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Balikai, R. A.
- Estimation of per Cent Earhead Damage and Yield Loss Due to Earhead Caterpillar, helicoverpa Armigera under Natural Condition on kharif sorghum
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1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad Karnataka, IN
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad Karnataka, IN
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International Journal of Plant Protection, Vol 6, No 1 (2013), Pagination: 168-170Abstract
Variant cultivars (varieties and hybrids) of sorghum were estimated for per cent earhead damage and yield loss caused by earhead caterpillar, Helicoverpa armigera. Within varieties DSV-6 recorded lowest per cent (26.66) earhead damage and high yield of 29.25 q/ha without taking protection. In plots where protection measures were taken with malathion DSV-6 recorded highest (95.0) per cent earhead avoidable damage but DSV-3 recorded highest per cent avoidable yield loss of 27.01. Among hybrids, CSH-14 and CSH-23 recorded lowest and equal (16.66) per cent earhead damage with yield of 36.22 and 37.66 q/ha, respectively in unprotected plots. Whereas in protected plots (malathion 5D), CSH-16 recorded highest (92.6) per cent of earhead avoidable damage but DSV-3 recorded highest per cent avoidable loss of 27.01. If we look out the results, 93.2 per cent of earhead avoidable damage and 17.46 per cent avoidable yield loss was noticed in protected plots over unprotected irrespective of cultivars.Keywords
helicoverpa Armigera, Cultivars, Sorghum
- Present Status on Bio-Ecology and Management of Tobacco Caterpillar, Spodoptera litura (Fabricius) - An Update
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Authors
Affiliations
1 Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 College of Agriculture (U.A.S.), Hanumanamatti, Haveri (Karnataka), IN
1 Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 College of Agriculture (U.A.S.), Hanumanamatti, Haveri (Karnataka), IN
Source
International Journal of Plant Protection, Vol 10, No 1 (2017), Pagination: 193-202Abstract
The tobacco caterpillar, Spodoptera litura (Fabricius) is one of the economically important and regular polyphagous pests on the field and horticultural crops and distributed in Indo-Australian tropics. The larvae feed on a wide range of plants and have been recorded from over 40 mostly dicotyledonous plant families. It is a major pest of tobacco, cotton, rice, maize, soybean and groundnut. The present article focuses on literature generated on various aspects of tobacco caterpillar viz., pest status and their distribution, biology, damage, losses, seasonal incidence, host range and ecology and different management strategies such as, cultural and mechanical, host plant resistance, role of natural enemies and need based chemical control besides integrated pest management strategies employed against this pest.Keywords
Tobacco Caterpillar, Spodoptera litura, Damage, Biology, Management.References
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- Natikar, P.K. and Balikai, R.A. (2015). Tobacco caterpillar, Spodoptera litura (Fabricius): Toxicity, ovicidal action, oviposition deterrent activity, ovipositional preference and its management. Biochem. Cell. Arch., 15(2): 383-389.
- Natikar, P.K. and Balikai, R.A. (2015a). Evaluation of soybean genotypes for their ovipositional preference to Spodoptera litura (Fabricius). J. Exp. Zool. India, 18 (2): 911-913.
- Natikar, P.K. and Balikai, R.A. (2015b). Screening of different varieties of soybean for their ovipositional preference to Spodoptera litura (Fabricius) under field conditions. J. Exp. Zool. India, 18 (2): 975-977.
- Natikar, P.K. and Balikai, R.A. (2015c). Ovicidal action of newer insecticide molecules against the eggs of tobacco caterpillar, Spodoptera litura (Fabricius). J. Exp. Zool. India, 18 (2): 993-995.
- Natikar, P.K. and Balikai, R.A. (2015d). Oviposition deterrent activity of newer insecticide molecules to Spodoptera litura (Fabricius) on soybean. J. Exp. Zool., India 18 (2): 923-925.
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- Natikar, P.K., Madhurima Vinod, Mallapur, C.P. and Balikai, R.A. (2016a). Effect of newer insecticides on population of natural enemies and yield of soybean. J. Exp. Zool. India, 19 (1) : 495-497.
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- Prediction Models for Helicoverpa armigera (Hubner) Based on Abiotic Factors in Chickpea Ruling Variety JG-11
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Authors
Affiliations
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
1 Department of Agricultural Entomology, University of Agricultural Sciences, Dharwad (Karnataka), IN
2 Department of Plant Pathology, University of Agricultural Sciences, Dharwad (Karnataka), IN
Source
International Journal of Plant Protection, Vol 10, No 2 (2017), Pagination: 344-348Abstract
Experiments were carried out on the weather based relationship of pod borer, Helicoverpa armigera (Hubner) during Rabi 2011-12 and 2012-13 at the Main Agricultural Research Station, Dharwad. The analysis comprised correlations between the pod damage with prevailing weekly meteorological parameters during 1, 2, 3 and 4 weeks lead time (prior) and same week of the observations revealed the following results. Forecasting model for per cent pod damage shown maximum temperature at 4 weeks lead time is consistently negatively and highly significant association with per cent pod damage in early sown crop. In case of normal and late sown crop, minimum temperature at 3 weeks lead time is consistently negatively and highly significant association with per cent pod damage by the prediction model.Keywords
Helicoverpa armigera, Weather Parameters, Pod Damage, Correlation, Regression, Forecasting.References
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- Statistical Forewarning Models for Insect Pests and Natural Enemies of Potato in Karnataka During Rabi Season
Abstract Views :190 |
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Authors
Affiliations
1 Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences,Dharwad (Karnataka), IN
1 Department of Agricultural Entomology, College of Agriculture, University of Agricultural Sciences,Dharwad (Karnataka), IN
Source
International Journal of Plant Protection, Vol 11, No 2 (2018), Pagination: 151-157Abstract
An experiment was conducted during Rabi 2016-17 and 2017-18 at farmers filed of Hagaraki village, Dharwad district, Karnataka state to find out the forewarning models for insect pests and natural enemies of potato. Results revealed that, all the weather factors under consideration had a significant role on population fluctuations of insect pests viz., thrips, leafhoppers, whiteflies and mites while coccinellids and chrysopids with respect to natural enemies. Forecasting model for thrips depicted evening relative humidity at lead time zero (same week of observation) had negative and significant correlation with the incidence of thrips population. Based on prediction model [Y = - 3.23 - 0.208X2 (evening relative humidity)] we can forecast thrips population at zero week (during the week of its occurance) upto 41.80 per cent accuracy. Prediction model [Y = -2.58 - 0.090X2 (evening relative humidity)] for whiteflies at lead time zero showed negative and significant correlation with evening relative humidity with accuracy of 32.10 per cent for whitefly population.Keywords
Potato, Insect Pests, Forewarning Model.References
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