Why does the lotus root rot?
The disease is the rot disease of lotus root, which is caused by a variety of pathogenic fungi. The surface of the diseased lotus root is in the form of water stains, which can lead to the death of lotus root in serious cases, and the appearance of lotus root turns brown or black. when cut, you can see that the catheter near the center also turns brown. Continuous cropping in cultivation will aggravate the occurrence of the disease. The main control measures are: 1, implement 2-3-year rotation; 2, chemical control: 50% carbendazim powder plus 75% chlorothalonil powder 600 times spray plus stuffy seed, cover airtight for 24 hours, cool and dry after transplanting; when the disease occurs, choose Sukeling 1000 times or 64% disinfectant alum 800 times spray upper petiole, 7-10 days once, continuous control 2-3 times.
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The technique of planting lotus root with terminal bud
In recent years, some farmers in China have replanted lotus root with higher output value in some low-lying fields. According to the investigation, lotus plague (also known as rot disease) occurred in some lotus fields, which is the main disease of lotus root. In general, the yield of diseased fields is reduced by 20%, and the serious ones are up to 60%, 80%. First, harm symptoms: Lotus plague mainly harms the underground stem, making it brown and rotten, first.
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Identification and control of lotus root brown scab
Brown rot of lotus root is widely distributed and occurs everywhere, but it is only harmful to lotus root. 1. Pathogen: the disease is caused by the infection of Alternaria subphylum. The pathogen overwintered in the lotus root field with mycelium and thick spores, produced conidia at high temperature and humidity and spread by wind and rain. 2. Symptoms.
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