The oriental fruit moth, Grapholita molesta (Busck), stands out as one of the most important pest in Rosaceae orchards in Brazil. During feeding, caterpillars bore into shoots, branches and fruits, impairing the commercial production. This work aimed to study the effect of endogenous factors in the chemical perception and in the species chemotactic behavior, seeking to optimize monitoring and the behavioral control of this pest. We evaluated male electroantennographical (EAG) and chemotactical (olfactometry) responses to the synthetic sex pheromone in different ages, virgins or mated and fed or unfed. The EAG responses of males did not differ for all evaluated factors. Nevertheless, the chemotactical behavior of males seems to decrease with age, not varying as a function of mating or feeding conditions. The knowledge about the interference of these factors in G. molesta may help with the interpretation of field results, allowing the development of suitable and reliable control measures based on infochemicals for behavioral control.

A biologia de Holhymenia rubiginosa Breddin, em maracujazeiro-doce, Passiflora alata é descrita e são avaliados o tempo de desenvolvimento, a viabilidade e as exigências térmicas embrionárias, a duração e a mortalidade na fase ninfal, assim como a longevidade e os parâmetros reprodutivos. Os insetos foram criados em laboratório, em condições controladas (25 ± 1°C, 65 ± 10% UR, fotofase 12h), alimentados com ramos de P. alata e solução de mel a 20% e pólen. A temperatura base estimada para a fase embrionária foi de 10,8°C e a constante térmica 140,8 GD, determinadas para fase de ovo usando quatro temperaturas (17, 21, 25 e 30 ± 1°C). A duração média, em dias, e a viabilidade da fase de ovo foram de 25,4 ± 0,45 (88%); 13,2 ± 0,28 (88%); 8,8 ± 0,16 (94%) e 7,7 ± 0,17(92%), nas temperaturas de 17, 21, 25 e 30 ± 1°C, respectivamente. Quando criado a 25 ± 1°C, o primeiro ínstar teve o menor tempo de desenvolvimento (4,01 ± 0,02 dias) e o segundo o mais longo (15,7 ± 3,50 dias), além de ser o que apresentou maior mortalidade (75%). Machos e fêmeas tiveram longevidade similar (185,3 ± 17,52 dias para fêmeas e 133,6 ± 18,94 dias para machos). Fêmeas copularam 33,0 ± 7,71 vezes, com duração média de 99,0 ± 9,25 minutos, ovipositando 11,5 ± 2,55 ovos. Períodos de pré-oviposição, oviposição e pós-oviposição foram, respectivamente, 96,4 ± 18,08; 88,5 ± 23,48 e 19,3 ± 12,18 dias.

The biology of Holhymenia rubiginosa Breddin is described on sweet-passion-fruit, Passiflora alata, and the developmental time, viability and thermal requirements of the egg stage, the developmental time and mortality of the nymphal stage, and adult longevity and reproductive parameters were assessed. Insects were reared at laboratory controlled conditions (25 ± 1°C, 65 ± 10% RH, photophase 12h) on branches of P. alata, 20% honey solution and pollen. The lower thermal threshold (10.8°C) and thermal requirements (140.8 DD) for egg development were determined using four temperatures (17, 21, 25 and 30°C). The average egg development time (days) and viability were 25.4 ± 0.45, 88%; 13.2 ± 0.28, 88%; 8.8 ± 0.16, 94%; and 7.7 ± 0.17, 92%, at 17, 21, 25 and 30 ± 1°C, respectively. When reared at 25 ± 1°C, the first instar had the shortest development time (4.0 ± 0.02 days) and the second the longest (15.7 ± 3.50 days), which also had the highest mortality (75%). Males and females had similar longevity (185.3 ± 17.52 days for females and 133.6 ± 18.94 days for males). Females mated 33.0 ± 7.71 times, with a mean duration of 99.0 ± 9.25 min, laying 11.5 ± 2.55 eggs/female. Periods of pre-oviposition, oviposition and post-oviposition were respectively 96.4 ± 18.08; 88.5 ± 23.48 and 19.3 ± 12.18 days.