Setaria viridis (L.) Beauv. Alias â€‹â€‹èŽ , bright grass, bright seeds (seeds), golden hairs of foxtail, glutinous rice, hairy grass, dog hair tail and so on. It is a grass annual herb. Use herbs or flower spikes, roots and seeds as medicine. With hurricane eyesight, heat diuretic effect. Distributed throughout the country.
The symptoms are also called scabs. It can develop throughout the growing season, mainly affecting leaves, leaf sheaths, and caryopsis. The leaves were infected with many yellow to yellow-brown spots. The spots were elliptical or spindle-shaped. The edges were not obvious and the color was dark. They turned brown to dark brown and the size ranged from 3 to 52 to 3 (mm). The lesions are blunt at both ends. A black layer of mildew-like fungus was formed on the surface of the later lesions, ie pathogenic conidiophores and conidia. In severe conditions, the lesions fuse and the leaves die.
Pathogen Bipolaris setariae (Saw.) Shoem. Synonyms Helminthosporium setariae Saw. Called the genus Helminthosporium spp. The Cochliobolus setariae (Ito et Kurib) of the sex state Drechsler et Das-tur is called Coriolus versicolor, belonging to the genus Ascomycota. The daughter capsule is flask-shaped, with a size of 240-500220-315 (μm) and a 60-125 μm length. Ascospore spindles, size 130-15022-32 (μm), contain 1-8 ascospores. Ascospores linear, with 5-9 membranes 3, size 200 to 3156-7 (μm). Conidia stems more than solitary, a few 2-3 clusters, erect or slightly curved, geniculate, 5-10 diaphragm, brown green, size 105-1567.5-10 (μm). Conidiophores dark olive, fusiform to club-shaped, slightly curved, with 5-8 septa, size 40-12010-18 (μm), bud tube at both ends.
Transmission pathways, disease conditions, and control methods can be found in rice leaf spot disease.
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