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Khating, S. S.
- Seasonal Incidence of Sucking Pests of Okra along with Natural Enemies in Khandesh Region of Maharashtra
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Authors
Affiliations
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN
Source
Asian Journal of Bio Science, Vol 11, No 2 (2016), Pagination: 269-272Abstract
Studies on seasonal incidence of sucking pests of okra along with natural enemies were undertaken at research farm of Department of Agricultural Entomology, College of Agriculture, Dhule during Kharif 2015. A study on seasonal incidence of sucking pests was undertaken on Kharif crop, revealed that leafhoppers incidence reached its peak activity during the second week of September (23 leafhoppers/3 leaves/plant) whereas the peak incidence of aphids was noticed in the first week of September (43.3 aphids/3 leaves/plant). The peak incidence of the whiteflies was recorded during the second week of September (21 whiteflies/3 leaves/plant), whereas peak activity of predator lady bird beetle was reported during second week of September (26 lady bird beetle/plant), when the population of sucking pests was at its peak. The incidence of aphids (r = 0.170), whiteflies (r = 0.287) and leafhoppers (r = -0.060) do not show any significant correlation with maximum temperature. The minimum temperature showed positive non-significant correlation with leafhoppers (r = 0.131) and positive significant correlation with aphids (r = 0.644*). The morning relative humidity showed positive non significant correlation with occurrence of the leafhoppers (r = 0.454), aphids (r = 0.458), whitefly (r = 0.313). Similarly, the evening humidity showed negative non-significant correlation with the pests such as leafhoppers (r = -0.100), aphids (r = -0.223) and whiteflies (r = -0.339) during Kharif 2015 season. The rainfall had non-significant effect at 5 per cent and 1 per cent level with whitefly, aphid and leafhopper.Keywords
Okra, Seasonal Incidence, Kharif.
References
- Anitha K. R. (2007). Seasonal incidence and management of sucking pest of okra. M. Sc. (Ag.) Thesis, Dharwad Agriculture University, Dharwad, KARNATAKA (INDIA).
- Anita, K.R. and Nandihalli, B.S. (2008). Seasonal incidence of sucking insect pests in okra ecosystem. Karnataka J. Agric. Sci., 21:137-138.
- Anonymous (2015). Indian Horticulture database, Govt. of India.
- Krishnaiah, K. (1980). Methodology for assessing crop losses due to pests of vegetable. Assessment of crop losses due to pests and diseases. Proc. of Workshop held from Sept., 19-30, 1977 at U.A.S., Bangalore, pp. 259- 267.
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- Seasonal Incidence of Thrips (Thrips tabaci, Lind.) on Onion in Khandesh Region of Maharashtra
Abstract Views :213 |
PDF Views:0
Authors
Affiliations
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN
1 Department of Agricultural Entomology, College of Agriculture, Dhule (M.S.), IN
Source
International Journal of Plant Protection, Vol 10, No 1 (2017), Pagination: 203-205Abstract
Seasonal incidence of thrips on onion was evaluated in field trials at the instructional farm of Agricultural Entomology Section, College of Agriculture, Dhule during Kharif season of 2015-16. The data on average number of thrips per plant under field conditions along with weather parameters viz., temperature (maximum and minimum), relative humidity (morning and evening) and rainfall are correlated. The infestation of thrips was first observed at 2nd week after transplanting in 38th SMW, with population of 1.6 thrips/plant. The population of thrips above 5 thrips/plant was noticed from 4th week of September i.e. 40th SMW onwards. The peak incidence of 19.1 thrips/plant was recorded in 46th SMW i.e. second week of November. The correlation of thrips with morning humidity (-0.7324)**, evening humidity (-0.7123)** and rainfall(-0.5820)* are negatively significant effect at 5 per cent and 1 per cent level with thrips.Keywords
Onion, Thrips, Seasonal Incidence.References
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- Neergude, Mallinath, Biradar, A.P., Veerendra, A.C. and Sathisha (2014). Seasonal abundance of onion thrips, T. tabaci Lind. and their natural enemies under dry land conditions. IJAPBC, 3 (1) : 33-36.
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- Shitole, D.M., Shankar, G. and Mithyantha, M.S. (2002). Evaluation of certain new insecticides against onion thrips (Thrips tabaci Lind.). Pestology, 26(2): 49-51.