Results 161 to 170 of about 2,493 (202)
Some of the next articles are maybe not open access.
Toxicity of Abamectin to Cockroaches (Dictyoptera: Blattellidae, Blattidae)
Journal of Economic Entomology, 1991Abamectin was fed to German cockroaches, Blattella germanica (L.), in non-choice tests. LT50s and LC50s were estimated by probit analysis. The LT50s for the German cockroach ranged from 4.4 to 1.7 d for males, from 9.0 to 2.4 d for females, and from 4.4 to 1.6 d for nymphs for bait concentrations of abamectin between 0.0025 and 0.0500%.
P G, Koehler +2 more
openaire +2 more sources
Trail-Following Behavior in the German Cockroach (Dictyoptera: Blattellidae)
Journal of Economic Entomology, 2000The trail-following behavior of the German cockroach, Blattella germanica (L.), was evaluated by comparing the distance between cockroach movement paths and preapplied "trails" of fecal extract. For each cockroach group tested (adult males, females, gravid females, and late instars), the mean perpendicular distance of the cockroach from the trail was ...
D M, Miller, P G, Koehler
openaire +2 more sources
Measuring Cypermethrin Resistance in the German Cockroach (Orthoptera: Blattellidae)
Journal of Economic Entomology, 1992Cypermethrin resistance in the German cockroach, Blattella germanica (L.), was assessed by tests of surface contact and topical application. Topical application provided the most sensitive measure of resistance in a field strain. The resistance ratio (RR) measured by topical application was 122.6 for cypermethrin at LD50. As measured by surface contact,
J, Zhai, W H, Robinson
openaire +2 more sources
Secondary Transmission of Toxic Baits in German Cockroach (Dictyoptera: Blattellidae)
Journal of Economic Entomology, 2000The death rates of three toxic gel baits (fipronil bait, 0.05%; hydramethylnon, bait 2.15%; and abamectin B1 bait, 0.05%) were estimated in Blattella germanica (L.). After ingestion, all three baits killed similar proportions of cockroaches, but they died more rapidly after ingestion of fipronil bait than after ingestion of abamectin B1 bait or of ...
Durier, Virginie, Rivault, Colette
openaire +4 more sources
Aspergillosis in German cockroach Blattella germanica (L.) (Blattoidea: Blattellidae)
Mycopathologia, 1997Natural infection of Aspergillus flavus was observed in adults of Blattella germanica. Though the adult insects exhibited no external symptoms, they became hypoactive and later died. The dead and experimentally infected insects repeatedly yielded Aspergillus flavus in culture on Czapek's medium. Direct microscopic observation of the tissues of infected
V, Kulshrestha, S C, Pathak
openaire +2 more sources
German Cockroach (Orthoptera: Blattellidae) Infestations in Low-income Apartments
Journal of Economic Entomology, 1987Interiors of 1,022 low-income apartments in north-central Florida were sampled with sticky traps to determine severity of infestations of German cockroach, Blattella germanica (L.). Median catches were 28.3 cockroaches per trap per night ( x _bar, 42.3); 9.4% of apartments had catches of > 100 cockroaches per trap per night.
P G, Koehler +2 more
openaire +2 more sources
Hydramethylnon Uptake by Blattella germanica (Orthoptera: Blattellidae) by Coprophagy
Journal of Economic Entomology, 1991Blattella germanica (L.) that were fed hydramethylnon bait produced residues that were toxic to exposed conspecifics. Insecticidal activity was traced to the feces of treated insects by feeding radiolabeled material, where approximately 50% of the recovered radioactivity was unmetabolized parent compound.
J, Silverman, G I, Vitale, T J, Shapas
openaire +2 more sources
Environmental Entomology, 2015
The Asian cockroach, Blattella asahinai Mizukubo, first introduced to Florida in 1986, has been spreading throughout the southeastern United States. Populations can reach extremely high densities and cause damage to crops as well as become a nuisance in residential settings.
Yvonne K, Matos, Coby, Schal
openaire +2 more sources
The Asian cockroach, Blattella asahinai Mizukubo, first introduced to Florida in 1986, has been spreading throughout the southeastern United States. Populations can reach extremely high densities and cause damage to crops as well as become a nuisance in residential settings.
Yvonne K, Matos, Coby, Schal
openaire +2 more sources
Diet quality affects bait performance in German cockroaches (Dictyoptera: Blattellidae)
Pest Management Science, 2016AbstractBACKGROUNDBait formulations are widely used to control German cockroach (Blattella germanica) populations. To perform optimally, these formulations must compete favorably with nonâtoxic alternative foods present within the insect's habitat. We hypothesized that the nutritional history of cockroaches and their acceptance or avoidance of glucose ...
Alexander E, Ko +2 more
openaire +2 more sources