Abstract

DUARTE, Leticia; MARTINEZ, María de los Ángeles  and  PAES BUENO, Vanda Helena. Biology and population parameters of Tuta absoluta (Meyrick) under laboratory conditions. Rev. Protección Veg. [online]. 2015, vol.30, n.1, pp. 19-29. ISSN 2224-4697.

The aim of this work was to determine the temperature effect on Tuta absoluta (Meyrick) biological development. Its biological and population parameters were evaluated on the Cuban tomato (Solanum lycopersicum L.) cultivar Vyta at temperatures of 25±1^oC and 20/30±1^oC under controlled conditions. The duration (in days) of the egg, larval and pupal stages and reproductive periods, as well as the sex ratio, the viability of eggs and pupae (in per cent), total fecundity/female and longevity obtained at different temperature regimens were compared between treatments by ANOVA with Mann-Whitney test (p<0.05). The larval survival (in per cent) was compared between treatments by ANOVA with Bonferroni test (p<0.05).Only the egg stage and the pre-oviposition period were longer with 20/30^oC (p <.0001). Viability of the pupae was higher at (25^oC) (p=0.0121).The larval survival was affected negatively with 32.14 and 20% at 25^oC and 20/30^oC, respectively (p=0.0206). The survival curves for larvae and female adults in both conditions were of type II. The survival of females subjected to (20/30^oC) was three days longer, but without significant differences between treatments. The total fecundity/female and longevity were not affected. The specific fecundity (m_x) in both temperatures was more stable in a range of 0.8-1.0 until the 10 days of age. The population growth parameters of T. absoluta R_o, T, r_m, TD and (l) were 9.36, 8.90, 5.52, 5.75, 0.02, 0.01, 34.64, 117.01, and 1.02, 1.01 at 25^oC and 20/30^oC, respectively. The biological and population parameters of T. absoluta on the tomato Vyta cultivar were influenced by the temperature in the test, and, as a consequence, the development of the pest was limited under the laboratory conditions. In addition, indications of Vyta as a possible resistant cultivar versus the pest were shown under the temperature regimen studied.

Keywords : leaf miner; host plant resistant; Solanum lycopersicum.

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