Target spot disease, commonly known as yellow spot disease, is mainly because it presents a small yellow water immersion spot at the beginning of the disease. Target spot disease is one of the main diseases of cucumber, which is harmful to cucumber. The following section of Huinong.com will tell you about the prevention and control measures of cucumber target spot disease.
Symptoms of target spot disease
In the early stage of the disease, the leaves of cucumber are mainly harmed, and the petiole and stem vines will be harmed in the later stage of the disease. In severe cases, the leaves of the lower part of the cucumber plant will die dry and enter the state of pulling, which will seriously affect the yield of cucumber.
Survival conditions and spread of target spot disease
The target spot disease will be parasitic in the winter, and the winter will be parasitic in the diseased plants and weeds. After the air temperature rises to 20 degrees in the second year, and the air is humid, it will spread through the wind and rain. Prevention of target spot disease is prevented by the survival conditions and spread of target spot disease.
Cucumber target spot control measures
The target spot disease can be killed when the temperature exceeds 55 degrees. Therefore, before sowing the cucumber, soak the cucumber in water at a temperature of 55 degrees for 10 minutes, then lower the water temperature to 30 degrees and continue to soak for 3 hours. In addition to killing the bacteria, it can also promote the sprouting of cucumber.
If conditions permit, it is best to rotate the target spot disease non-parasitic crops for two years, and also reduce the spread of target spot disease bacteria that are latent in the soil. When planting, it can be mulched and planted to cover the mulch, and small water irrigation should pay attention to ventilation and exhaust to improve the disease resistance of the plant. When a diseased plant is found, it is necessary to promptly remove the diseased plant and the fallen diseased leaf to the field to burn and reduce the source of infection.
In the high incidence period of target spot disease, the protective work can be done in advance, and the focus of the bactericidal drug on the middle and lower leaves of the plant can reduce the occurrence of target spot disease. When the target spot disease occurs, the bactericidal drug plus foliar fertilizer can be sprayed continuously for 2-3 days, spraying once every 7-10 days, while effectively killing the pathogen, supplementing the leaf nutrition and improving the disease resistance of the plant.
The above are the symptoms and prevention measures of cucumber target spot disease compiled by Huinong. The cucumber target spot disease mostly occurs in high temperature and high humidity environment. Therefore, when this weather is encountered during cucumber planting, the growers must It is necessary to do a good job in preventing target spot disease in advance.
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