How to control Sclerotinia sclerotiorum

Asarum is a valuable authentic traditional Chinese medicine in Liaoning, with wide distribution, high output, good quality and best-selling at home and abroad. Xinbin County began to develop artificially cultivated Asarum in 1986, and now it has a retained area of more than 20,000 hectares with high economic benefits. it is one of the collection and collation of the main varieties of Chinese herbal medicine. Asarum is used as a medicine with whole herb, with pungent taste and warm nature. It has the function of dispelling wind and dispelling cold, enlightening and relieving pain. It mainly treats wind-cold headache, nasal abyss, toothache, phlegm cough, rheumatism arthralgia; recently, it has been used in the treatment of rhinitis, laryngitis, gastritis and oral erosion.

Growth habits of Asarum

Asarum is a happy negative plant, many branches collect and sort out fertile broad-leaved forest, coniferous and broad-leaved mixed forest, or born in dense bushes, slightly humid places at the bottom of the gully and forest edge, so it has the characteristics of like humidity, fertilizer, shade and fear of strong light, but if the canopy is too large under the forest, it will grow very slowly. Practice has proved that Asarum can grow quickly and high yield only through "Hua Dayin" or sufficient scattered light and strengthening the management of water and fertilizer.

How to prevent and cure Sclerotinia sclerotiorum?

What is sclerotinia disease?

Sclerotinia sclerotiorum is a plant disease caused by fungi such as Sclerotinia, Monilinia, Rhizoctonia and Sclerotium. The site of the disease is composed of mycelia with different loose and tight structure, smooth or rough surface, different shape, size and color. Pseudosclerotia formed by hyphae mixed with host tissue. The latter is easier to diagnose because it tends to keep the shape of plant organs (such as nuts, etc.). The pathogen is Sclerotiniasclerotiorum (Lib.) de.Bary. The sclerotia is black on the surface, white inside, and dung-like. The hyphae are not resistant to drying and can only grow when the relative humidity is above 85%. The temperature is not strict, it can grow between 0 ℃ and 30 ℃, and 20 ℃ is the most suitable. It is a kind of disease suitable for low temperature and high humidity.

Symptoms of Sclerotinia sclerotiorum:

Most of the disease occurred from June to July. At the beginning of the disease, there were brown striped disease spots at the base of the petiole, and after expansion, the aboveground parts fell down and died. At the same time, the germs spread to the roots and covered the rhizomes with black sclerotiors. so that the whole root decayed and left only the root bark.

Prevention and control of Sclerotinia sclerotiorum:

Loosen the soil in time in early spring, raise the soil temperature, pay attention to drainage, pull out and destroy the diseased plants in time, spray with 0.3 degree stone sulfur mixture, 600-800 times solution of Dysen ammonium, 600 times solution of Dysen zinc, harvest in time and change land for cultivation.