Oil of the physic nut, Jatropha curcas L. (Malpighiales: Euphorbiaceae), was evaluated in the laboratory for its barrier and repellent activity against the Philippine milk termite Coptotermes vastator Light (Isoptera: Rhinotermitidae). The study showed that J. curcas oil had anti-feeding effect, induced reduction in tunneling activity and increased mortality in C. vastator. Behavior of termites...

Whether they are being taken as dietary supplements by the general public or being evaluated in a clinical study, the authenticity of botanical products is a matter of paramount concern. Botanical specimens and the dietary supplements derived from them can vary in quality and in chemical constituent profiles because of a number of factors. Subtle variations in botanical specimens are known to h...

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...

The diversity of arthropod pests has required the combined use various control methods. application essential oilsshowing insecticidal, repellent or phage-inhibiting activity, together with release natural enemies, can improve integrated pest managementprovided oils display selectivity. aim this study was to evaluate selectivity rosemary pepper [Lippia origanoidesKunth (Verbenaceae)], citronell...

Stimulation of Halobacterium halobium through its sensory photosystems, PS 370 and PS 565, leads either to a prolonged or to a shortened interval between two reversals of the swimming direction of the cell, the attractant or repellent response. Stimuli are integrated to yield the same response regardless through which photosystem they are given. Simultaneously elicited attractant and repellent ...

This report explores the possibilities of using repellent pheromones in order to achieve efficient dispersion of a swarm of robots. The goal is to have a set of autonomous robots cover an unknown environment by collectively visiting each area once. Unlike previous research in collective exploration this report aims at achieving intelligent dispersion by relying solely on local perception of rep...

The release of arsenic from wood pressure-treated with chromated copper arsenate (CCA) can be decreased by application of wood finishes, but little is known about the types of finishes that are best suited for this purpose. This study evaluated the effects of finish water repellent content and ultraviolet (UV) radiation on the release of arsenic, copper, and chromium from CCA-treated wood expos...