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Symptoms: Seedlings are killed. When the damage is early, the seedlings will rot without unearthing; sometimes the base of the newly emerged young stems will be browned and brown, the cotyledons will sag and droop, and finally the seedlings will die, and the stems will be cut open. The catheter will turn yellowish brown or dark brown (other than other diseases). .
The incidence of adult leaves. In some cases, the lower leaves are chlorotic and plaque-like. The diseased leaves turn yellow, and then turn yellow and brown, and develop upwards. When there is mild wilting or high temperature at noon, it is wilting (typical symptoms). After morning or evening or after watering, It can be restored, and it will not recover after development. It will gradually turn yellow-green to yellow-brown from bottom to top, and finally the plants will die. Some of the diseased leaves did not turn yellow, appeared wilting, and recovered sooner or later. After a few days, the whole plant was wilted and the leaves were normal.
Prevention:
1 Select resistant varieties. The selection of resistant varieties, grafting cultivation.
2 seed treatment. Seeds were collected from disease-free land, or dried seeds were treated with warm water at 75 ° C for 12 hours. It can also be soaked with 0.1% of 60% carbendazim hydrochloride ultrafine powder + 0.1% flat solution for 1 hour, or 40% formaldehyde 150 times.
3 beds of soil treatment. Use a new seedbed that has not been planted with melons, or a field seedling. For the old seedbed, use 50% carbendazim wettable powder or 70% dikesone wettable powder, 8-10 grams per square meter, and mix well with 5 kilograms of fine soil for padding and cover soil.
4 strengthen management. Implement a 3-5 year rotation. Apply enough organic fertilizer, do not apply nitrogen fertilizer, deep turn the land, do not hurt the root when transplanting, do not burn root when applying fertilizer, do not flood the water, do not make the soil too dry, cultivating loose soil, timely tying vines, snoring, Weeding, high ridge or semi-high ridge cultivation, mulching, found that individual strains were immediately removed and smashed with lime powder.
5 soil disinfection. The field soil can be sterilized by high temperature or disinfected with chemicals. For example, use 50% carbendazim wettable powder 2.0 kg per mu, or 70% dikesone wettable powder 1.5 kg, add 50-100 kg of fine soil to mix evenly, disinfect the diseased soil, or apply it in the seeding ditch or colonize In the ditch, then plant or plant the seedlings.
6 irrigation root: before the onset or before onset, use 60% anti-mildew WP 600 times solution, 70% dikesone WP 600-800 times solution, 50% methyl thiophanate WP 500 times solution, 50% benomyl WP 1000-1500 times liquid, root disease 500-600 times liquid and other root irrigation, 250 ml per plant, 7-10 days irrigation, continuous irrigation 2-3 times, can also be used The combination of dry and WP can be combined with early treatment.
7 Smear: When the base of the stem is longitudinally split, the stem is coated with 70% dick pine powder and 50% carbendazim WP 200 times.
Cucumber wilt disease prevention and treatment
Cucumber wilt, also known as wilt disease, and some are dead rickets, which are soil-borne diseases. It can be harmed throughout the growth period, mainly at the base of the stem during the melon period.
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