Pest Management Science (2020) 76, 4150-4158

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Sarah Mansfield, Michael J. Wilson, Philippa J. Gerard, Derrick J. Wilson, Jayanthi Swaminathan, David A. Wright, Chikako van Koten and Mark R.H. Hurst (2020)
Potential for a biopesticide bait to control black beetle, Heteronychus arator (Coleoptera: Scarabaeidae)
Pest Management Science 76 (12), 4150-4158
Abstract:
BACKGROUND
Yersinia entomophaga is an entomopathogenic bacterium that is active against scarab beetles, among other insects. In New Zealand, the African black beetle, Heteronychus arator (Coleoptera: Scarabaeidae), is a major pest of pastures and arable crops but very few control options exist and no insecticides are registered for use in established pastures.
RESULTS
In laboratory bioassays, H. arator adults were susceptible to a bait containing Y. entomophaga at low doses. This bait was more effective against H. arator adults during spring than autumn in small-scale field plots (320 mm diameter). A large-scale field trial (40 × 40 m plots) reduced adult numbers substantially: approximately twice as many beetles were captured in pitfall traps from untreated plots compared with plots treated with the Y. entomophaga bait at 70 kg ha-1. This single bait application in spring also reduced subsequent larval populations in summer.
CONCLUSIONS
Heteronychus arator is a difficult pest to manage using chemical insecticides. This biopesticide with Y. entomophaga as the active ingredient offers a new solution for New Zealand pastures, with potential for application to other crops affected by H. arator and for control of other pests.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Sarah Mansfield, Michael J. Wilson, Philippa J. Gerard

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
application technology

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Heteronychus arator Grasses/turf/rangeland New Zealand
Yersinia entomophaga (entomopathogen) Heteronychus arator Grasses/turf/rangeland New Zealand
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