Argentine stem weevil: farmer awareness and the effectiveness of different ryegrass/endophyte associations

Authors

  • A.J. Popay
  • K. Rijswijk
  • S.L. Goldson

DOI:

https://doi.org/10.33584/jnzg.2017.79.570

Abstract

Abstract Argentine stem weevil (ASW) is a highly destructive pest of ryegrass that has recently been associated with increased incidences of field damage. A survey of farmer awareness and management practices in relation to this pest was carried out. Many (47%) farmers sowed favoured plant hosts such as short-term and tetraploid ryegrasses. A field trial, undertaken near Hamilton, compared the effects on ASW larval damage of 10 different ryegrass/endophyte associations in comparison with an endophyte-free control with and without seed treatment. U2 endophyte in a diploid perennial festulolium and AR37 endophyte in a hybrid tetraploid, an Italian diploid and a tetraploid perennial ryegrass had significantly less damage (<26%) than all other treatments (>42%). NEA2 endophyte in a diploid perennial ryegrass and AR1 endophyte in short-term ryegrasses failed to protect plants from severe damage by this pest. Farmers need to be aware of the risks of ASW damage to short-term and tetraploid ryegrasses. Keywords: ploidy, short-term ryegrasses, larval damage, endophyte strains, pasture management

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Published

2017-01-01

How to Cite

Popay, A., Rijswijk, K., & Goldson, S. (2017). Argentine stem weevil: farmer awareness and the effectiveness of different ryegrass/endophyte associations. Journal of New Zealand Grasslands, 79, 153–158. https://doi.org/10.33584/jnzg.2017.79.570

Issue

Volume 79, 2017, Whanganui

Section

Past volumes

License

Copyright

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