Poster Presentation Science Protecting Plant Health 2017

Amblypelta spp management for NSW and SE QLD avocado and macadamia orchards. Can we reduce the spray frequency with better timing? (#156)

Craig Maddox 1 , Chad Simpson 2 , Ian Newton 3 , Ruth Huwer 1 , David Robertson 1 , Alister Janetzki 1 , Ian Purdue 1 , Carly Maddox 1
  1. NSW DPI, Wollongbar, NSW, Australia
  2. Simpson Farms, Childers, QLD, Australia
  3. Department Agriculture and Fisheries and Forestry, Mareeba, QLD, Australia

The fruitspotting species Amblypelta nitida (FSB) and A lutescens (BSB) are the key pest species to manage for macadamia avocado and many other subtropical crops grown on the east coast of Australia. The normal avocado spray schedules to prevent crop loss from these pests are approximately 14 days in far north Queensland, 21 days around Bundaberg, 28 days around the QLD/NSW border and roughly 42 days in the southern regions where only FSB is present.  A prototype lure trap for BSB and a small trap hedge of plants for FSB have been used during the last 3 seasons to compare the incidence of bugs, the timing of adult flight generations, and how it relates to crop damage. Results of the crop loss to these pests in relation to comparative trials of spray timings based on BSB lure/hedge counts as opposed to a strict 21 day calendar spray program in avocado will be presented. Other trials in macadamia and custard apple have shown that FSB flight detection is possible and are being used to adjust the spray timings in NSW. By reducing the FSB/BSB sprays applied is there evidence that other pests species are impacting on the crops?