The Japanese beetle (Popillia japonica) is a pest that feeds on hundreds of fruit tree species, causing considerable damage. In the USA, costs to control the pest exceed $450 million per year. Global regions that climatically support the invasion of the Japanese beetle include central Europe where it is considered a high priority pest. This project is aiming to tackle the spread of the Japanese beetle by exploring the use of the parasitic fly, Istocheta aldrichi, as a classical biological control agent in Switzerland, where it arrived in 2017.
Clematis vitalba is a fast-growing vine that produces vast quantities of seeds and grows intensely as thickets over trees, shrubs and other vegetation. Due to its rapid growth rate and ability to form large clumps, the plant can quickly outcompete native biodiversity and is dangerous to forests which is why Clematis vitalba is classed as one of New Zealand’s most invasive alien plants. Current control methods include mechanical removal and herbicides. However, this project is investigating the potential of biological control using fungi from its native range to help control the weed.
Tree of heaven, Ailanthus altissima, is a deciduous tree native to north-east and central China and Taiwan. It was brought to Europe and North America as an ornamental, but became invasive and is now an invasive species of concern in many countries, including Canada. Once established, tree of heaven is difficult to control, with mechanical and chemical options being limited and expensive. Since 2020, CABI has been working with partners to coordinate options for biological control of tree of heaven in Canada.