Browsing by Subject "Major entomology"
Now showing items 21-40 of 94
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(Texas A&M University. Libraries, 1980)Courtship behavior of male and female horn flies was observed through use of 16-mm motion picture photography. Patterns of courtship were determined and categorized into elements of courtship. Horn fly courtship patterns ...
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(Texas A&M University. Libraries, 1965)Studies in the laboratory and insectary showed at least two strains of pink bollworm, Pectinophora gossypiella (Sänders) exist north of the equator in the cotton growing areas of the Western Hemisphere, when measured in ...
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(Texas A&M University. Libraries, 1977)The distribution and metabolism of ¹⁴C-1-(6¹-7¹-dimethyl oct-2¹-enyl)4-ethyl phenyl ether (R-20458) and (2,3-³3H)-7-epoxy-1-(p-ethyl-phenoxy)-3-ethyl-7-methylnonane (R0-10-3108) were studied in small colonies of the imported ...
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(Texas A&M University. Libraries, 1971)The ecology and control of the sunflower moth, Homoeosoma electellum (Hulst), was studied at College Station and McGregor, Texas, during 1967-1969. The species exhibited 2 population peaks during the growing season. Larval, ...
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(Texas A&M University. Libraries, 1973)A study was conducted to show the effects of DDT, several other insecticides, and some related environmentally persistent chemicals on growth and photosynthesis in the freshwater algae Chlorella pyrenoidosa Chick. Additional ...
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(Texas A&M University. Libraries, 1972)The effects various environmental and biological parameters have on the activity of juvenile hormone (JH) analogs in the tobacco budworm, Heliothis virescens, ( F.), were studied. Preliminary investigations indicate that ...
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(Texas A&M University. Libraries, 1965)Topical treatments with endrin and Guthion compounds were applied to eggs, larvae and adults of the bollworm, Heliothis zea, and the tobacco budworm, Heliothis virescens. Endrin was much more effective on larvae of both ...
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(Texas A&M University. Libraries, 1987)Separate groups of Culex quinquefasciatus Say, UTMB strain, were exposed for 24 hrs as fourth instar larvae to sublethal concentrations of malathion, methoprene, propoxur and resmethrin. Effects on the insecticide-exposed ...
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(Texas A&M University. Libraries, 1980)Temperature influences development and mortality of the southern pine beetle, Dendroctonus frontalis Zimmermann. Because the insect is difficult to observe and rear, the effects of temperature on development and mortality ...
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(Texas A&M University. Libraries, 1979)A series of experiments was conducted to determine the effect of temperature on development and mortality of the horn fly , Haematobia irritans irritans (L .). Rates of development were determined for 11 constant temperatures ...
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(Texas A&M University. Libraries, 1980)Seventy-seven genotypes of buffelgrass were screened for resistance to the spittlebug complex A. albofasciata (Lallemand) and. P. simulans (Walker) in Apodaca, N. L. Screening involved artificially infesting plants in caged ...
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(Texas A&M University. Libraries, 1990)Studies conducted from 1986 through 1988 on the millet stalk borer (MSB), Haimbachia ignefusalis (Lepidoptera: Pyralidae) included investigations on its host plants, natural enemies, oviposition behavior, effects on crop ...
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(Texas A&M University. Libraries, 1995)Methods for evaluating natural enemies of Diuraphis noxia (Kurdjumov) in multiple habitats were examined during 1991- 1993 at Bushland, Texas. Methods examined included cage exclusion, insecticidal exclusion, and host ...
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(Texas A&M University. Libraries, 1981)Many factors influence the ability of an infestation of the southern pine beetle, Dendroctonus frontalis Zimmermann to enlarge. These factors may relate to the characteristics of the host trees in the stand, the population ...
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(Texas A&M University. Libraries, 1985)When a parasitoid forages for hosts, it must decide (1) where to search for and how to recognize hosts (2) which hosts to parasitize, (3) what sex ratio to produce and (4) how many eggs to lay. Various aspects of these ...
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(Texas A&M University. Libraries, 1970)A single oral dose of Furadan-ring-C¹⁴ to hens at a rate of 2.7 mg/kg resulted in detectable residues in the eggs for 10 days after treatment. Maximum concentrations of Furadan equivalents occurred 4 days after treatment ...
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(Texas A&M University. Libraries, 1980)Ultrathin sections of tissues, organs, and whole bodies of black-faced leafhoppers, Graminella nigrifrons (Forbes), were examined by transmission electron microscopy. Virions were observed adsorbed only to the intima of ...
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(Texas A&M University. Libraries, 1970)Studies were conducted to determine the effect of various biotic and physical factors on the feeding and searching behavior of the larvae of Chrysopa carnea Stephens. The ultimate objective of these studies was to determine ...
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(Texas A&M University. Libraries, 1987)Campoletis sonorensis is an ichneumonid endoparasitoid of Heliothis virescens larvae. The polydnavirus which occurs in the reproductive tract of C. sonorensis (CsV) has several effects on the host independent of the presence ...
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(Texas A&M University. Libraries, 1985)Alternate hosts of Bracon mellitor Say were located in native vegetation in College Station and New Clarkson, TX. Six new hosts, Acontia cretata (Grote & Robinson), Phalonia sp. (A), Phalonia sp. (B), Anthonomus heterothecae ...