A: The decay of sweet potato during its storage period is mostly caused by pathogen infection. For example, black spot disease is the main disease that causes the bad potatoes in the storage period. The main route of transmission is potato seedlings, potato pieces and soil. Soft rot pathogens generally do not infect healthy tissues with strong vitality, and are easily invaded when the potato pieces are broken or suffer from cold damage. Soft rot bacteria are almost everywhere, and once the tuber's viability weakens, they will become ill. After the disease, the tubers become soft and watery and sticky. Afterwards, many filamentous and black spores grow on the surface of the tuber. Stem nematode parasitic potato, loose internal organization, black and white. All parts of the sweet potato, diseased body and soil can spread, can be overwintered in the soil, diseased potatoes are all infected in the field, the heavier potato rots have decayed at the time of harvest, and the incidence of lighter potato larvae in the storage period rot. Before storage, use 5% thiophanate-methyl WP or 25% carbendazim wettable powder 500-1000 times to dip the potato pieces for 10 minutes. After drying, put them into the kiln to prevent rot of the sweet potato during storage.
Imazalil is the commercial name of imazalil. It is a broad-spectrum fungicide and fruit preservative. It is used to prevent diseases caused by penicillium, green mold, and European bacterium, such as citrus and bananas. Penicillin, thiabendazole and other benzoyl imidazole drugs Penicillium, green mold has a special effect. The mechanism of action is to influence the permeability, physiological function, and lipid anabolism of the fungal cell membrane, thereby destroying the cell membrane and inhibiting the formation of mold spores.
It is understood that imazalil is mainly targeted at the fruit rot caused by Penicillium and green mold, which causes black rot, soft rot, and nematodes that cause rot in the storage period of sweet potatoes. It is recommended that thiophanate-methyl be used. Bacteria and other drugs to treat the potato block.
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