International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 6
First page : (1465) Last page : (1470)
Article doi: http://dx.doi.org/10.18782/2320-7051.5261
Studies on Population Dynamics of Major Insect Pests Infesting Chilli (Capsicum annum L.)
Rajput V. S.1, Prajapati B. G.2, Pareek A.3* and Patel P. S.4
Department of Agril. Entomology, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar, 385 506 Dist: Banaskantha, Gujarat, India
*Corresponding Author E-mail: pareek.ento@gmail.com
Received: 20.07.2017 | Revised: 29.08.2017 | Accepted: 4.09.2017
ABSTRACT
A Field experiment was conducted to study the population dynamics of major insect pests infesting chilli (Capsicum annum L.). Results revealed that whitefly (Bemisia tabaci Genn.), leafhopper (Amrasca biguttula biguttula Ishida), and aphid (Aphis gossypii Glover) commenced the activity during the last week of July. The aphid reached its peak during the first week of September (8.36 aphid/ 3 leaves,) while the peak activity of whitefly and leafhopper was recorded during the second week of September (7.12 whitefly/ 3 leaves and 6.44 leafhopper/ 3 leaves), respectively. The incidence of thrips (Scirtothrips dorsali Hood) was commenced during the second week of August and reached the peak during the third week of September (9.50 thrips/ 3 leaves). Yellow mite (Polyphagotarsonemus latus Banks) appeared on the crop during the third week of August and reached its peak level during the third week of September (6.54 mite/ 3 leaves). Further, the incidence of fruit borer, Halicoverpa armigera Hubner was commenced during the third week of September and recorded at peak in the third week of October (2.88 larvae/ plant).The correlation study showed that thrips exhibited highly significant negative correlation with evening relative humidity and significant positive correlation with maximum temperature. The leafhopper population showed positive and significant correlation with minimum temperature. None of weather parameters showed significant impact on whitefly and aphid population. The correlation between yellow mite and maximum temperature was significant and positive, while, evening relative humidity had significant negative correlation. The fruit borer showed highly significant and negative correlation with morning and evening relative humidity while, maximum temperature and sunshine hours were significant with positive correlation.
Key words: Chilli, Incidence, Population, Peak, Seasonal, Correlation, Significant
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Rajput, V.S., Prajapati, B.G., Pareek, A. and Patel, P.S., Studies on Population Dynamics of Major Insect Pests Infesting Chilli (Capsicum annum L.), Int. J. Pure App. Biosci.5(6): 1465-1470 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5261
