oa Journal of the Entomological Society of Southern Africa - Systemic behaviour and toxicity to wheat aphids of methyl-s-demeton after uptake by wheat plants
|Article Title||Systemic behaviour and toxicity to wheat aphids of methyl-s-demeton after uptake by wheat plants|
|© Publisher:||Entomological Society of South Africa (ESSA)|
|Journal||Journal of the Entomological Society of Southern Africa|
|Affiliations||1 Department of Entomology, University of the Orange Free State, Bloemfontein|
|Publication Date||Jan 1973|
|Pages||287 - 292|
|Keyword(s)||Methyl-s-demeton and Schizaphis graminum (Rond.)|
Laboratory-grown wheat plants, infested with wheat aphids, Schizaphis graminum (Rond.), were treated with various concentrations of the systemic insecticide methyl-s-demeton. After exposure to the insecticide, the surviving aphids were counted and a small sample of leaf, taken from the area where aphids had fed, was incubated with a standard fly-head esterase preparation. The data obtained were used to calculate the LI 50 (that percentage inhibition of the standard esterase preparation which corresponded to a 50 percent mortality of the aphids). Translocation and retention time of the insecticide was also investigated.
Article metrics loading...