Invasive species have become an increasingly big threat to indigenous ones as the spread of alien animals and plants has accelerated with the growth of global trade. Some can be very destructive, while some live in close proximity without posing any sort of threat.
Understanding the behaviour of invasive species can provide clues on how to manage them, particularly in situations in which they threaten to wipe out indigenous species.
The CABI journal CAB Reviews has just published its 1000th paper, with a study examining how smallholder farmers can manage the devastating crop pest fall armyworm (FAW, Spodoptera frugiperda). The rapid spread of the FAW to sub-Saharan Africa and Asia is a major threat to smallholder maize farmers, with an average infestation level of 30% of plants across Africa (see CABI’s Fall Armyworm Portal).
In his article, Allan Hruska of the Food and Agriculture Organization has examined published studies to see which management options are most likely to work for smallholders.
Plant quarantine experts on Pest Risk Analysis (PRA) from four countries in South Asia joined together in Bangladesh last week (4th -5th September) for a workshop led by CABI on the new Pest Risk Analysis (PRA) decision support tool and workflow. The PRA tool workshop, which was made possible through CABI’s Action on Invasives programme, took place over two days in Dhaka, Bangladesh. The regional event, coordinated by Dr Malvika Chaudhary (Asia Regional Coordinator) with kind support from Ganeshamoorthy Rajendran (Country Coordinator, South Asia) brought together and welcomed participants from India, Sri Lanka, Nepal and Bangladesh, as well as delegates from FAO and SAARC, Bangladesh.
Invasions from alien plants, animals, and pathogens threaten the economies of the world’s poorest nations, according to study.
One-sixth of the global land surface is highly vulnerable to invasion, including substantial areas in developing countries and biodiversity hotspots, according to the study published in Nature Communications.
By Dr Colin Lawton, National University of Ireland Galway
One of the greatest threats to biodiversity is the invasion of alien species into an ecosystem. These can occur through natural migrations as a result of recent habitat or climate change, or species can be introduced by human activities, both accidentally or deliberately. Invasions are occurring at an increasing rate as a result of faster environmental change and increased movement by human populations.
As one of its key priorities, CABI under the Action on Invasives programme aims to raise awareness about the threat of invasive species with the relevant government departments in Pakistan. In particular to address the issue of the highly invasive Parthenium weed. Through public awareness campaigns and sharing invasive management advice for better control practices, CABI wants to ensure communities are aware of this aggressive weed and its effects on agriculture and health.
The global banana industry is facing a new major threat. On the 8th August, the Colombian Agricultural Institute announced that it has confirmed the presence of a strain of Fusarium oxysporum f.sp. cubense, known as Tropical Race 4 (TR4) in the northern region of the country. Since then the Colombian government has issued a national state of emergency, destroying crops and quarantining plantations in an attempt to postpone the spread of the fungus until a suitable preventative plan can be implemented.