What kind of drugs are used for sclerotiorum disease

Sclerotinia sclerotiorum generally uses 50% carbendazim wettable powder 4kg per mu, fully mix an appropriate amount of dry soil on the border surface, and then rake into the soil, the source of primary infection can be reduced. In the early flowering stage, 70% mancozeb wettable powder can be sprayed on the base of plant stem, old leaves and ground with 1000 times solution of 70% methyl thiophanate, 50% carbendazim or 40% carbendazim wettable powder. In the early stage of the disease, once every 7 to 10 days, continuous spraying for 2 times can effectively prevent and cure the disease.

What symptoms does Sclerotinia disease have?

In the seedling stage, the injured stems and petioles will appear reddish-brown spots, later will expand and become white. If the disease occurs in the leaf stage, the old leaf margin at the base of the plant will begin to develop the disease first.

The plaque initially shows a dark cyan water stain, and later expands into large round or irregular spots, with a yellowish brown in the center and a light yellow around it. Sometimes the outline of the disease spot will be more obvious, in dry weather, the disease spot will be ruptured and perforated, in rainy weather, the disease spot will expand rapidly, and the whole leaf will become rotten.

If the disease occurs in the stem, the general pathogen will appear in the middle and lower part of the main stem, and the spot will show a light brown waterlogging at the initial stage, and will gradually develop into an oval in the later stage. Under moist conditions, the disease spot will expand rapidly, reaching the later stage of the development of the disease, the cortical column and the rhizome become extremely easy to break.

Second, what is the incidence law of Sclerotinia sclerotiorum?

The pathogen of Sclerotinia sclerotiorum is Sclerotinia sclerotiorum, Sclerotinia sclerotiorum is round or irregular shape, the initial stage is white, the later stage becomes black, and the interior of the bacteria is gray-white. The parasitic range of bacteria is very wide, in addition to rape, there are sunflowers, carrots and other crops.

Third, how to control Sclerotinia sclerotiorum?

1. Agricultural prevention and control:

(1) cultivate disease-resistant varieties: cultivate improved varieties with high yield and disease resistance according to local conditions.

(2) seed disinfection: through screening, drug soaking and other methods to eliminate sclerotia and kill the bacteria in the seed epidermis, and sow disease-free seeds.

(3) timely removal of disease and debris: after harvesting crops, burn and remove the disease and debris in the field and roadside in time, so as to reduce the source of germs.

2. Chemical control:

The use of prochloraz, make 100 grams and other specific drugs for protective treatment, the best period of use of prochloraz is from full flowering to the end of flowering.

The above is a detailed introduction of what drugs and symptoms of Sclerotinia sclerotiorum disease. I hope it will be helpful to everyone.