Will the potato tubers still swell?
Tuber formation period is a period of tuber formation and rapid expansion, and the water consumption in the peak tuber period accounts for more than half of the total water demand in the whole growth period. It is appropriate to keep the soil water content up to about 70% of the maximum water capacity in the field, that is, to lift it into a ball and scatter one meter from the ground.
In the later stage of tuber, that is, from one week to 10 days before harvest, irrigation should be stopped to facilitate the harvest.
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Occurrence and control of potato tuber rot nematode
Fengning and paddock counties in the north of Chengde City grow more than 40, 000 hectares of potatoes a year, produce more than 800 million kilograms of seed potatoes and commercial potatoes, and store about 120 million kilograms of potatoes in winter. it is one of the four major potato production graveyards in the country. In recent years, due to the damage of potato tuber rot nematodes, the loss of stored potatoes was 5%-7% in 1994, and that of seriously damaged potato cellars was as high as 20%-30%. According to the data retrieved at present, this nematode is widely distributed in potato species in Asia, Europe, America and Africa.
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Rhizoctonia solani of potato
(pathogen name) RhizoefoniasolaniK ü hn (host crop) Solanaceae, Leguminosae, Gramineae and other crops have a wide range of hosts. (disease diagnosis) mainly harms buds, stem bases and tubers. Young buds infected with disease, ununearthed cause rot, the formation of bud rot, resulting in lack of seedlings; unearthed infected, the lower leaves began to yellowing, the base of the stem produced brown sunken spots, the size of 1 cm to 6 cm. The lesion and its surroundings are often covered with purple mycelium; sometimes there are different sizes at the base of the stem and on the tuber.
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