FIELD EFFICACY OF CHEMICALS FOR THE MANAGEMENT OF TWISTER DISEASE OF ONION
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2017, Vol 7, Issue 1
Abstract
Twister disease of onion has become epidemic in coastal tract and other onion growing districts of Karnataka which caused heavy loss, Therefore efforts were made to manage the disease by chemicals.Field trial was conducted on onion variety Arka kalyna to test the efficacy of fungicides and insecticides against twister disease of onion under field condition during kharif 2011 and 2012 at MARS Dharwad. The fungicides namely mancozeb @ 0.25%,propiconazole @ 0.1%, copper oxychloride @ 0.25%, tricyclazole @ 0.1% and hexaconazole @ 0.1% were tested alone and along with insecticides namely methomyl @ 0.8g/L, carbosulfan @ 2ml/L and profenofos @ 1ml/L in the present study. Results indicated that T2 (Mancozeb 0.25%, Tricyclazole 0.1% and Hexaconazole 0.1%) recorded least PDI (29.58) followed by T1 (Mancozeb 0.25% Propiconazole 0.1% Copper oxychloride 0.1%) (43.54 PDI) and maximum PDI 61.63 was observed in T3 control. The yield was significantly superior in T2 37.99 t/ha with B:C value of 1.83 followed by T1 with 33.25 t/ha and minimum yield 26.34 t/ha was recorded in control (T3).The study revealed that combined sprays of fungicides and insecticides effectively managed the disease as well as increased yield of onion
Authors and Affiliations
SURESH PATIL, V. B. NARGUND
Keywords
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