Effect of different constant temperatures on the development and reproduction of Bemisia tabaci (Genn.) (Hom.: Aleyrodidae)

Abstract :

The development, survivorship and reproduction of Bemisia tabaci were studied. Experiments were conducted in a growth chamber under 55 ± 5% RH and 16:8 h (L: D) photoperiod on caged plants of tomato, Lycopersicon esculentum Mill. (Var. Chef) at four constant temperatures (20, 24, 28, and 32°C) in Kerman. The developmental periods from egg to adult varied from 29.14 days at 20°C to 13.836 days at 32°C. The developmental periods of nymphs varied from 16.68 days at 20°C to 6.74 days at 32°C and the developmental periods of pupa stage varied from 5.53 days at 20°C to 2.34 days at 32°C. Survivorships from egg to adult were 82.71% at 28°C, 79.73% and 82.46% and 58.94% at 20, 24 and 32°C respectively. The average longevity of females ranged from 17.64 days at 20°C to 6.64 days at 32°C and males lived an average of 12.52 days at 20°C to 5.42 days at 32°C. The number of eggs per day per female ranged from 2 to 8 and the average number of eggs laid per female per day varied from 6.8 at 28 °C to 4.92 at 32°C. The average number of eggs per female varied from 92.58 eggs at 24°C to 44.74 eggs at 32°C. Both the longevity and oviposition of B. tabaci females at different temperatures were significantly different (P < 0.05)

Keyword :

Bemisia tabaci, reproduction, temperature, survivorship, Kerman

Author(s) : Takalloozadeh, H. M.
Downloads : 1758
Published Issue : 2012 Vol. 7 Number 2

2012 Vol. 7 Number 2