author(s)
MK Ghelani, BB Kabaria, YH Ghelani, KD Shah and MF Acharya

abstract
The whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) are small and soft bodied polyphagous pest distributed widely in tropical and subtropical regions of India. Both the nymphs and adults of B. tabaci cause direct as well as indirect damages to tomato. The present investigation was conducted to study the whitefly biology on tomato plants under laboratory condition at Department of Entomology, College of Agriculture, Junagadh Agricultural University, Junagadh during 2019-20. The average incubation period, hatching per cent (%), first, second, third & fourth instar (pupal) and total nymphal period of B. tabaci were 7.04 ± 0.52, 65.11 ± 7.31, 3.99 ± 0.20, 2.78 ± 0.23, 2.81 ± 0.26 & 3.64 ± 0.41 and 13.22 ± 1.10 days, respectively. The pre-oviposition, oviposition and post-oviposition periods were 1.41 ± 0.20, 2.17 ± 0.27 and 1.11 ± 0.16 days, respectively. The longevity & entire life span of male and female was 3.41 ± 0.37 & 25.16 ± 1.26 and 5.74 ± 0.49 & 27.48 ± 1.30 days, respectively.