Zobrazeno 1 - 10
of 15
pro vyhledávání: '"G. C. Ullyett"'
Autor:
G C, ULLYETT, J S, VAN DER MERWE
Publikováno v:
Journal of the Entomological Society of Southern Africa. 10(1)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::fe430971c853f4695052476813add87e
https://pubmed.ncbi.nlm.nih.gov/20266388
https://pubmed.ncbi.nlm.nih.gov/20266388
Autor:
F. S. Parsons, G. C. Ullyett
Publikováno v:
Bulletin of Entomological Research. 25:349-381
SummaryMethods have been devised and applied to an intensive study of the course of illworm activity on numerous rain-grown and irrigated crops. These were developed the first instance to enable accumulation of data considered essential for evaluatin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0e4d2355a513a2eb41612e37630f37bb
https://doi.org/10.1017/s0007485300012748
https://doi.org/10.1017/s0007485300012748
Autor:
G. C. Ullyett
Publikováno v:
The Canadian Entomologist. 81:285-299
In a previous paper (Ullyett, 1949). the present writer outlined a tentative classification of insects serving as hosts to entomophagous parasites. This scheme was based upon the more obvious relationships that exist between parasite and host insect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ef503fbc5ac1e107b8ed1bd4f8208c3f
https://doi.org/10.4039/ent81285-12
https://doi.org/10.4039/ent81285-12
Autor:
G. C. Ullyett
Publikováno v:
The Canadian Entomologist. 82:1-11
The results obtained in the experiments just described indicate that the discriminative ability of the female parasite operates to enable the parasite to distinguish between hosts which have been parasitized previously, not only by itself but by othe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a324a6dda57d489de38f507d412be38
https://doi.org/10.4039/ent821-1
https://doi.org/10.4039/ent821-1
Autor:
G. C. Ullyett
Publikováno v:
Bulletin of Entomological Research. 26:253-262
1. Apanteles sesamiae, Cam., is the only parasite of Busseola fusca, Fuller, which is of importance in the Eastern Transvaal.2. The adult is described, and the morphology of the last stage larva of the parasite is discussed in detail.3. The biology a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67733179ccd492d513b4fb334af50b31
https://doi.org/10.1017/s0007485300038189
https://doi.org/10.1017/s0007485300038189
Autor:
G. C. Ullyett
Publikováno v:
Proceedings of the Royal Society of London. Series B - Biological Sciences. 120:253-291
Microplectron fuscipennis , Zett., appears to be restricted for its host material to the European species of the Tenthredinid genus Diprion , Schrank. It has been recorded from D. sertifer , Geoffr., D. pini , L., D. pallidus , Kl., and, recently, fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a93cb1166e3ccae061740c5e6ad68f7
https://doi.org/10.1098/rspb.1936.0035
https://doi.org/10.1098/rspb.1936.0035
Autor:
F. S. Parsons, G. C. Ullyett
Publikováno v:
Bulletin of Entomological Research. 27:219-235
Some of the problems involved in the estimation of parasitism in populations of Heliothis eggs are discussed:—(a) Effective parasitism of the “active fraction” of eggs as laid in situ is denned.(b) The habits of the egg-laying moth in point of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::633114cb99809bdd3c5244364d4bf19a
https://doi.org/10.1017/s0007485300058429
https://doi.org/10.1017/s0007485300058429
Autor:
G. C. Ullyett
Publikováno v:
Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 234:77-174
Competition for food among larval populations of sheep blowflies constitutes an important factor limiting the general fly population in nature. Both intra- and interspecific competition take place on carrion. In South Africa the main species of flies
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14688974cc7f1ff03c1807e3e0c283e1
https://doi.org/10.1098/rstb.1950.0001
https://doi.org/10.1098/rstb.1950.0001
Autor:
G. C. Ullyett
Publikováno v:
Bulletin of Entomological Research. 27:195-217
1. The influence of atmospheric humidity on the various stages in the life-cycle of Microplectron fuscipennis, Zett., is examined. Both the longevity of the adults and the extent of oviposition are found to be proportional to the saturation deficienc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dced017d2fdc67b1646a56f2e7604a72
https://doi.org/10.1017/s0007485300058417
https://doi.org/10.1017/s0007485300058417
Autor:
G. C. Ullyett
Publikováno v:
The Canadian Entomologist. 81:25-44
The efficiency of an entomophagous parasite may be defined as the capacity which it possesses for distributing its eggs among the available host population in such a manner that its progeny have the best possible chance of survival. This capacity is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01451e99ee108f8fe07ba038cbd6448a
https://doi.org/10.4039/ent8125-2
https://doi.org/10.4039/ent8125-2