Moraes, G.J. de, McMurtry, J.A., 1987.
Effect of temperature and sperm supply on the reproductive potential of Tetranychus evansi (Acari: Tetranychidae). Experimental and Applied Acarology, 3: 95-107.
Abstract
The biology of Tetranychus evansi was studied at 5 different temperatures on excised leaves of Solanum douglassi. The theoretical lower threshold temperature of development was about 13 deg C. The combined immature stages required about 148 day-degrees for completion. Progressively later initiation of mating resulted in higher peak proportions of females produced, up to an 8-day period between emergence, mating at 30 deg C. The proportion of male offspring always increased towards the end of the oviposition period, apparently because of sperm depletion. The calculated intrinsic rate of increase was highest (0.432) at 35 deg C, the highest temperature tested. At the same temperature, daily oviposition rate and net reproductive rate were maximum (9.5 and 111.77, respectively), and mean generation time and doubling time were minimum (10.92 and 1.6 days, respectively).
