International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 1
First page : (849) Last page : (856)
Article doi: http://dx.doi.org/10.18782/2320-7051.2482
Comparative Biology of Helicoverpa armigera (Hubner) Reared on Different Hosts
Rabari G.N.1*, Pareek A.2 and Patel B.R.1
1Department of Agril. Entomology, C. P. College of Agriculture, S. D. Agricultural University,
Sardarkrushinagar, 385 506 Dist: Banaskantha, Gujarat, India
2Department of Agril. Entomology, Tharad Agriculture College, S. D. Agricultural University,
Tharad, 385 565 Dist: Banaskantha, Gujarat
*Corresponding Author E-mail: gpadheriya7800@gmail.com
Received: 12.01.2017 | Revised: 24.01.2017 | Accepted: 25.01.2017
ABSTRACT
The data on comparative biology of H. armigera on different hosts inferred that the eggs length and breadth (0.51 ± 0.02 and 0.53 ± 0.02 mm) and hatching (90.00 per cent) were noted maximum when reared on chickpea and minimum (0.48 ± 0.02 and 0.50 ± 0.02 mm) (80.00 per cent) on cabbage host. The incubation period was minimum on chickpea with 3.73 ± 0.64 days and maximum with 4.27 ± 0.83 days on cabbage. Six larval instars were observed on all three hosts under study. The colour of larvae varied in different instars and was observed light brown initially, later to greenish brown, yellowish-brown, light black brown and pale green with longitudinal stripes. Measurement of larval instars was recorded maximum (1.52 ± 0.04 and 0.49 ± 0.01 mm to 41.21 ± 1.59 and 5.90 ± 0.13 mm length and breadth) when larvae reared on chickpea, while minimum (1.43 ± 0.05 and 0.45 ± 0.02 mm to 37.03 ± 3.00 and 5.00 ± 0.25 mm length and breadth) when larvae reared on cabbage host. The minimum larval developmental period of 22.97 ± 1.10 days was noted on chickpea, whereas, it was maximum (27.10 ± 1.60 days) on cabbage. Similarly, the length and breadth of pre-pupae (25.60 ± 1.23 and 5.92 ± 0.23 mm) and pupae (21.04 ± 1.17 and 6.59 ± 0.29 mm for male and 21.54 ± 1.49 and 7.10 ± 0.21 for female) was maximum when H. armigera reared on chickpea host and minimum of 23.13 ± 1.64 and 5.34 ± 0.44 mm for pre pupa, 19.04 ± 1.20 and 5.57 ± 0.35 mm for male pupa and 19.36 ± 1.91 and 6.04 ± 0.18 mm for female pupa was measured on cabbage. The minimum pre pupal (1.93 ± 0.69 days) and pupal periods (8.07 ± 0.98 and 11.17 ± 1.05 days for male and female) were recorded on chickpea host, while maximum (2.27 ± 0.45 days pre pupal and 9.13 ± 0.94 and 12.70 ± 1.26 days male and female pupal periods) on cabbage host. The length and breadth of adult moths measured as 17.42 ± 0.85 and 34.18 ± 1.57 for male and 20.36 ± 0.83 and 40.78 ± 1.26 mm for female on chickpea host which was maximum as compared to cabbage recorded 14.35 ± 0.67 and 31.36 ± 1.56 mm for male moth and 18.33 ± 0.85 and 34.48 ± 1.51 mm for female, which was minimum. Among three hosts the longevity of male and female was recorded maximum with a mean of 5.70 ± 0.97 and 9.20 ± 1.32 days on chickpea and minimum with a mean of 5.30 ± 0.95 and 8.30 ± 1.42 days, respectively on cabbage. The mean pre-oviposition, oviposition and post-oviposition periods of H. armigera female were observed as 2.40 ± 0.52, 5.90 ± 0.88 and 0.90 ± 0.74 days on chickpea, while 2.50 ± 0.71, 5.10 ± 1.10 and 0.60 ± 0.70 days on cabbage host, respectively. The maximum mean fecundity was 229.10 ± 16.26 eggs per female on chickpea, whereas, minimum with 191.70 ± 10.76 eggs per female on cabbage host. The sex ratio of male to female was observed as 1: 0.87, 1: 0.85 and 1: 0.81 on chickpea, tomato and cabbage, respectively. On the basis of growth index, chickpea (3.59) was most preferred host, while tomato (3.42) was intermediate and cabbage (3.09) the least preferred host for H. armigera.
Key words: Helicoverpa armigera, biology, host, Gujarat.
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782
Cite this article: Rabari, G.N., Pareek, A. and Patel, B.R., Comparative Biology of Helicoverpa armigera (Hubner)Reared on Different Hosts, Int. J. Pure App. Biosci. 5(1): 849-856 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2482
