Dry rot may occur from budding to fruit ripening, and the peak period is from May to June. The flower, pedicel and fruit are harmed when the disease is serious, and the pomegranate flower will fall off in advance when the disease is serious. The diseased part is gray black, soft, gradually dehydrated and dried. In the later stage, there will be many small black spots, resulting in fruit rot.
Strengthen the maintenance, increase the application of P and K fertilizer to improve the disease resistance of pomegranate.
Clean and prune the diseased branches and rotten fruits in time to avoid bacterial infection. Keep warm and avoid frostbite in winter.
In case of any disease, the infected plant shall be removed in time, and the mixture of sulfur and stone shall be sprayed. During May August, 1:1:160 Bordeaux solution shall be sprayed once every 15-20 days.
Coal pollution mainly damages leaves and fruits. Black hyphae will appear in leaves and fruits, and a layer of bituminous coal will stick to leaves, which will affect photosynthesis. The main inducement of coal pollution is the feces and secretions of insects, which occur in the environment of poor ventilation, high temperature and large humidity.
During maintenance, trim properly, ventilate timely, ensure good light transmission, reduce humidity properly, and avoid sultry environment.
Do a good job in prevention, during the winter of pomegranate, spray the mixture of sulfur and stone to eliminate the source of disease. Spray Omethoate 1000 times solution in time to prevent and control pests.
When the plant is ill, spray 500-800 times of Daphne, 4-5 times.
Pomegranate brown spot is a kind of fungal disease, which mainly damages leaves and fruits, leading to falling flowers and fruits. After the leaves are damaged, small brown spots appear at the initial stage, and gradually spread into a round shape, with black edges. The back of the leaves will also be covered with disease spots. There will also be dark brown spots on the fruit, and the outer edge of the spots is yellowish white after coloring.
Remove the sick leaves and dead branches in time and burn them intensively to reduce the source of bacteria.
Strengthen the maintenance, water reasonably, keep the pot soil slightly wet, and enhance the disease resistance of the plant. Before germination in spring, spray the mixture of 5 degrees of carbomer and 140 times of Bordeaux solution after germination of new branches, and take preventive measures. Spraying began in late May, 6-8 times every 10 days.
