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Sweet pepper sclerotium disease and epidemics have what distinction, how to control?

Posttime:2017-07-31   Visits:12
核心tips:In the autumn delay in sweet pepper cultivation management, engraftment after death phenomenon of disease, and sclerotin
In the autumn delay in sweet pepper cultivation management, engraftment after death phenomenon of disease, and sclerotinia blight occurred serious two kinds of diseases.Difficulties because of the difference between these two diseases, many farmers friends often mixed frost mildew and on the sea for prevention and control of spray or filling root, but the effect is not obvious, in order to correct the difference between two kinds of disease, achieve timely prevention and control, reduce the mortality rate, the following two kinds of disease symptoms would be cent fold.

Sweet pepper sclerotium disease and epidemics have what distinction, how to control?

The similarity

These two kinds of disease symptoms are water bad phenomenon, and long white hair, this is the main factor is difficult to distinguish two kinds of disease.

Sclerotium disease symptoms

The disease is mainly to harm the pepper stem base, mainly in 5 to 18 centimeters off the ground stem and branches, the early onset of disease department seems to talk about brown disease spot with particular shape, after the gradual development are pale, and to the top and bottom stem development.Humidity is big, the disease of raw white mycelium, stem cortex mildew, grow a black sclerotium ShuFen shape at the same time, cut the disease of vascular bundle does not change color.The disease process is longer, not killing plants wilting in the short term, in the autumn delay pepper engraftment general 10 ~ 15 days after the start.

The disease symptoms

Disease mainly pepper stem base, it is the early onset of disease of water damage, discoloration, gradually expand the germs, stem base tan, constriction, black rod.The growth of the disease when humidity is big white mildew layer.And illness downward extension, bell pepper root, cut browns disease of vascular bundles.Since engraftment after the onset of the disease, killed a few days internal energy plant wilting.

In the fruit

Sweet pepper sclerotium disease and epidemic disease not only harm stems, leaves and fruits.Fruit dye sclerotinia, fruit surface become brown, first with particular shaped decay, serious when the whole fruit rot, long white mycelium, after the formation of irregular black sclerotium, fruit drop.And fruit disease, with a dark green spots with particular shape, expanding quickly, after surface long white mildew when humidity is big, dark brown frozen fruit is formed after dry, disease of fruit.

Sweet pepper sclerotium disease and epidemics have what distinction, how to control?

Prevention and control measures

1, agricultural

(1) selecting disease-resistant varieties.

(2) for seed disinfection.The seed before planting the bask in 2 ~ 3 days.Put the seeds in 55 ℃ or so of presoak seed soaking in warm water for 30 min or water after 10 ~ 12 h, with 1% copper sulfate soaked with 5 min, after remove to mix a small amount of plant ash.

(3) disease-free seedling cultivation, improve the plant disease resistance.Soil with disease-free seedling, choose preceding never kind of solanaceae crop land seedling, soil before sowing seed disinfection, with 25% carbendazim wettable powder rake in the grave, or choose 40% formalin 20 ~ 30 ml/square meters water 2.5 ~ 3 l, evenly sprayed on the soil surface, piled up, after fully mix with mulch, unravel coverings, 2 ~ 3 days later, the palm of your soil drying 15 ~ 20 days after being medicine gas distribution, and for planting or engraftment.

(4) strengthen field management, timely cleaning field.Restrain the growth of seedlings into the branches and leaves and fruit vigorous growth period, after reasonable fertilizer, organic fertilizer applied fully decomposed.Rainy season water quantity control, pay attention to the ventilation pervious to light, to prevent the field or PengShi humidity is too high.And cultivating, ridging in time in order to promote root growth.

(5) found that strain to prompt remoal or cut off disease, strain will to work in the concentration of burned or buried.Strain and lime soil around to prevent the spread of the disease.

2, chemical control

Sclerotinia disease before and after spraying 50% carbendazim wettable powder 800 ~ 1000 times liquid, or 50% of the speed, 1500 ~ 2000 times liquid, about once every 10 days 1, 2 ~ 3 times.

Of disease prevention and control, and by 25% before engraftment poisonous mildew or 75% armor frost spirit 800 times liquid filling root, 5 ~ 7 days to fill again.Before engraftment after the onset of spraying 80% generation's fierce zinc 600 times liquid to protect it, 15 days.Early onset of available 75% chlorothalonil 600 times liquid, and 40 kg per 667 square meters spray, spray once every 7 to 10 days, 2 ~ 3 times in a row.

 
 
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