David E. Heft, William E. Walton
The abundance and species composition of adult mosquitoes collected by carbon dioxide-baited suction traps and gravid traps in western Los Angeles County, CA, were compared before and during a strong...
Two 6-wk trials were conducted in 28-m2 earthen ponds to compare the efficacy of the arroyo chub, Gila orcutti, to the mosquitofish, Gambusia affinis, as a biological control agent for mosquitoes and...
William E. Walton, Margaret C. Wirth, Parker D. Workman
Survival of the threespine stickleback, Gasterosteus aculeatus, differed among marshes in a demonstration 9.9-ha multipurpose constructed treatment wetland designed to improve the quality of...
George W. Peck, William E. Walton
Growth characteristics and whole body carbon (C), nitrogen (N), and phosphorus (P) concentrations were examined for the southern house mosquito, Culex quinquefasciatus Say, and Culex tarsalis...
Michelle R. Sanford, Karrie Chan, William E. Walton
Ammonium nitrogen (NH4-N) is a significant component of municipal and agricultural wastewaters, and nitrogen reduction is an important use of constructed treatment wetlands. The effects of ammonium...
George W. Peck, William E. Walton
We examined how mosquito life history parameters and whole body carbon (C), nitrogen (N), and phosphorus (P) content responded to changing C, N, and P content in food. The southern house mosquito,...
Synergy between Toxins of Bacillus thuringiensis subsp. israelensis and Bacillus sphaericus (2004)
Margaret C. Wirth, Joshua A. Jiannino, Brian A. Federici, William E. Walton
Synergistic interactions among the multiple endotoxins of Bacillus thuringiensis subsp. israelensis de Barjac play an important role in its high toxicity to mosquito larvae and the absence of...
Margaret C. Wirth, Armelle Delécluse, William E. Walton
The bacteria Bacillus thuringiensis subsp. israelensis and Bacillus sphaericus produce insecticidal toxins used to control mosquito larvae throughout the world. Unfortunately, there are few...
Margaret C. Wirth, William E. Walton, Brian A. Federici
The 2362 strain of Bacillus sphaericus, which produces a binary toxin highly active against Culex mosquitoes, has been developed recently as a commercial larvicide. It is being used currently in...
Report (M.S.)--Michigan Technological University, 1979.
Some groups applicable to problems in physics / (1961)
Thesis (M.S. in Mathematics)--Louisiana Polytechnic Institute, January 1961.
Wirth, Margaret C., Federici, Brian A., Walton, William E.
Bacillus sphaericus is a mosquitocidal bacterium recently developed as a commercial larvicide that is used worldwide to control pestiferous and vector mosquitoes. Whereas B. sphaericus is highly...
Wirth, Margaret C., Delécluse, Armelle, Walton, William E.
Culex quinquefasciatus mosquitoes with high levels of resistance to single or multiple toxins from Bacillus thuringiensis subsp. israelensis were tested for cross-resistance to the Bacillus...
Wirth, Margaret C., Delécluse, Armelle, Walton, William E.
The interaction of two cytolytic toxins, Cyt1Ab from Bacillus thuringiensis subsp. medellin and Cyt2Ba from Bacillus thuringiensis subsp. israelensis, with Bacillus sphaericus was evaluated against...
Wirth, Margaret C., Delécluse, Armelle, Federici, Brian A., Walton, William E.
A novel mosquitocidal bacterium, Bacillus thuringiensis subsp. jegathesan, and one of its toxins, Cry11B, in a recombinant B. thuringiensis strain were evaluated for cross-resistance with strains of...
Rapid evolution of a life history trait
Hairston, Nelson G., Walton, William E.
The copepod Diaptomus sanguineus begins diapause in permanent ponds in late March as an adaptation to avoid summer fish predation. During a study of copepod populations in two Rhode Island ponds, a...
Wirth, Margaret C., Park, Hyun-Woo, Walton, William E., Federici, Brian A.
Insecticides based on Bacillus thuringiensis subsp. israelensis have been used for mosquito and blackfly control for more than 20 years, yet no resistance to this bacterium has been reported....
Wirth, Margaret C., Federici, Brian A., Walton, William E.
Bacillus sphaericus is a mosquitocidal bacterium recently developed as a commercial larvicide that is used worldwide to control pestiferous and vector mosquitoes. Whereas B. sphaericus is highly...
Wirth, Margaret C., Delécluse, Armelle, Walton, William E.
Culex quinquefasciatus mosquitoes with high levels of resistance to single or multiple toxins from Bacillus thuringiensis subsp. israelensis were tested for cross-resistance to the Bacillus...
Wirth, Margaret C., Delécluse, Armelle, Walton, William E.
The interaction of two cytolytic toxins, Cyt1Ab from Bacillus thuringiensis subsp. medellin and Cyt2Ba from Bacillus thuringiensis subsp. israelensis, with Bacillus sphaericus was evaluated against...
Wirth, Margaret C., Delécluse, Armelle, Federici, Brian A., Walton, William E.
A novel mosquitocidal bacterium, Bacillus thuringiensis subsp. jegathesan, and one of its toxins, Cry11B, in a recombinant B. thuringiensis strain were evaluated for cross-resistance with strains of...
Rapid evolution of a life history trait
Hairston, Nelson G., Walton, William E.
The copepod Diaptomus sanguineus begins diapause in permanent ponds in late March as an adaptation to avoid summer fish predation. During a study of copepod populations in two Rhode Island ponds, a...
Wirth, Margaret C., Park, Hyun-Woo, Walton, William E., Federici, Brian A.
Insecticides based on Bacillus thuringiensis subsp. israelensis have been used for mosquito and blackfly control for more than 20 years, yet no resistance to this bacterium has been reported....
Wirth, Margaret C., Yang, Yangkun, Walton, William E., Federici, Brian A., Berry, Colin
Two mosquitocidal toxins (Mtx) of Bacillus sphaericus, which are produced during vegetative growth, were investigated for their potential to increase toxicity and reduce the expression of insecticide...