The Testing and Evaluation Department of the US Navy Entomology Center of Excellence (NECE), Naval Air Station, Jacksonville, Florida, is dedicated to the evaluation of novel equipment and vector control techniques to provide guidance on effective protection measures against human pathogens transmitted by blood-feeding arthropods. Personal protective measures (PPM), to include repellents, are p...

The study of bay leaf extract had been done to know its potential as Culex quinquefasciatus repellent. Bay has the secondary metabolite compounds, such terpenoid that is known repellent mosquitoes. aim this was determine effect on quinquefasciatus. method used in an experiment with complete randomized design which consisted six treatments and four repetitions. treatment control (0%), P1 (10%), ...

The effect of insect vectors on avian exposure to infection by pathogens remains poorly studied. Here, we used an insect repellent treatment to reduce the number of blood-sucking flying insects in blue tit Cyanistes caeruleus nests and examined its effect on nestling health status measured as body mass, nestling phytohaemagglutinin (PHA) response and blood parasite prevalence. We found that (i)...

this study was carried out to determine some mechanical properties of barley seed including deformation, rapture force, rapture energy and toughness as a function of moisture content (10.5%, 12.5%, 14.5% , 16.5%, db), loading rate (5, 15, 25, 35 mm.min-1) and grain size (small, medium, large). tests were performed at 7 replications by the means of a factorial base plot experiment. the results s...

repellet effect of extracts and essential oils of citrus limon (l.) burm.f., (lemon) and melissa officinalis, (balm) were evaluated against anopheles stephensi in laboratory on animal and human and compared with synthetic repellent, n,ndiethyl- 3-methylbenzamide (deet) as a standard. results of statistical analysis revealed significant differences between oils and extracts (p< 0.05) against the...

In order to produce effective advisory messages, knowledge coming from different research fields has to be reconciled. Domain knowledge is only part of what is needed: sociological theories of behaviour change are of great help, and, as the messages have to be conveyed with some wording, argumentation theories are definitely crucial. The issue of integrating diverse knowledge representations is...

Commissural axons cross the nervous system midline and then turn to grow alongside it, neither recrossing nor projecting back into ventral regions. In Drosophila, the midline repellent Slit prevents recrossing: axons cross once because they are initially unresponsive to Slit, becoming responsive only upon crossing. We show that commissural axons in mammals similarly acquire responsiveness to a ...

Sir, Picaridin, a piperidine derivate, is a promising insect repellent that has been available to the consumer since 1998 (1). Picaridin protects against arthropods in a similar fashion to diethyl toluamide (deet), which is considered the gold standard compound (2, 3). Picaridin is also better tolerated than deet (1, 4), a fact that has encouraged its use in repellent formulations. We describe ...

The behavioral responses ofthree colonized strains of Culex quinquefasciatus, two from recent field collections in Thailand (Nonthaburi and Mae Sot) and one from a long-established colony from the National Institute of Health (NIH), Ministry of Public Health, Thailand, were compared during and after exposure to deltamethrin (0.02 g/m2), propoxur (0.2 g/m2), and fenitrothion (0.2 g/m2) using an ...

DEET (N,N-diethyl-3-methylbenzamide) is nowadays the most effective mosquito repellent available, however, its use can present some topical and systemic side effects. Some botanical compositions, as Andiroba (Carapa guianensis), have been proved repellent properties at low cost and toxicity. An experimental study was driven involving four volunteers submitting their forearms covered with Andiro...