Guest writer, Dr Jenna Ross, from Crop Health and Protection (CHAP), joins us for the second of her two-part special series (read part 1) on the outputs of her prestigious Nuffield Farming Scholarship. Jenna spent 26 weeks travelling the world studying all aspects of slug invasions and slug control, and in this article discuss the impact of slug invasions on UK biosecurity.
The majestic, unusual looking Lionfish could be seen as harmless to the untrained eye. Yet, this invasive species has multiplied aggressively over the last two decades to become a serious threat to biodiversity in the marine setting.
The red lionfish (Pterois volitans) and the devil firefish (Pterois miles) are native to the Pacific Ocean and the Indian Ocean respectively, though their ranges overlap in the waters around Indonesia. These two species are collectively known as lionfish and are so similar in appearance that scientists usually rely on genetic analysis to tell them apart. Thriving on coral reefs and among mangroves and seagrass, lionfish have distinctive white and red/brown striped bodies and venomous spines on their fins to protect them from predators.
Guest writer, Dr Jenna Ross, from Crop Health and Protection (CHAP), joins us for a two-part special series (read part 2) on the outputs of her prestigious Nuffield Farming Scholarship, where she spent 26 weeks travelling the world studying all aspects of slug invasions and methods of control. In Part 1, Jenna discusses the current slug fauna of the UK and potential slug invasions.
The slug fauna of the UK is constantly evolving. To date, there are an estimated 42 slug species in the UK, with another newly introduced milacid species identified in 2018. However, what is particularly interesting, is that of the species present in the UK, only 18 are native, with the rest being introduced. This means that over 50% of the UK’s slug fauna are exotic. So why are slugs so successful at invading new habitats? There are many reasons for this, including their high reproductive rates, environmental tolerance, flexible behaviour, ability to thrive in association with humans (synanthropic) and the fact they are free from their natural predators and parasites when entering new unoccupied ecological niches.
Woody plant species have been deliberately introduced into many arid and semi-arid regions across the world as they can help combat desertification and provide resources – like fuelwood – to the rural poor. But some of these alien trees and shrubs have become invasive, having devastating effects on other species as well as people.
This is big problem in the mainly arid Baringo County, in Kenya’s Rift valley as well as other counties north, east and south of the country.
A team of international scientists are collaborating to fight the noxious weed yellow toadflax (Linaria vulgaris) in Montana’s world-famous Rocky Mountains with the help of a tiny insect – the shoot-galling weevil Rhinusa pilosa.
Yellow toadflax, first introduced from Wales in the late 1600s as an ornamental and medicinal plant and to make textile dyes, is an aggressive invader listed as a noxious weed in more than 10 US states (including North and South Dakota, Colorado, Nevada, New Mexico, Oregon and Idaho) – which suppresses desirable vegetation through intense competition for limited soil moisture.
Since 2017, CABI and partners have launched a series of extension campaigns in Kenya and Uganda in the fight against the invasive pest fall armyworm. These campaigns used integrated ICT-enabled approaches combining radio, SMS, and community video screenings with the aim of improving awareness, knowledge and management practices for fall armyworm.
Although smallholder agriculture is the main contributor to agricultural production in Africa and vital to food and nutritional security, agricultural productivity generally remains low.
The weevils arrived safely into their new home in Pakistan with “virtually no mortality” according to Dr Weyl. The insects have been put onto parthenium plants to start CABI’s own colony for host specificity testing of important plants in Pakistan.