Results 201 to 210 of about 4,143 (244)

Effects of Diflubenzuron on Benthic Macroinvertebrates in Littoral Enclosures

Archives of Environmental Contamination and Toxicology, 1996
Two applications of the insect growth regulator diflubenzuron were made to replicate littoral enclosures at nominal concentrations of 0.7, 2.5, 7.0, and 30 &mgr;g/L. Assessment of the effects of this insecticide on benthic macroinvertebrate community structure was accomplished by measuring changes in abundance and taxonomic richness.
, O'Halloran, , Liber, , Schmude, , Corry   +3 more
openaire   +2 more sources

Accumulation of diflubenzuron in bolti fish Orechromis niloticus

Food / Nahrung, 1991
AbstractOrechromis niloticus fingerlings were exposed to the insect growth inhibitor diflubenzuron 1‐(2, 6‐Difluorobenzoyl)3‐(4‐chlorophenyl)urea for 21 days. Diflubenzuron was introduced to the aquariums where fish were maintained at the beginning of the experiment, then its level in water, gills and liver was detected after 1, 7, 14 and 21 days.
M T, Ahmed, A H, Eid
openaire   +2 more sources

Susceptibility and alterations by diflubenzuron in larvae of Aedes aegypti.

Archives of Insect Biochemistry and Physiology, 2019
Benzoylphenyl ureas inhibit chitin synthesis and interfere with the molting process in arthropods. In this study, the effect of diflubenzuron on third-instar larvae of Aedes aegypti was evaluated. The susceptibility to the product was determined, and the
Abraham Montaño-Reyes, C. Llanderal-Cázares, J. Valdez-Carrasco, K. Miranda-Perkins, H. Sánchez-arroyo   +4 more
semanticscholar   +1 more source

Combination of photoinduced fluorescence and GC-MS for elucidating the photodegradation mechanisms of diflubenzuron and fenuron pesticides.

Luminescence (Chichester, England Print), 2019
Diflubenzuron (DFB) and fenuron (FEN) are benzoylurea and phenylurea pesticides, widely used in Senegal, that do not exhibit any natural fluorescence, but can be determined by means of photoinduced fluorescence (PIF) methods.
P. Diaw, O. Mbaye, D. Thiaré, N. Oturan, M. D. Gaye-Seye, A. Coly, B. Le Jeune, P. Giamarchi, M. Oturan, J. Aaron   +9 more
semanticscholar   +1 more source

Rapid on-site immunoassay for diflubenzuron in grains

Analytica Chimica Acta, 2002
Abstract An antibody-based test for field use has been developed to enable a screening test for diflubenzuron in animal feed grain. In this test, a pesticide containing methanol extract of the grain sample and an HRP-labeled diflubenzuron derivative are separately added to the antibody-precoated 8-well strip.
Shuo Wang, Amanda S. Hill, Ivan R. Kennedy   +2 more
openaire   +1 more source

Diflubenzuron larvicide auto-dissemination: A modeling study

Acta Tropica
Proposing substitutes for Pyriproxyfen (PPF) in the auto-dissemination strategy is essential to ensure the continuity of the strategy in the field, especially in the case of the emergence of populations resistant to this larvicide. One possible substitute among the compounds already in use in Brazil is the larvicide Diflubenzuron (DFB).
Ayrton Sena Gouveia, Cláudia Torres Codeço, Francisco Augusto da Silva Ferreira, José Joaquín Carvajal Cortés, Sergio Luiz Bessa Luz   +4 more
openaire   +2 more sources

Effect of diflubenzuron on nitrogen fixation in soil

Chemosphere, 1988
The effect of 100, 200, 300, 400 and 500 μg diflubenzuron per gram of soil was studied in nonsterile soil incubated under aerobic conditions, and in sterilized soil inoculated with Azotobacter vinelandii. The presence of 100 to 500 μg/g had a stimulatory effect on dinitrogen fixation in both nonsterile and sterile soil.
M.V. Martinez-Toledo, T. de la Rubia, J. Moreno, J. Gonzalez-Lopez   +3 more
openaire   +1 more source

Investigation of locust cuticle using the insecticide diflubenzuron

Journal of Insect Physiology, 1977
Abstract Diflubenzuron inhibits the synthesis of chitin ( Verloop , in prep.). Some of the resulting possibilities for the investigation of cuticle are explored in this paper. The cuticle of locusts treated with DFB is prone to fracture in characteristic ways. This is of relevance in studying the function of the exoskeleton.
openaire   +2 more sources

The effects of diflubenzuron on the growth of insect cuticle

Pesticide Science, 1978
AbstractCuticle consists of chitin microfibrils embedded in a matrix composed largely of hydrated proteins. The effect of diflubenzuron, an inhibitor of chitin synthetase, on the deposition of both these components is reviewed. The polymerisation reaction is but one step in the pathway leading to chitin microfibrils.
openaire   +1 more source

Mode of action and insecticidal properties of diflubenzuron

1987
The insect integument consists of an epidermal cell layer with the overlying cuticle which it has secreted. The two major components of the insect cuticle are protein and chitin. Chitin, a polymer of acetylglucosamine, always appears to occur in association with protein. The ratio of protein to chitin differs in cuticles of different species.
A. C. Grosscurt, B. Jongsma
openaire   +1 more source