Changes in ascorbic acid content of rice cultivars due to Rhizoctonia solani inoculation and carbendazim application
1989
Karthikeyan, A. | Thirumurthi, S. | Narayanaswamy, R. (Agricultural Research Station, Bhavanisagar (India))
During 1985 samba season (Aug-Jan), rice varieties ADT31, CR1009, AU42/1, IR20, and White Ponni were inoculated with Rhizoctonia solani at maximum tillering (80 d old) by single sclerotium method. Fungicide (0.1% carbendazim) was sprayed 3 d after inoculation. Sheath portion of the plants sampled at 3, 5, and 7 d after inoculation and 3, 5 and 7 d after fungicide application were analyzed for changes in ascorbic acid content. Highly susceptible ADT31 contained less ascorbic acid than susceptible CR1009, AU42/1, IR20, and White Ponni. Ascorbic acid content increased with R. solani inoculation in all varieties and with fungicide application. It decreased with plant age.
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