In this study, the purpose was to improve outdoor performance of cement bonded wood composite due their biodegradation and sensitivity moisture especially in warm humid climates. Cement composites were treated with different concentrations (10 %, 25 50 75 % 100 %) water repellent. Water repellent used an organo-silicon based, nano-sized, eco-friendly, water-based agents. Dipping pressure system...

Botanical monoterpenes are secondary metabolites present in essential oils produced by plants. Some of them are insect repellents. The bloodsucking bug Rhodnius prolixus Ståhl (Hemiptera: Reduviidae) is one of the main vectors of Chagas disease in the north of South America and some countries in Central America. In this study, we studied the repellence produced by two monoterpenes, menthyl acet...

The Asiatic citrus psyllid (Diaphorina citri Kuwayama [Hemiptera: Sternorrhyncha: Psyllidae] is a vector of huanglongbing (citrus greening), a devastating disease of citrus caused by phloem-limited bacteria. Growing guava (Psidium guajava) as an intercrop appears to be a successful means of reducing psyllid numbers within citrus orchards; however, the mechanism by which such a reduction is achi...

Abstract Infrastructure development, especially in the field of construction material technology, one them is mortar. The water content greatly determines energy performance and durability Water can enter building materials or mortar through rain. Damage caused by moisture common, areas with high content. To solve this problems, a hydrophobic water-repellent was created, which using additive, n...

Methyl N,N-dimethyl anthranilate (MDA), ethyl anthranilate (EA) and butyl anthranilate (BA) were previously shown to repel Aedes aegypti mosquitoes from landing on human skin. However, the effect of these compounds on the orientation of flying mosquitoes in a choice situation and their effect on mosquito oviposition are not yet known. Here, we used a modified Y-tube olfactometer to test the eff...

The contamination of soil with petroleum products is a major environmental problem. Petroleum products are common soil contaminants as a result of human activities, and they are causing substantial changes in the biological (particularly microbiological) processes, chemical composition, structure and physical properties of soil. The main objective of this study was to assess the impact of soil ...

The compressive strength of concrete may be affected by seepage salt water. Dead Sea water is a hazardous environment for due to high concentration salts. aim this study was investigate the effect on containing hydrophobic water-repellent admixture, and determine optimum dosage admixture used reduce effect. Three types cement were (Ordinary Portland Cement, Pozzolanic Sulphate-Resisting Cement)...

Pyrethroid insecticides induce an excito-repellent effect that reduces contact between humans and mosquitoes. Insecticide use is expected to lower the risk of pathogen transmission, particularly when impregnated on long-lasting treated bednets. When applied at low doses, pyrethroids have a toxic effect, however the development of pyrethroid resistance in several mosquito species may jeopardize ...

How to cite this article: Venter, G.J., Labuschagne, K., Boikanyo, S.N.B. & Morey, L., 2014, ‘Assessment of the repellent effect of citronella and lemon eucalyptus oil against South African Culicoides species’, Journal of the South African Veterinary Association 85(1), Art. #992, 5 pages. http://dx.doi. org/10.4102/jsava.v85i1.992 The use of insect repellents to reduce the attack rate of Culico...

The motile zoospores of the damping-off pathogen Aphanomyces cochlioides aggregate on host plants (e.g., sugar beet, spinach) guided by the host-specific plant signal cochliophilin A before infection. To assess the potential role of secondary metabolites in nonhost resistance, acetone extracts of 200 nonhost traditional medicinal plants from Chinese and Bangladeshi origins were tested for the m...