CABI scientists have helped map the ferocious speed and probable cause of a devastating spread of the invasive alien tree Prosopis juliflora (Swartz DC) across an area equivalent to half of neighbouring Djibouti in the Afar Region of north eastern Ethiopia.
Dr Pablo González-Moreno, one of CABI’s senior researchers with expertise in invasive plant ecology, has joined a workshop of international scientists concerned with investigating the invasive non-native species that pose the greatest threat to Gibraltar’s terrestrial and marine environments.
Used as an effective method of controlling invasive species, biological control (or biocontrol) is the term given to the use of living organisms for controlling pests and invasive species. It can provide an effective, environmentally-friendly and cost-efficient way of controlling pest populations, helping to restore crop yields and farmer’s profits. However a recent study, focussing on invasive cassava mealybugs, has shown that biocontrol can also have some surprising knock-on effects.
Eight oriental fruit flies (Bactrocera dorsalis), considered the world’s worst invasive fruit fly, have been found at two monitoring stations in Italy. Annually, there are several reports of this species being found in infested fruit in France, Switzerland and the UK, and one individual was found in a trap in an Austrian fruit market in 2016. This current report, however, is the first time this species has been found on agricultural land in Europe.
Dr Seehausen, a research scientist in risk analysis and invasion ecology based at CABI’s Swiss centre in Delémont, said a biological control agent – the parasitoid Ganaspis cf. brasiliensis – could soon be released to manage the invasive pest in Europe.
The start of 2019 brought sad news when George, the last tree snail of his kind (Achatinella apexfulva) died on New Years Day. His death highlights the plight of Hawaiian snails and epitomises the rapid decline of biodiversity on the Hawaiian Islands.