Triệu chứng Net blotch has two forms: the spot form and the net-like form. Symptoms are most commonly found on leaves, but can occasionally appear on leaf sheaths and glumes. The net form starts as pinpoint brown lesions which elongate and produce thin, dark brown streaks along and across the
Net Blotch
Nấm
Triệu chứng
Net blotch has two forms: the spot form and the net-like form. Symptoms are most commonly found on leaves, but can occasionally appear on leaf sheaths and glumes. The net form starts as pinpoint brown lesions which elongate and produce thin, dark brown streaks along and across the leaf blades, creating a distinctive net-like pattern. Older lesions continue to elongate along leaf veins and are often surrounded by a yellow margin. In the beginning the spots are small solid brown oval lesions, surrounded by yellow edges. Later on, the spots may grow to light or dark brown blotches of 3-6 mm in diameter. The ear can also be infected. Small brown streaks, without the netted appearance, develop on the glumes, causing reduced yields and shriveled seeds. Infected kernels have indistinct brown lesions at their base.
