Survey on Stem Rot of Rice Incited by Sclerotium oryzae in Khammam and Warangal Districts of Andhra Pradesh
Indian Journal of Plant Protection(2011)
Abstract
Severity of stem rot disease varied from field to field in Khammam and Warangal districts ranging from 0 to 15 per cent. Highest disease incidence was recorded in late transplanted as compared to early transplanted crop. Maximum stem rot incidence (14.8%) was recorded in rice-rice cropping sequence followed by rice-groundnut (3.8%), rice-maize (2.8%) and sunhemp-rice-maize-vegetables (2.1%). Similarly, disease incidence was in clay loam soils (14.0%), followed by clay soils (8.7%), loamy soils (7.8%), while lowest incidence of stem rot was noted in fields with sandy soils (2.7%) and sandy loam soils (2.6%). The fields applied with 151–180 kg N/ha showed highest disease incidence (11.1%) followed by 120–150 kg N/ha (8.1%) and 100–120 kg N/ha (2.5%).
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Key words
Sheath blight resistance
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