Peanut sclerotinia
Chinese name: Peanut small sclerotinia Latin name: SclerotiniaarachidisHnzawa Harmful crop: peanut Symptoms: Peanut sclerotinia is mainly caused by roots and roots and necks, and can also damage stems, leaves and fruits. At the onset of the disease, the lesions were dark brown, gradually enlarged, turned brown, and finally dark brown. The affected part is softened and rotted, the vascular bundle is destroyed, and the whole plant is wilted and dead. In the case of moisture, the surface of the diseased part is brown and hairy, and produces a grayish white powder. The black sclerotium is produced between the cortex and the xylem of the rhizome of the column. Sometimes the sclerotium can break through the epidermis. Morphological characteristics of pathogens: diseases caused by fungi (SclerotiniaarachidisHnzawa). The conidiophores are brown, slender and segregated, the upper part is conidial, and the branches are conident. The conidia are colorless, unitary, and oval. Sclerotium black, 2.5 mm long, wide o. 5 mm, buried in the soil, initially conidia, which then form a sac disk. The ascending disk is initially cylindrical, and is funnel-shaped and has no holes. The sac is in the shape of a stick, the ascospores are oblate, elliptical, colorless, unit cell, hyphae, colorless, with a septum. Characteristics of the disease: The bacteria are attached to the plant, the pod shell or directly over the soil in the sclerotia. The conidia are first produced in the next year, and then the ascospore is produced. Both conidia and ascospores can be infested for the first time, and sometimes hyphae can also be directly infested. Most of the pathogens invade from the wounds, and the high-temperature and high-humidity conditions can accelerate the spread of the disease, and the long-term peanuts are seriously affected. Control methods: (1) The rotation of seriously ill fields should be carried out with wheat, millet, corn and sweet potato. (2) Reducing the pathogens in the field. The diseased plants should be removed in time before the end of the sclerotium. After harvesting, it is necessary to pay attention to clear the plant residues and concentrate on the treatment. During the growing season of peanuts, deep cultivating will be carried out, and the sclerotia will be buried in the soil to prevent the formation of ascospore plates and reduce the chance of disease transmission. Real Time PCR Detection System Disease Detection System,Real Time Pcr Equipment,Pcr Amplification System,Nucleic Acid Detection System HANGZHOU DIAN BIOTECHNOLOGY CO., LTD. , https://www.dianbiotech.com