Studies on Incidence, Severity and Management of Sesamum Phyllody in Central DryZone of Karnataka

摘要

Studies for incidence and severity of sesamum phyllody in major sesamum growing areas of Tiptur and Arsikere taluk in central dry zone of Karnataka was carried out during 2009-10,2010-11 and 2011 -12, and effect of chemicals on incidence and severityof sesamum phyllody was tested at Agricultural Research Station, Konehally, Tiptur, during 2010-11 and 2011-12. The survey results revealed that maximum per cent incidence of phyllody was recorded in Tiptur taluk (52.89 %) followed by Arsikere taluk, (46.97 %) with 60.18 and 57.49 per cent conversion of pods into leaf like structures in Tiptur and Arsikere taluks respectively. Among different treatments tested during 2010-11, Imidachloprid 70 WS seed treatment @7.5g/kg seed+Monocrotophos 36 SL (0.2 %) spray at the time of initiation of symptoms accounted minimum incidence (18.00 %) followed by Imidachloprid 70 WS seed treatment @ 7.5g / kg seed and Triazophos 40 EC (0.2%) spray, which accounted for 18.34 and 19.00 per cent disease incidence, respectively. The maximum (65.00) per cent conversion of pods into leaf like structures was accounted by untreated control. The plant to plant per cent conversion of pods in to leaf like structures was ranged from 21.20 to 100.00 per cent. Similarly during 2011-12, Imidachloprid 70 WS seed treatment @ 7.5g/kg+ Monocrotophos 36 SL (0.2 %) spray accounted minimum (23.00 %) incidence followed by Imidachloprid 70 WS seed treatment @ 5g / kg seed +Triazophos 40 EC (0.2 %) spray which accounted 23.34 per cent. Untreated control accounted maximum (31.34 %) incidence. The average per cent conversion of pods into leaf like structures was ranged from 44.82 to 55.53 per cent, whereas, plant to plant conversion ranged from 19.38 to 100 per cent. However there was no significant difference observed among the treatments in both the years tested.