The impact of early season insecticides on biological control of apple leafcurling midge (<i>Dasineura mali</i>)
AbstractThe fate of apple leafcurling midge (ALCM Dasineura mali) egg batches was monitored in spring 2003 at two apple orchards in Riwaka near Motueka Orchard A had received prebloom insecticide applications of chlorpyrifos and carbaryl for fruit thinning each season since 2000 Orchard B substituted these chemicals with the selective insecticide buprofezin and used benzyladenine for fruit thinning over the same period Predation and parasitism of ALCM eggs at orchard B resulted in lower survival of larvae and less damage to shoots compared to orchard A Ninety percent of ALCM larvae at orchard B were parasitised by Platygaster demades compared with only 3 at orchard A Heavy infestation of shoots by second generation midge larvae at orchard A resulted in premature termination of 69 of growing shoot tips These results suggest that nonselective early season insecticides used in pipfruit spray programmes may disrupt biological control of ALCM
How to Cite
Shaw, P.W., D.R. Wallis, and D.J. Rogers. “The Impact of Early Season Insecticides on Biological Control of Apple Leafcurling Midge (<i>Dasineura mali</i≫)”. New Zealand Plant Protection 56 (August 1, 2003): 164–167. Accessed June 5, 2023. https://journal.nzpps.org/index.php/nzpp/article/view/6036.