Field and laboratory studies on the behaviour of the carrot fly, Psila rosae

Abstract A new distribution map is provided for Psila rosae (Fabricius). Diptera: Psilidae (carrot fly, carrot rust fly). Attacks carrot, parsnip, celery. Information is given on the geographical distribution in Europe, Austria, Belgium, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Ireland, Italy, Netherlands, Norway, Poland, Spain, Sweden, Switzerland, Turkey, United Kingdom, CIS (former USSR), European CIS, Georgia, Latvia, Leningrad area, Russia, Amur region, Khabarovsk, Primorsk, Sakhalin, Ukraine, Asia, Mongolia, Australasia, New Zealand, North America, Canada, Alberta, British Columbia, New Brunswick, Newfoundland, Nova Scotia, Ontario, Prince Edward Island, Quebec, USA, California, Connecticut, Maine, Massachusetts, Michigan, New Hampshire, New York, Ohio, Oregon, Pennsylvania, Washington.

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The sensory receptors of the carrot fly larva, Psila rosae (F.) (Dipt., Psilidae)

Bulletin of Entomological Research ◽

10.1017/s0007485300005435 ◽

1973 ◽

Vol 62 (4) ◽

pp. 545-548 ◽

Cited By ~ 12

Author(s):

M. F. Ryan ◽

M. Behan

Keyword(s):

Root Hairs ◽

Sensory Receptors ◽

Campaniform Sensilla ◽

Psila Rosae ◽

Basiconic Sensilla ◽

Carrot Fly ◽

Electron Microscopes ◽

Scanning Electron Microscopes ◽

Scanning Electron

Examination of the cephalic lobes of larvae of Psila rosae (F.) by means of light and scanning electron microscopes revealed the presence of 24 sensilla, ten campaniform, eight basiconic, four ampullaceous and two styloconic. By comparison with the known functions of similar sensilla in other insects, it is suggested that the ampullaceous and basiconic sensilla respond to plant emanations in soil, air and water, respectively, and that styloconic sensilla determine the palatability of the root hairs; the role of the campaniform sensilla is obscure.

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Diapause and overwintering of the carrot fly, Psila rosae (F.) (Diptera: Psilidae)

Bulletin of Entomological Research ◽

10.1017/s0007485300010099 ◽

1981 ◽

Vol 71 (4) ◽

pp. 583-590 ◽

Cited By ~ 12

Author(s):

A. J. Burn ◽

T. H. Coaker

Keyword(s):

Adult Emergence ◽

Early Spring ◽

Pupal Weight ◽

Prepupal Stage ◽

Psila Rosae ◽

Carrot Fly ◽

Soil Temperatures ◽

Similar Temperature ◽

Effects Of Temperature ◽

Diapause Development

AbstractPsila rosae (F.) overwinters in Britain in both the larval and pupal stages. Overwintering pupae formed in October and November at soil temperatures of between 10 and 16°C entered diapause. A period of similar temperature in the laboratory during the prepupal stage also caused pupae to enter diapause. Overwintering larvae continued to feed and gain weight; they pupated in early spring at soil temperatures of 2–8°C but did not enter diapause. The sensitivity to diapause-inducing conditions decreased between November and March, associated with changes in developmental temperatures and pupal weight. The differential effects of temperature on larval, pupal and diapause development together serve to synchronise adult emergence from the overwintering population. The mechanisms which allow overwintering by a variable proportion of larvae and pupae also provide the opportunity for the development of a third generation of adult flies in October and November.

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