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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 7, Special Issue 1 (2018)

Population dynamics and biology of whitefly (<em>Bemisia tabaci Gennadius</em>) on sunflower (<em>Helianthus annuus</em> L.)

Author(s):

RD Solanki and S Jha

Abstract:
A sunflower hybrid (KBSH 1) was sown on three different dates of sowing (third week of December, third week of January and third week of February) at Central Research Farm (CRF), BCKV, Gayeshpur and Farmers field. Among the three different dates of sowing, the population of whitefly (<em>Bemisia tabaci</em> Gennadius) (Homoptera: Aleyrodidae) was always higher on first date of sowing followed by intermediate and late sown crop. During first year the whitefly population reached its peak with population load of 5.08, 3.52 and 3.05/leaf at CRF and 6.49, 5.44 and 4.63/leaf at Madandanga farm on second week of February, first week of March and fourth week of March respectively. During second year the whitefly on sunflower, reached its peak with population load of 5.27, 4.45 and 3.71/leaf at CRF and 8.79, 7.29 and 5.21/leaf at Madandanga field on second week of February, first week of March and fourth week of March respectively. Life history of <em>B. tabaci</em> was studied under laboratory condition (ranged 22 to 29<sup>0</sup>C and RH, 75±5%) on sunflower at Plant Health Clinic, BCKV, Nadia, West Bengal. The average developmental period of eggs, first, second, third and fourth instars of whitefly on sunflower were 8.80±1.14, 2.10±0.57, 4.90±0.74, 5.60±0.97 and 6.90±1.29 days respectively, with total nymphal period of 19.40±2.50; Fecundity, 27±2.70 eggs/female; adult longevity (male: 4.30±0.82, female: 5.40±0.97 days). However, the pre-oviposition period lasted for 1.20±0.42 days, oviposition 3.60±0.70 days and post-oviposition 0.60±0.70 days, respectively. Average length for the stages were (mean±SD) egg, 0.22±0.010; first instar, 0.29±0.013; second instar, 0.43±0.024; third instar, 0.69±0.022 and fourth instar, 0.84±0.017 mm respectively.

Pages: 3055-3058  |  1630 Views  602 Downloads

How to cite this article:
RD Solanki and S Jha. Population dynamics and biology of whitefly (<em>Bemisia tabaci Gennadius</em>) on sunflower (<em>Helianthus annuus</em> L.). J Pharmacogn Phytochem 2018;7(1S):3055-3058.

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