Abstract
Abstract: Imidacloprid technical ingredient was tested in the laboratory to determine ingestion/contact or contact alone toxicity over a 5‐day period to apple maggot flies, Rhagoleta pomonella (Walsh). Formulated imidacloprid was also tested in the field against R. pomonella flies for residual efficacy over a 7‐day period. In the laboratory tests, imidacloprid showed high lethal and sublethal effects. It was 10–12 times more toxic and acted more rapidly by oral ingestion than by surface contact. Affected flies were observed to cease feeding and then regurgitate. Mortality stabilized 4 days after treatment. Compared with control flies, females exposed to imidacloprid showed reduced fecundity regardless of whether exposure was by oral or surface contact. In field experiments, spray applications of imidacloprid to foliage at the manufacturer's recommended rate resulted in no significant mortality of flies, either among flies released immediately after treatment or 24 h later. Imidacloprid residue on tree leaves reduced the reproductive ability of flies released immediately after treatment, but the effect was minimal. The potential use of imidacloprid as a toxicant on pesticide‐treated spheres is discussed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
