EVALUATING ACEPHATE FOR INSECTICIDE EXCLUSION OF OXYOPS VITIOSA (COLEOPTERA: CURCULIONIDAE) FROM MELALEUCA QUINQUENERVIA
AbstractOne method of evaluating the impact of insect weed biological control agents is to exclude them from their host with insecticides, thereby enabling comparisons of host fitness between infested and non-infested plants. However, the insecticide must not positively or negatively affect the plant being protected. The insecticide acephate was tested for its effects on Oxyops vitiosa Pascoe and Melaleuca quinquenervia (Cav.) S. T. Blake. Saplings of M. quinquenervia were sprayed with concentrations of 0, 0.073, 0.36, and 0.73% a.i. acephate every 7, 14, and 21 days. A bioassay using leaves from sprayed plants and third instars of O. vitiosa found reduced defoliation up to 21 days after treatment at the 0.36 and 0.73% concentrations of acephate. There were minor phytotoxic effects on younger, more tender leaves at the 0.73% concentration of acephate which reduced leaf biomass. Acephate can protect M. quinquenervia foliage from O. vitiosa larvae at the 0.36% concentration and spraying every 14 days will not affect the plant.
View this article in BioOne
Literature Review Articles
Copyright for any article published in Florida Entomologist is held by the author(s) of the article. Florida Entomologist follows terms of theCreative Commons, Attribution Non-Commercial License (cc by-nc). By submitting and publishing articles in Florida Entomologist, authors grant the FOJ and Florida Entomologist's host institutions permission to make the article available through Internet posting and electronic dissemination, and to otherwise archive the information contained both electronically and in a hard printed version. When used, information and images obtained from articles must be referenced and cited appropriately. Articles may be reproduced for personal, educational, or archival purposes, or any non-commercial use. Permission should be sought from the author(s) for multiple, non-commercial reproduction. Written permission from the author(s) is required for any commercial reproduction.