DEVELOPMENT AND EVALUATION OF FORMULATIONS OF Nomuraea rileyi (Farlow) Samson AGAINST Spodoptera litura (Fabricius) ON CABBAGE

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Date
2018-12
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University of Horticultural Sciences, Bagalkot
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The present investigation on development and evaluation of formulations of Nomuraea rileyi (Farlow) Samson against Spodoptera litura (Fabricius) was carried out at Bio control laboratory, Department of Entomology, Kittur Rani Chanamma College of Horticulture (KRCCH), Arabhavi during 2017-18. A total of 26 different formulations (edible oil, talc powder and combination of edible oil + talc powder) of N. rileyi were developed and screened against laboratory reared third instar larvae of S. litura. Among all the formulations tested against S. litura, the formulations of groundnut oil recorded highest mean mortality of 83.33 per cent followed by combination of groundnut oil + rice grain (80.00%), combination of groundnut oil + wheat grain (73.33%), mustard oil + rice grain (73.33%), combination of mustard oil + ragi grain (70.00%) and mustard oil + wheat grain (70.00%). The most of the formulations of N. rileyi developed were recorded more than 50.00 per cent mean mortality of S. litura under laboratory conditions. Four best formulations (groundnut oil formulation, combination of groundnut oil + rice grain, mustard oil + rice grain and mustard oil + wheat grain) of N. rileyi were tested for their virulence under different storage period (3 months) and temperature. The storage of selected formulations in refrigerator (4˚C) and mud pot filled with wet sand recorded the highest mortality of S. litura compared to storage under room temperature (27.0 ± 1.0˚C) and incubator conditions (35˚C) after three months of storage period and storage conditions. Further, selected formulations of N. rileyi were evaluated against S. litura on cabbage under semi-field condition. Among the different formulations of N. rileyi, the maximum mean per cent mortality was recorded in the groundnut oil (31.73 %) followed by combination of groundnut oil + rice grain (29.07%), mustard oil + rice grain (27.20%) and mustard oil + wheat grain (27.47%) formulations. However, it is inferior to the NSKE (39.20%) and indoxacarb 14.5% SC (69.07%).
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