Aspectos biológicos da Traça-da-Batatinha Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)

Abstract

RESUMOAlgumas características biológicas de Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) criadas em tubérculos de batata, foram estudadas em laboratório a 25 ± 1ºC, 70 ± 10% de umidade relativa e fotofase de 14 horas. A longevidade dos machos foi de 33,4 dias e das fêmeas foi de 31,7 dias, a sobrevivência foi de 100% até o sexto dia para ambos os sexos, e o número médio total de ovos por fêmea de P. operculella foi 195, com viabilidade de 46,3%, quando esses foram alimentados com solução de mel a 10%.Palavras-chave: biologia, praga, batata. ABSTRACTSome biologic characteristics of Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) reared in potato tubers was studied in laboratory at 25 ± 1ºC, relative humidity of 70 ± 10% and photophase of 14 hours. The male longevity it was 33.4 days and the female longevity it was 31.4 days, the survivor it was 100% until the 6 o day for both sex, the total number of eggs per female of P. operculella it was 195, with viability of 46.3%, when these adults received a solution of honey at 10%.

Adult carbohydrate feeding affects reproduction of Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae)

“…According to Pratissoli et al (2003), the largest number of eggs was laid soon after the beginning of the oviposition period, as expected, in both groups. Despite similar female oviposition rates under both feeding diets, mates fed only on distilled water laid fewer eggs than those fed on honey solution (Wilcoxon Rank Sum Test, W = 485; P = 0.0019).…”

“…It is also a pest to several other cultivated Solanaceae species, such as eggplant, pepper, tobacco and tomato (Filgueira 2003a, b). According to Pratissoli et al (2003), the adults oviposit generally up to ten days after mating, and the adult life cycle may be extended to 43 days, with females surviving for longer periods.Although food resources for reproduction of most insects depend on the nutrients accumulated during the larval stage, many lepidopteran species show feeding habits in the adult stage (Chapman 1998). Food intake at the adult stage allows the utilization of carbohydrate and amino acid rich solutions which may be necessary to complete the development of the reproductive system.…”

“…A stock colony was initiated with insects 316 Jordão et al -Adult Carbohydrate Feeding Affects Reproduction of Phthorimaea operculella (Zeller)... obtained from infested potatoes, Solanum tuberosum L., collected after harvesting. Rearing was conducted following procedures established by Pratissoli et al (2003), under controlled conditions (25 ± 1°C, 70 ± 10% RH, and 14h photophase). The obtained pupae were transferred into cages covered with a white organza cloth until adult emergence.…”

“…It is also a pest to several other cultivated Solanaceae species, such as eggplant, pepper, tobacco and tomato (Filgueira 2003a, b). According to Pratissoli et al (2003), the adults oviposit generally up to ten days after mating, and the adult life cycle may be extended to 43 days, with females surviving for longer periods.…”

Controle de Phthorimaea operculella (Zeller, 1873) (Lepidoptera: Gelechiidae) com Trichogramma atopovirilia Oatman & Platner, 1983 (Hymenoptera: Trichogrammatidae) em batata, em condições de campo e no armazém

“…Os parasitóides, recém emergidos, foram liberados, em copos plásticos, no ponto central dos círculos, mantendo-se a proporção de 16 adultos do parasitóide por ovo(PRATISSOLI et al 2005). As liberações foram feitas quando a planta se encontrava no estádio fenológico 3, caracterizado pelo desenvolvimento acelerado da parte aérea.…”