Symptoms of seedling and adult plants can be affected. The embryonic axis of young shoots was yellowish-brown and eroded, and some of them were softened or collapsed and died of disease. The cotyledons were infected with primary purple-red dots and later became nearly round to irregular rectangular yellow-brown or gray-white lesions surrounded by purple. Symptoms of true leaf infection are similar to those of the cotyledons, but they can spread along the veins to partially twist the leaves. Stem splinters produce tan-orange-shaped, slightly concave lesions surrounded by red-brown or purple-red. The apical lesions stained with black erosion, the surrounding tissue was slightly swollen or a cross-branch-like “swollen head” caused the plants to not live long. Buds and flowers are often eroded off and the pods become deformed. When the humidity is high, the diseased part produces orange-red mucilage conidia.

The pathogen Colletotrichum hibisci Pollacci is known as Anthelium spp. Synonym: C. hibisci-cannabiniSacc. Bristles are rare on conidia. Conidiophores are long cylindrical, unit cells are colorless, size 15-244-5 (Um). Conidia elliptic to oblong, unit cells colorless, size 22-243. 5-6. 0 (Um). Spore germination, pathogen growth temperature limit of 3-35 °C, suitable temperature of 25 °C, the optimum relative humidity of nearly 100%. There are two physiological races, No. 1 and No. 2.

Pathways and pathogenic conditions The pathogens infested in or on the inside and outside of the seeds became the source of infestation early in the year. The molecular spores produced in the diseased area are re-infected by storms or insects. The extent of the disease depends mainly on the disease resistance of the species, the rate of seed colonization, and the climatic conditions. The difference in disease resistance among varieties is obvious, and the spring and autumn rainy season is easy to be affected by warm and rainy weather. The southern part occurred in May-June and September-October. The incidence in the spring in the north is light, and it is easy to develop in the rainy season from July to September. Ma Tian low-lying or high groundwater level, partial application of excessive nitrogen fertilizer incidence.

Control methods (1) Selection of varieties resistant to anthrax. Such as China's Xiang Hongma 2, United States's Everglades 41, 71, Cuba's Cuba 961, 1087 and so on. (2) Seed disinfection. With 50% Tuzet WP or 80% anthraquinone Fu Mei, rice feet green, more than Fu mixture, such as seeding storage after about half a month. (3) Enter the onset season, spraying 50% benomyl WP or 50% TU wettable powder, 80% WP WP, 80% anthrax omeprazole WP in time before the onset or early onset. Liquid, 25% carbon tetrachloride wettable powder 500 times. (4) Foreign use of effective ingredients of 0. 05 Dodine or 0.2% of 50% thiram WP is excellent. (5) Strengthen management of Ma Tian. Drain the water immediately after the rain, prevent moisture from staying, avoid partial application of nitrogen fertilizer, properly apply potassium fertilizer, and pay attention to improving disease resistance.

Freeze Dried Fruit and Vegetable

Dried Wild Blueberries,Sunny Fruit Dried Strawberries,Dried Strawberry Chips,Frozen Dried Strawberries

Shanghai Sinospices Sourcing Ltd , https://www.garlicall.com