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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Test of semiochemicals and a resistant wheat variety for Russian wheat aphid management in South Africa
Journal of Applied Entomology, Volume 131, No. 9-10, Year 2007
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Description
Aphid behaviour-modifying semiochemicals were tested against Russian wheat aphid Diuraphis noxia in South African wheat. Volatile substances from plant essential oils, methyl salicylate, 1,8-cineole and menthol were tested in the laboratory and field in combination with the D. noxia-susceptible wheat variety Betta and the resistant variety Elands. All three substances were repellent to D. noxia in olfactometric tests. Diuraphis noxia settled less on Elands plants that had been exposed to the volatiles, whereas the effect of the volatiles on D. noxia settling on Betta was less obvious. A slow-release pellet formulation was used to apply semiochemicals in wheat in replicated plot field trials in 2004 and 2005. In 2004, semiochemicals reduced aphid populations in Elands, but led to increased aphid populations in Betta. Further, the impact of the chemicals on aphid numbers and grain quality (thousand grain weight) varied according to plant variety, indicating an interaction between semiochemicals and plant resistance/variety. © 2007 The Authors.
Authors & Co-Authors
Prinsloo, Goddy J.
South Africa, Bethlehem
Arc-small Grain Institute
Ninkovic, V.
Sweden, Uppsala
Sveriges Lantbruksuniversitet
van der Linde, Theuns Cde K.
South Africa, Bloemfontein
University of the Free State
van der Westhuizen, Aimie J.
South Africa, Bloemfontein
University of the Free State
Pettersson, Jan
Sweden, Uppsala
Sveriges Lantbruksuniversitet
Glinwood, Robert T.
Sweden, Uppsala
Sveriges Lantbruksuniversitet
Statistics
Citations: 23
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1111/j.1439-0418.2007.01213.x
ISSN:
09312048
e-ISSN:
14390418
Study Locations
South Africa