YELLOW EAR ROT
Download as PPTX, PDF0 likes1,736 views
This document summarizes two wheat diseases: tundu or yellow ear rot caused by the nematode Anguina tritici and bacterium Corynebacterium tritici, and leaf blight of wheat caused by the fungus Alternaria triticina. Tundu or yellow ear rot causes twisting of stems, distorted ear heads, oozing liquid from tissues containing bacterial cells. It is spread through contaminated seeds and favors low temperatures and high humidity. Management includes using disease-free seeds, destroying infected plants, and applying antibiotics or carbofuran. Leaf blight causes reddish-brown leaf spots and drying of leaves under favorable warm, humid conditions. Management involves deep plowing, seed treatment, destroying infected
More Related Content
Similar to YELLOW EAR ROT (20)
More from Nugurusaichandan (20)
YELLOW EAR ROT
- 1. Tundu or yellow ear rot (nematode) Anguina tritici ; ( bacteria) Corynebacterium tritici Vernacular name: tundu vyadhi Symptoms: twisting of the stem, distortion of ear head and rooting of spikelets -oozing of liquid from affected tissues and the ooze mass contains bacterial cells -infected plants are shorter than normal plants - infected plants produce more tillers than the others Disease cycle: primary infection- starts through contaminated seeds with nematode galls sec inf: wind and rain -nematodes secretes some substances that helps bacteria to cause disease
- 3. ‘ Favorable cond: low temperature and high humidity favours the disease Disease management: sow disease free seeds -collection and destruction of diseased plants seeds can be free from galls by floating in brine at 160g sodium chloride per litre of water -antibiotics such as streptocycline @1g in 10lts of water and [email protected] a.i/ha
- 4. leaf blight of wheat casual organism: Alternaria triticina vernacular name: godhuma aaku mudatha • Symptoms : reddish brown oval spots appear on younger seedlings with bright yellow margin -Severe cases : drying of leaves, young leaves are not infected burnt appearance heavily in the infected fields • Pathogen : lights brown colour, multicellular conidia with 1-10 transverse septa , 1-5 longitudinal septa singing or in chains (2-4) • Disease cycle : summers over in plant debris & soil primary spread : exit and internal seed borne disease secondary infection: wind
- 6. .• Favourable conditions: 25⁰c temp & high R.H • MANAGEMENT : Deep summer ploughing Seed treatment and collection and destruction of diseased leaves Soak the seed in water for 4hrs followed by 10mins hot water at 52⁰c Resistant varieties: sonalika, arnautka Spray mancozeb @0.25 or [email protected]%