Modelling temperature‐dependent bionomics of Bemisia tabaci (Q‐biotype)

Abstract

The influence of temperature (17, 21, 25, 30 and 35 °C) on life-history traits of a Q-biotype Bemisia tabaci population on tomato is studied. Temperaturedependent relationships are characterized for immature developmental rate, immature survival, fecundity, longevity and intrinsic rate of increase. Development time vary from 20 days at 30 °C to 56 days at 17 °C and the lowest thermal threshold is estimated at 10.2 °C. The optimal temperature for immature development is 32.5 °C. Total fecundity (eggs per female) ranges from 105.3 (at 21 °C) to 41 (at 35 °C). The longevity decreases with temperature increase. The intrinsic rate of increase ranges from 0.0450 (at 17 °C) to 0.123 (at 30 °C). The functional relationships between temperature and life-history parameters are used to evaluate the effect of temperature on the population dynamics. Such mathematical relationships could provide a basis for future development of population models.

Biological traits and Life table parameters A and B biotype of Bemisia tabaci (Genn.) on cotton and rapeseed

“…Yee and Toscano (1996) reported the range of 40.6 -70.6 eggs for alfalfa, broccoli, cantaloupe, zucchini and cotton at 27°C. The intrinsic rate of natural increase (r m ) of B biotype and A reared on cotton (0.1033 and 0.1010, respectively) in present study were almost equal to r m for Q-biotype of B. tabaci reared on tomato (0.106) at 25 ± 1ºC, 60 ± 5% RH and L14:D10 h (Bonato et al 2007). …”

Genetic structure of the invasive pest Bemisia tabaci: evidence of limited but persistent genetic differentiation in glasshouse populations

“…Similarly, it is possible that the high insecticide pressure within French glasshouses may have selected for group Q populations rather than group B. In addition, the developmental studies done on French group Q populations showed a greater tolerance to both hot and cold conditions than reported for group B (Bonato et al, 2007). Therefore, both extreme temperature tolerance and insecticide resistance might have favoured (alone or in combination) the development of group Q individuals to the detriment of group B individuals and could reasonably account for the predominance of group Q we observed in glasshouses in southern France.…”

“…The predominance of group Q and the putative displacement of group B, which is more sensitive to pesticide spraying, are additional pieces of evidence that human activities deeply impact the population genetics of B. tabaci in southern France. Furthermore, the putative higher tolerance of group Q populations to extreme temperature conditions (Bonato et al, 2007) can foster its further spread northward in Europe, due to better outdoor survival. These data are of primary importance for prophylactic policies against the spread of this invasive pest throughout the world.…”

Traits related to biological invasion: A note on the applicability of risk assessment tools across taxa

“…Growth rate Invasive insects have rapid growth rates compared to natives (Labrie et al 2006, Ward andMasters 2007) A, O Preimaginal (pre-adult) development time Invasive insects have shorter preimaginal development time than natives (Cervo et al 2000, Gamboa et al 2004, Boman et al 2008, Delatte et al 2009); Invasive insects have a longer preimaginal development time than natives (Bonato et al 2007) A, E, O…”

“…Temperature tolerance Invasive insects have lower temperature tolerance than natives (Wuellner and Saunder 2003, Bonato et al 2007, Peacock and Worner 2008, Delatte et al 2009, McGrannachan and Lester 2013, Parkash et al 2014;…”