|Ovariole development in the white-pine weevil, Pissodes strobi (Coleoptera: Curculionidae)|
Harman, D.M.; Kulman, H.M. (1967). Ovariole development in the white-pine weevil, Pissodes strobi (Coleoptera: Curculionidae). An. Entomol. Soc. Am. 60(6): 1146-1150
In: Annals of the Entomological Society of America. Entomological Society of America: College Park, Md.. ISSN 0013-8746; e-ISSN 1938-2901
Coleoptera [WoRMS]; Curculionidae Latreille, 1802 [WoRMS]; Pissodes strobi; Marien
|Auteurs|| || Top |
- Harman, D.M.
- Kulman, H.M.
Ovariole development and termination of diapause in adult white-pine weevils, Pissodes strobi (Peck), of known age were studied by dissection and photographically recorded. Old-generation adults brought into the laboratory in early November produced viable eggs within 5 days. New-generation adults brought into the laboratory during this same period also produced viable eggs. Viable eggs were deposited by other new-generation adults after 10-15 clays at room temperature in winter. On each of the 3 collection dates studied, a new-generation adult produced viable eggs without copulating after collection from hibernation, indicating that copulation occurred in the fall. New-generation adults which were isolated as soon as they emerged in July and August and maintained at 75°±1O°F had poorly developed ovarioles by November 20 and did not produce eggs. These observations confirm reports that diapause is obligatory in the white-pine weevil, but indicate that the temperature requirement for breaking diapause is satisfied by early November.