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Issue 106, November 2023 articles

  1. Weed Biocontrol in the Cook Islands Shows the Way for Others

    MWLR is assisting eight developing countries in the Pacific to develop biocontrol programmes for their most problematic invasive weeds as part of the Pacific Regional Invasive Species Management Support Service.

  2. The Highs and Lows of Cost–Benefit Analyses

    Since the 1920’s New Zealand has released 69 biocontrol agents against 28 weed species. Notable successes that have been analysed economically include the suppression of pasture weeds such as ragwort (Jacobaeae vulgaris) and St. John’s wort (Hypericum perforatum).

  3. The Economic Benefits of Two Beetles

    Does anyone remember St John’s wort (Hypericum perforatum)? This nasty plant was one of the four worst weeds in New Zealand in the 1930s. St. John’s wort infestations were particularly serious in hill-country grazing land, reducing productivity and poisoning livestock due to a toxin known as hyperic...

  4. Summer Activities

    Summer is a busy time for many biocontrol agents, so you might need to schedule the following activities.