Perpetuation of Rice Sheath Blight Pathogen (Thanatephorus cucumeris) Under Temperate Conditions of Kashmir, India

Mughal, Mohammad Najeeb; Ahmed, Mushtaq; Bashir, Sabiya; Anwar, Ali; Bhat, K. A.; Lone, Zahoor Ahmad; Bashir, Imran; Bhat, Nazir Ahmad; Dar, Z. A.; Bhat, M. A.; Nissa, Seerat un; Wani, Rayees Ahmad; Hakeem, S.A.

doi:10.20546/ijcmas.2017.611.434

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“…"Rice sheath blight caused by Rhizoctonia solani Kuhn (Teleomorph: Thanatephorus cucumeris (Frank) Donk) is a major fungal disease of rice causing yield losses to the extent of 20 to 70 per cent" [7]. Rhizoctonia solani is a soil borne, necrotrophic, basidiomycetous fungus mainly perpetuating on rice seeds, plant debris and in soil in the form of sclerotia and mycelia which serve as the primary inoculum [8]. "The sclerotia can survive in the soil for more than 2 years and spread in the field during ploughing and flood irrigation thereby causing infection near the water level which spreads rapidly to the upper parts by runner hyphae.…”

Section: Introductionmentioning

confidence: 99%

Prevalence of Rice Sheath Blight Disease in Cauvery Command Area of Karnataka, India

Reddy Kumar A. V.,

Kumar,

Kumar

et al. 2024

AIR

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Among the various disease of rice, sheath blight caused by Rhizoctonia solani Kuhn has become one of the major fungal diseases covering different rice growing ecosystem of Cauvery command area of Karnataka. Roving disease survey was conducted during Kharif-2022 to know the occurrence and spread of sheath blight disease in Cauvery command area of Karnataka i.e. Mandya, Hassan, Mysuru and Chamarajnagara. Among the four districts surveyed, disease severity (%) was found highest in Hassan district with a mean disease severity of 22.86% which is followed by Mandya (19.90%), Mysuru (19.39%) and least disease severity was recorded in Chamarajnagara (12.54%). The high severity of sheath blight might be due to the highly favourable factors like high relative humidity, less temperature and water stagnation in these locations during the period of survey. Large scale cultivation of susceptible varieties as mono crop continuously on the same field might have increased the possibility of perpetuating the pathogen in the crop debris. This study can serve as basic to evaluate location specific integrated disease management strategy against sheath blight disease of rice.

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Section: Introductionmentioning

confidence: 99%