Tomato leaves withered
Answer: From the wilting symptoms of tomatoes mentioned by this farmer, it should not be bacterial wilt, because the bacterial wilt is like high temperature and high humidity. The current temperature and soil pH are not suitable for the disease.
Symptoms of wilting may also be tomato blight and tomato stem rot. According to the current climatic conditions, it is more likely that the stalks of tomatoes are rotted. Stem rot mainly damages the stem base of the tomato or the underground primary root. At the beginning of the disease, the cortex of the stem base produces pale brown and dark brown spots, and the lesions expand. Around the base of the stem, the stem base discolors and the cortex decays, the leaves turn yellow, and the plants gradually wilted. The surface of the diseased part of the late stage formed dark brown sclerotia and cut open the stem, showing that the xylem also turned dark brown. The dead leaves do not fall off, the diseased plants are removed, and the root system does not rot. The disease is a soil-borne disease caused by Rhizoctonia solani. The bacterium sclerotia is overwintering on the sickness and can be rotted in the soil for 2 to 3 years. The onset temperature is 24°C and the minimum is 13 to 15°C.
After the diseased plant was found, seed dressing double drug earth could be applied on the stem base. The specific approach is: use 40% of the seed dressing double wettable powder in accordance with the amount of 9 grams per square meter mixed with the soil made of medicinal soil, cover the pile in the diseased plant stems, buried the diseased department, promote long adventitious roots. It is also possible to use 40% seed dressing double suspension 800 times solution or 20% methyl lingering cream 1200 times spray. The focus is on spraying the stem base. You can also use 50% methadone WP to spread the stem base 200 times.
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