BIO-EFFICACY OF MYCO-JAAL™ 10% SC, AN OIL BASED COMMERCIAL FORMULATION OF Beallveria hassialla (Bals.) Vuillemin AGAINST DIAMONDBACK MOTH Pllltella xylostella (L.) (LEPIDOPTERA: YPONOMEUTIDAE) ON CABBAGE

S.K. GHOSH, MALVIKA CHAUDHARY, M.S. PRABHAKAR

Abstract


MYCO-JAA™ 10% SC is a country's firsI registered oil based commercial
fomulation of Baevaria bassiana In bioassay study. LC30 value of Myco-jaal was recorded to be 0.6mVlitre (6x 10' conidia Iml) of water by leaf dip method under laboratory conditions against early 3rd instar larvae of diamondhack moth (DBM) at 25+ 11) C and 70-80% R.H. Under famlers field condition, application of Myco-jaal (@2ml/litre) was found to reduce DBM population by 55.10% over control, upto?5 days after treatment which was on par with Indixicarb-14.5% SC alone (60.00%), Myco-Jaal in combination with Indoxicarb-14.5% SC (62.63%) and farmer's practices (61.62%), using a combination of different chemicals to prevent the development of resistance in OHM population. However, the highest yield was recorded in the treatment involving combined application of Myco-Jaal and Indoxicarb-14.5% SC with an increase of 6.8t/ha over control. This
was followed by Indoxicarb-14.5% SC (54.88t/ha), farmer's practice (54.40t/ha). MycoJaal (52.57t/ha) and control (48.96t/ha). The yield increase over control in Myco-Jaal treatment was 3.6L/ha. However, the highest cost: benefit ratio was obtained with MycoJaal 5.41. followed by Myco-jaal in combination with Indoxicarb-14.5'Vo S(' (4.23), Indoxicarb-14.5% SC (3.84) and farmers' practice (2.60). Although, Indoxicarb-14.5%SC was found to be the most effective insecticide against DBM in the present studies, MycoJaal was found to be superior based on cost: benefit analysis, indicaling the potential of this bio-pesticide as an eco-friendly alternative in managing DBM.


Keywords


Beaveria bassiana; Diamondback moth; Plutella xylostella

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