The Effect of Insecticides on Trybliographa rapae West. (Hymenoptera: Cynipidae), a Parasite of the Cabbage Root Fly Hylemya brassicae (Bouché)1

2009 ◽  
Vol 73 (1-4) ◽  
pp. 93-102 ◽  
Author(s):  
Sherif A. Hassan
Keyword(s):  
Trybliographa Rapae ◽  
Cabbage Root Fly ◽  
Hylemya Brassicae

Delia radicum. [Distribution map].

1983 ◽  
Author(s):  
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Host Plants ◽  
Delia Radicum ◽  
Distribution Map ◽  
Cabbage Root Fly ◽  
Hylemya Brassicae ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Delia radicum (L.) (Hylemya brassicae(Bch.)) (Dipt., Anthomyiidae) (Cabbage root fly). Host Plants: Brassica spp. Information is given on the geographical distribution in EUROPE (excl. USSR), Austria, Azores, Belgium, Britain, Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Poland, Romania, Spain, Sweden, Switzerland, Yugoslavia, ASIA (excl. USSR), Israel, Turkey, USSR, AFRICA, Madeira, Morocco, NORTH AMERICA, Canada, USA.

Spectral sensitivity and visual conditioning in the parasitoid wasp Trybliographa rapae (Hymenoptera: Cynipidae)

1998 ◽  
Vol 88 (3) ◽  
pp. 239-245 ◽  
Author(s):  
P.E. Brown ◽  
C.P. Frank ◽  
H.L. Groves ◽  
M. Anderson
Keyword(s):  
Spectral Sensitivity ◽  
Parasitoid Wasp ◽  
Specific Function ◽  
Colour Discrimination ◽  
Trybliographa Rapae ◽  
Cabbage Root Fly ◽  
Conditioning Period ◽  
Fly Larvae

AbstractSpectral sensitivity of the wasp Trybliographa rapae (Westwood), a parasitoid of cabbage root fly larvae, was measured by the electroretinogram (ERG) technique and by a complimentary behavioural technique, to 15 selected wavelength bands from 340 to 670 nm. Peaks of electroretinogram sensitivity were found in the ultraviolet, blue and green-yellow regions of the spectrum. This corresponds to known classes of photoreceptor present in the Hymenoptera. Behavioural peaks of phototactic attraction were found in the ultraviolet and green-yellow regions, but not in the blue. No differences were observed between the sexes. We suggest that ultraviolet and green-yellow wavelengths initiated ‘escape’ and ‘foliage’ orientated behaviour respectively. Blue wavelengths appear to have a less specific function but may be important for colour discrimination. Blue wavelengths did, however, become significantly more attractive to female wasps after a pre-experimental conditioning period involving exposure to blue wavelengths in combination with swede infested with cabbage root fly larvae. Thus T. rapae has been demonstrated to show plasticity in its visually motivated behaviour. This may prove advantageous in the development of an artificial egg collecting technique for this species.

Host-stage selection by Trybliographa rapae, a parasitoid of the cabbage root fly Delia radicum

2000 ◽  
Vol 96 (3) ◽  
pp. 231-237 ◽  
Author(s):  
Nathalie Neveu ◽  
Liliane Krespi ◽  
Nabila Kacem ◽  
Jean-Pierre Nenon
Keyword(s):  
Delia Radicum ◽  
Trybliographa Rapae ◽  
Cabbage Root Fly ◽  
Host Stage

Parasitism of overwintering pupae of cabbage root fly, Delia radicum (L.) (Diptera: Anthomyiidae), in England and Wales

1984 ◽  
Vol 74 (1) ◽  
pp. 79-86 ◽  
Author(s):  
S. Finch ◽  
Rosemary H. Collier
Keyword(s):  
Population Dynamics ◽  
Delia Radicum ◽  
Aleochara Bilineata ◽  
England And Wales ◽  
Trybliographa Rapae ◽  
Cabbage Root Fly

AbstractIn populations of overwintering pupae of Delia radicum (L.) collected from ten sites in England and Wales, parasitism varied from 0% at Newcastle to 42% at Evesham. Unlike their hosts, few of the parasites were in extended diapause. Irrespective of when collected at Wellesbourne, emergence of 50% of the ichneumonid parasite Phygadeuon trichops Thoms., the eucoilid parasite Trybliographa rapae (Westw.) and the staphylinid parasite Aleochara bilineata Gylh. occurred after 14, 21 and 28 days, respectively, at 20°C. Early-emerging populations of D. radicum were more heavily parasitised than intermediate- or late-emerging populations. During the winters of 1979–80, 1980–81 and 1981–82, T. rapae and A. bilineata emerged in similar numbers from 37% of the field-collected pupae from Wellesbourne. Less than 1% of the pupae were parasitised by P. trichops. D. radicum adults emerged from a further 25% of the pupae, and the remainder, approximately 38%, were dead. Most dead pupae were recovered from heavily parasitised populations. When parasites were present in high numbers, many of their progeny probably died from multiple parasitism and superparasitism. Comparison with earlier studies indicated that parasitism should be expressed as a percentage of the total pupae, and not just as a percentage of the living insects, if the data are subsequently to be of use for studies on the population dynamics of this pest.

Phygadeuon trichops Thoms. (Hymenoptera: Ichneumonidae), an Occasional Parasite of Hylemya spp. (Diptera: Anthomyiidae)

1956 ◽  
Vol 88 (2) ◽  
pp. 69-73 ◽  
Author(s):  
A. Elizabeth Monteith
Keyword(s):  
Life Histories ◽  
Aleochara Bilineata ◽  
Trybliographa Rapae ◽  
Hylemya Brassicae ◽  
Preferred Hosts

In extensive surveys for parasites of Hylemya brassicae (Bouché), H. floralis (Fall.), and H. cilicrura (Rond.) on cruciferous crops in Canada and Europe, observations were made on the life-histories and behaviour of the parasites. Accounts of the two most abundant parasites, Aleochara bilineata Gyll. and Trybliographa rapae (Westw.), have already been published, the former by Colhoun (1953) and the latter by Wishart and Monteith (1954). The present paper deals with one of the minor parasites, Phygadeuon trichops Thoms. In the surveys this parasite was found in Norway, Holland, and Scotland but in such small numbers as to indicate that it has other, preferred hosts and that it only occasionally attacks Hylemya spp. Phygadeuon fumator (Grav.) was reared from Hylemya sp. from France and is recorded in the literature from Hylemya spp. in Russia (Meier, 1927; Vodinskaya, 1928) and in England (Wadsworth, 1915). No references were found to P. trichops from Hylemya spp. and no accounts of the biology of either species.

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