Does travel stress strengthen invasiveness?

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Research has already shown that invasive species tend to be more tolerant to environmental stress than related non-invasive species. However, a recent study published in Biological Invasions, set out to discover whether this stress tolerance was an inherent trait or whether it was something acquired en route from their natural habitat to the new one.

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Himalayan Balsam: Cause or Associate of Soil Erosion?

Himalayan Balsam
Himalayan balsam was introduced as an ornamental plant and has now become a widespread invasive plant (© Stacey Newman)

Himalayan balsam (Impatiens glandulifera) is a non-native annual plant that was introduced into parts of Europe during the mid-nineteenth century as an ornamental plant for parks and gardens.

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March of the Armyworm

By Stephanie Parker. Reblogged from Earth Island Journal.

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Since fall armyworms invaded his maize fields in central Ethiopia last year, Mohamud Abdu has had little success controlling them. He estimates that he lost 50 percent of his crop in 2017. Photo: Stephanie Parker

Mohamud Abdu stands tall in his maize field in Alaba, Ethiopia, a small agricultural district over 200 kilometers south of the country’s capital, Addis Ababa. Smooth green leaves reach up to his waist. The field is off a dirt road where children ride old bicycles and the occasional wooden cart, pulled by donkeys and piled high with people, passes by.

The sea of green where Abdu stands looks lush and healthy at first glance. The maize stalks are planted closely together and the leaves rustle gently in the wind. But upon inspection, these leaves are riddled with holes and plant detritus litter the remainder. Abdu pries open the whorl of a nearby maize plant with his fingers, and takes out a small caterpillar, roughly an inch long. It squirms on his palm.

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A night at the movies: with soybean and fall armyworm as stars of the show

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A similar screening takes place with a community in Uganda

Farmers in northern Ghana are beginning to get a taste of the latest movie out of the Box Office – it’s not a romantic comedy or a thriller – instead it’s a production that will help them get more from their soybean crops and protect their maize from the Fall armyworm caterpillar.

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Minimising further insect pests invasions in Africa

By Esther Ngumbi. Reblogged from SciDev.Net.

Minimising further insect pests invasions in Africa
Copyright: Tamzin Byrne/ICIPE

The US Agency for International Development (USAID) recently offered prize money for the best and digital tools that can be used to help combat the fall armyworm (FAW), an invasive pest that has spread across Africa. The winners will be announced in the coming months.

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Parthenium: Controlling the World’s Most Destructive Toxic Weed

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Parthenium is toxic to animals and humans when consumed in high enough quantities (© CABI)

The poisonous Parthenium hysterophorus plant is one of the world’s most destructive invasive plant species, threatening biodiversity, food security and human health across numerous countries. The herb is native to Central and South America but has spread to over 40 countries over recent decades including Australia, India, Ethiopia, Swaziland and South Africa.

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Invasive Alien Plants

The CABI Blog

By Carol Ellison

It was back in the early 1990s, on my first field trip to Assam in North-east India, with invasion ecologist Dr. Sean T. Murphy, when I first encountered mikania growing as an invasive weed. Until then, I had only seen this vine in its Central and South American native range, where locating a population of the plant could sometimes take all day.

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