The main symptom is the ear. Before the heading of the affected rice, the disease grows into a grainy fruit body in the glumes, and the flower core is embedded. The fruit body inside the shell extends from the joint of the internal and external culms to the outside of the shell. The shapes are different, the shell is gradually dark, and hyphae are also present. The spikelets are wound so that the spikelets do not spread out and the disease that is extracted is erected in a cylindrical shape, so it is called "a stick of incense." The ear was light blue at first, then white afterwards, and the upper black granular material was the sub-base of the Ma pathogen. The pathogen Ephelis oryzae H.Syd. said that the arbuscular mycorrhizal fungi belong to the fungus Subgeronia spp. Conidiophore scattered, black, light cup or prominent, rounded, 1-1.5 mm in size, surface conidiogenous; conidiophore branches, colorless, size 57-851-1.43 (μm) ; Conidia terminal, single or grouped, colorless needle-shaped, without septum, straight or slightly curved, size 12-221-1.5 (μm). Mycelial growth was moderate at 28°C, below 8°C, and above 34°C, the spores could germinate between 18-30°C, and 26°C was the best. Spores are strong in stress resistance. Prevention and control methods (1) Strengthen quarantine, prevent infected seeds from entering disease-free areas, and introduce them from disease-free areas. 92) No sick fields are kept. (3) Seed treatment. Use salt water or seed selection to remove sporozoites, or use 52-54°C soaking seeds for 10 minutes to kill the germs on the seeds. Pesticides-Plant Growth Regulator Pesticides-Plant Growth Regulator,Hydrogen Cyanamide 50% Solution,Hydrogen Cyanamide 50% Solution 420-04-2,High Effect Hydrogen Cyanamide 50% Solution Ningxia Darong Chemicals & Metallurgy Co., Ltd. , https://www.darong-cyanamide.com
Transmission routes and pathogenic conditions The pathogens are mixed with seeds into the spores and overwintering. Seed carriage is the main cause of disease. There is no disease in the soil. The disease is a systemic invasive disease. After the seeds of the bacteria are sown, the germs invade from the young shoots, causing the disease to occur that year.