Zobrazeno 1 - 10
of 28
pro vyhledávání: '"F. J. H. Fredeen"'
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 108:591-600
The larvae of Simulium arcticum Malloch in three collections from the North Saskatchewan River of May and June 1969, 1971, and 1974 showed seven instars. The first instar larva possessed an egg burster and the seventh instar larva possessed separated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b51f72e3cc363613e1a7e7073a4a2fc2
https://doi.org/10.4039/ent108591-6
https://doi.org/10.4039/ent108591-6
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 113:161-165
Seven larval instars were reliably detected for S. luggeri N. and M. by measuring the length of the postgena. Instars were less reliably separated by the length of the whole larva. The number of rows of posterior hooklets also separated all instars,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::422a43cc4d29bd1d40943b28c24eeec5
https://doi.org/10.4039/ent113161-2
https://doi.org/10.4039/ent113161-2
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 107:807-817
A single 7.5-min injection of 0.6 p.p.m. of methoxychlor into the North Saskatchewan River eliminated 100% of instars 3 to 6 inclusive of the larvae of Simulium arcticum Mall, from sites 40 and 80 km downstream, 91% at 121 km, and 66% at 161 km. Nine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bea86d9b8ad0b45b1d7433c3dd6d4124
https://doi.org/10.4039/ent107807-8
https://doi.org/10.4039/ent107807-8
Autor:
F. J. H. Fredeen, G. E. Shewell
Publikováno v:
The Canadian Entomologist. 90:733-738
The material on which the following descriptions are based was collected by the junior author during a study of the life-histories and ecologies of the Simuliidae of the Prairie Provinces. The type locality for both forms is the Shell River at the br
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76b29347652aee5fa61125829148fc83
https://doi.org/10.4039/ent90733-12
https://doi.org/10.4039/ent90733-12
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 102:1585-1592
Eighteen sexual mosaics of S. arcticum including 16 distinct gynandromorphs and 2 apparent intersexes are described. These were discovered among 41,615 normal females from Athabasca, Alberta. Male and female terminalia are compared in four specimens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::809d74e78f47bf4ad9c19a789765ad25
https://doi.org/10.4039/ent1021585-12
https://doi.org/10.4039/ent1021585-12
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 94:875-880
Field tests of several formulations of DDT and heptachlor as black-fly larvicides were made in 1953 and 1954 in irrigation canals in Alberta. The objectives of these tests were 1: to investigate further the relationship between larvicide effectivenes
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::607d9c64b0cec21819fa701bc4806935
https://doi.org/10.4039/ent94875-8
https://doi.org/10.4039/ent94875-8
Autor:
F. J. H. Fredeen
Publikováno v:
The Canadian Entomologist. 104:945-953
Procedures are outlined for evaluating in aquaria the effects of insecticides against rheophilic species of Trichoptera larvae (Brachycentrus lateralis (Say), Hydropsyche morosa Hagen, and H. recurvata Banks). In general DDT, DDD, and methoxychlor we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64727f201a2f2fef9ea25ba20c735ecb
https://doi.org/10.4039/ent104945-6
https://doi.org/10.4039/ent104945-6
Publikováno v:
The Canadian Entomologist. 83:73-76
Investigations begun in 1947 in Saskatchewan have provided new data on the life-history and habits of the black fly Simulium arcticum Mall. The only published account of the biology and egg-laying habits of this species is that by Cameron (1922). He
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2013d5d1c2f97f7a5f1213ef55829197
https://doi.org/10.4039/ent8373-3
https://doi.org/10.4039/ent8373-3
Publikováno v:
The Canadian Entomologist. 85:269-272
Bugher and Taylor (1949) and Hassett and Jenkins (1949) reared highly radio-active adults of Aedes aegypti (L.) from larvae kept in a solution of radioactive phosphorus. Jenkins and Hassett (1949) obtained radio-active adults of Aedes pullatus (Coq.)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d225c67509a6c0c809f2765fe015792
https://doi.org/10.4039/ent85269-7
https://doi.org/10.4039/ent85269-7
Publikováno v:
Journal of the Fisheries Research Board of Canada. 28:105-109
Concentrations of organochlorine pesticide residues in the muscle tissues of fish collected from the Saskatchewan River after a 20-year blackfly larviciding program using DDT ranged from less than 0.01–0.05 ppm of DDT, less than 0.01–0.05 ppm DDD
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2415a78dfd3e57ab88f92062cf3216b
https://doi.org/10.1139/f71-018
https://doi.org/10.1139/f71-018