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Makwana, A. B.
- Field Efficacy of Biopesticides against Helicoverpa armigera in Pearl Millet
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Authors
Affiliations
1 Department of Entomology, College of Agriculture, Junagadh Agriculture University, Junagadh (Gujarat), IN
2 Millet Research Station (J.A.U.), Jamnagar (Gujarat), IN
3 Department of Soil Science and Chemistry, Junagadh Agriculture University, Junagadh (Gujarat), IN
1 Department of Entomology, College of Agriculture, Junagadh Agriculture University, Junagadh (Gujarat), IN
2 Millet Research Station (J.A.U.), Jamnagar (Gujarat), IN
3 Department of Soil Science and Chemistry, Junagadh Agriculture University, Junagadh (Gujarat), IN
Source
International Journal of Plant Protection, Vol 10, No 1 (2017), Pagination: 181-185Abstract
Investigations on evaluation of different bio pesticides against pearl millet ear head worm, Helicoverpa armigera in pearl millet crop were made at Instructional Farm, College of Agriculture, Junagadh Agricultural University, Junagadh during Kharif 2015. Insecticides used in experiment were spinosad @ 0.014 per cent, indoxacarb @ 0.0079 per cent, Beauveria bassiana @2.5 kg/ha, Lecanicillium lecanii@ 2.0 kg/ha, HaNPV @ 500 LE/ha, azadirechtin @ 0.000375 per cent and Bacillus thuringiensis @1.5 kg/ha. Among the eight treatments, spinosad @ 0.014 per cent and indoxacarb @ 0.0079 per cent was found to be most effective in reducing the larval population of H. armigera. The treatments HaNPV @ 500 LE/ha, B. thuringiensis @1.5 kg/ha and azadirechtin @ 0.000375 per cent found moderately effective for the control of this pest. L. lecanii @ 2.0 kg/ha and B. bassiana @2.5 kg/ha proved to be least effective against pearl millet earhead worm. Spinosad @ 0.014 per cent recorded the highest grain yield of pearl millet (2685 kg/ha) and it was at par with indoxacarb @ 0.0079 per cent (2477 kg/ha). As far as economics of various insecticides are concerned, the treatments of HaNPV @ 500 LE/ha or spinosad @ 0.014 per cent or azadirechtin @ 0.000375 per cent were found as effective and economical as recommended synthetic insecticides and are recommended for eco-friendly management of H. armigera in pearl millet ecosystem.Keywords
Spinosad, Indoxacarb Helicoverpa armigera, Pearl Millet, Beauveria bassiana.
References
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- Population Dynamics of Helicoverpa armigera in Pearl Millet
Abstract Views :201 |
PDF Views:0
Authors
Affiliations
1 Department of Entomology, College of Agriculture, Junagadh Agriculture University, Junagadh (Gujarat), IN
2 Millet Research Station (J.A.U.), Jamnagar (Gujarat), IN
1 Department of Entomology, College of Agriculture, Junagadh Agriculture University, Junagadh (Gujarat), IN
2 Millet Research Station (J.A.U.), Jamnagar (Gujarat), IN
Source
International Journal of Plant Protection, Vol 10, No 2 (2017), Pagination: 339-343Abstract
Population dynamics of Helicoverpa armigera in pearl millet was studied during Kharif 2015 at Instructional Farm, Junagadh Agricultural University, Junagadh. The study revealed that the pest incidence commenced from seventh week after sowing in variety GHB-558 and was found active from August to September in the crop. The pest population increased in the last week of August and reaching to a peak level of 1.56 larvae per ear head. Then it was decreased (0.82 larvae/ear head) during the first week of September and remained active steady upto second week of September. Among the different parameters, maximum temperature and mean bright sunshine hours showed positive correlation whereas minimum temperature, morning relative humidity showed negative correlation with population of this pest but did not reached at significant level. However, the correlation between the pest population and evening relative humidity was significant and negative. Rainfall exhibited a non-significant and negative correlation with the pest population.Keywords
Population Dynamics, Pearl Millet, Helicoverpa armigera.References
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