The persimmon tree is covered with persimmons, and the fruit growers see the joy of harvest. However, after a few days, the leaves of the persimmon tree turn red. Only the persimmon leaves are left in the tree for a week, and the leaves of the persimmon gradually turn red, soften or even fall off. What is it? What caused the reason? The following small series introduces you to the reason why the leaves of the persimmon tree are red:
Persimmon round spots, also known as persimmons, are one of the main diseases of persimmon trees. The disease mainly affects the leaves and infects the persimmon. In the early stage of the onset of the leaves, there are round small spots, the front is light brown, with no obvious edges. Later, it gradually expands into a round lesion, dark brown, light in the center, black in the periphery, red in the diseased leaves, yellow-green halo around the lesion. The lesions are generally 2-3 mm in diameter and up to 7 mm in diameter. When the disease is severe, the diseased leaves turn red and fall off within 1 week, leaving only persimmon fruit, and then the persimmon fruit gradually turns red and soft, causing a large amount of Fruit drop. The fruit is sometimes killed, resulting in yellow lesions, which are gradually reddish and the fruit quality is inferior.
The prevention and control methods mainly include: First, do a good job in the Qingyuan, winter and spring festivals, completely remove the dead leaves and persimmons on the fallen leaves and branches, and burn them in a concentrated way, deep burying or manure; second, strengthen cultivation management, enhance the tree potential, and improve Resistance to disease; Third, spray protection, sprayed 1:2-5:600 Bordeaux mixture in the middle of June (after persimmon tree flowering), or sprayed 65% Dyson zinc wettable powder 500 times solution, 50% Carbendazim WP 500 times solution, 36% methyl carbendazim suspension 400 times solution, and the like.
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