray every 10 Mel 14 days for 3 times in a row.

 
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