The impact of early season insecticides on biological control of apple leafcurling midge (<i>Dasineura mali</i>)

Authors

  • P.W. Shaw
  • D.R. Wallis
  • D.J. Rogers

DOI:

https://doi.org/10.30843/nzpp.2003.56.6036

Abstract

The 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

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Published

2003-08-01

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 (&lt;i&gt;Dasineura mali&lt;/i&Gt;)”. New Zealand Plant Protection 56 (August 1, 2003): 164–167. Accessed September 25, 2022. https://journal.nzpps.org/index.php/nzpp/article/view/6036.

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Section

Papers

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