title: Feeding behaviour and susceptibility of Myzus persicae (Sulz) and Brevicoryne brassicae (L.) to [14C] phorate in artificial diet.
abstract: The effect of artificial diet on the growth and reproduction of the aphids Myzus persicae (Sulz) and Brevicoryne brassicae (L) was studied. Following the application of [14C] phorate to the diet, the results showed that B. brassicae was more susceptible than M. persicae. In these experiments the dead and live aphids and their honeydew were also analysed. The dead aphids contained more toxic 14C than the live ones with a direct correlation between the amount of insecticide in the diet and the insecticide extracted from the aphids. The total amount of 14C imbided by aphids was calculated but it bore no correlation with the insecticide applied. The amounts of honeydew produced before and after application of the insectide were measured. In both the species the honeydew production was increased as the insecticide was increased from sublethal doses until the toxic range was reached when honeydew production fell gradually. The results obtained from foliar application of the insecticide were compared with those following treatment of the diet. It was found that the aphids were more susceptible to insecticide applied to the diet.
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects / Q000502:physiology*; D002250:Carbon Radioisotopes; D005247:Feeding Behavior / Q000187:drug effects*; D007306:Insecticides / Q000494:pharmacology*; D010702:Phorate / Q000378:metabolism / Q000494:pharmacology*; D013045:Species Specificity
chemical_list: D002250:Carbon Radioisotopes; D007306:Insecticides; D010702:Phorate