Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Jean B. Adams"'
Autor:
Margaret E. Drew, Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 41:1205-1212
Extracts of 12 species of aphids differed in their capacities to reduce the viscosity of methyl cellulose (MC) substrates. The activity of these extracts varied from as much as 60% reduction of viscosity in 48 hours, when the species Myzus cerasi Fab
Autor:
Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 40:951-956
The survival of aphids after different periods of exposure to temperatures of −20° F, 0° F, 10° F, 26° F, and 28° F was examined. None of the nine species, Aulacorthum solani (Kltb.), Myzus ornatus Laing, Macrosiphum euphorbiae (Thos.), Myzus
Autor:
Jean B. Adams, Chester V. Wade
Publikováno v:
Canadian Journal of Zoology. 48:965-968
Freshly extracted salivary glands from 18 species of aphids from leaf, bark, and root tissues of their respective host plants were examined without histological fixation. The typical glands were composed of paired principal and secondary lobes, conne
Autor:
Margaret E. Drew, Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 47:423-426
Aphid populations on oats (Fundy and Stormont) and barley (Charlottetown 80) were studied in the field and yields of these grains examined under the different levels of aphid infestation resulting from applications of malathion and 2,4-D amine to the
Autor:
Jean B. Adams, Margaret E. Drew
Publikováno v:
Canadian Journal of Zoology. 42:741-744
The development of three grain-infesting aphids, Rhopalosiphum padi (L.), Macrosiphum avenae (Fab.), and Rhopalosiphum maidis (Fitch), was studied on four members of the Gramineae: Avena, Triticum, Hordeum, and Poa, in the greenhouse. Wingless R. pad
Autor:
Jean B. Adams, Margaret E. Drew
Publikováno v:
Canadian Journal of Zoology. 43:489-496
Fifty-eight species of aphids from a wide range of host plants, one leafhopper species from Vitis sp., and a psyllid from Alnus rugosa have been examined for their salivary ability to hydrolyse carboxymethyl cellulose (CMC) substrates. Most of these
Autor:
Margaret E. Drew, Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 43:789-794
From similar initial populations, aphid infestations became higher in herbicide-treated areas of oats than in similar untreated areas. Fewer coccinellids were present in these treated areas. The inclusion of an aphicide with the herbicide application
Autor:
Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 38:285-288
When coccinellid larvae in six different age groups were sprayed with 2,4-D amine and then confined in glass vials, two main effects were seen: first, mortality was increased four times in all age groups; and secondly, the mean time to pupation incre
Autor:
Jean B. Adams
Publikováno v:
Canadian Journal of Zoology. 45:588-590