Pheromone response and sexual behviour of Cephalcia lariciphila Wachtl (Hymenoptera: Pamphiliidae)

Abstract

1. Trapping experiments and observations of sexual behaviour were made on Cephdciu laridphila in infested larch forests in Hereford and Worcester and Mid-Glamorgan in early May 1977.2. The results indicated that virgin females and dichloromethane extract of crushed virgin females were highly attractive to males.3. On 17 May males responded to females throughout the warmest part of the day. First response occurred before 09.00 hours, the last after 17.00 hours and peak activity was from 11 -00 to 14.00 hours.4. Mated females became unattractive to males within 10 min after mating. When mated females or males were paired with virgin females there was no evidence of an anti-attractive pheromone or pheromone mask. 5.A few males dispersed out of larch into adjacent spruce forests and were captured in virgin female-baited traps up to 135 m distant from infested larch. Virgin female-baited traps at 0-05 m from the ground captured over seven times the number of males as traps at 1,2 or 4 m, supporting visual observations that the preferred flight level for males is very near the ground.6. Horizontal board traps with an acetate surface coated with 'Stikem Special' were superior to Pherocon lC, vertical board and gypsy moth traps in that order.7. The observations and results suggest that the best applied uses of C.lariciphi[a pheromone would be in survey and detection, and male disruption techniques.

Sex Pheromone of the Pine False Webworm Acantholyda erythrocephala

“…Male behaviors included antennation, upwind flight, and courtship behavior that involved abdominal flexing accompanied by substrate vibration (Staples 1999). These responses were similar to laboratory and field data from another Pamphilliid sawfly, the web-spinning larch sawfly, Cephalcia lariciphila, in response to female derived odors and to a likely pheromone component, ortho-aminoacetophenone (Borden et al 1978;Baker et al 1983).…”

Functional morphology of the male genitalia and copulation in lower Hymenoptera, with special emphasis on the Tenthredinoidea s. str. (Insecta, Hymenoptera, ‘Symphyta’)

“…This explains the specimen of A [ cantholyda ] burkei with the genitalia rotated 180° found by Middlekauff (1958) who adds that it was taken in copula. However, mated males of C. fascipennis and other species, when mating terminated naturally, had their genitalia returned to the upright position of orthandrious sawflies.’ and by Borden et al . (1978) in Cephalcia lariciphila (Wachtl 1898) or C. alpina (Klug 1808): ‘… the female turned head‐to‐head with the male, then both turned or moved past each other and coupled tail‐to‐tail.’…”

Spatial distribution of flying neodiprion sertifer (hymenoptera, diprionidae) males in a mature pinus sylvestris stand as determined by pheromone trap catch

“…The pattern of spatial distribution of adults within stands results from reaction of the insects to biotic and abiotic factors reflecting partly their life strategy. The height above ground is important and its influence on trap catch has been demonstrated for Cephalcia lariciphila Wachtel (Hymenoptera: Pamphiliidae) (Borden et al 1978) and other forest insects (e.g. Cuthbert & Peacock 1975, Dix & Doolittle 1985, Byers et al 1989.…”