Read more about the article Is it possible to predict pest interceptions?
Examples of arthropods detected on imported kiwifruit (Actinidia deliciosa) in South Africa. Anti-clockwise from top: Frankliniella intonsa (Thripidae), Tuckerella japonica (Tuckerellidae), Brevipalpus sp. (Tenuipalpidae) and Oribatida (two species). Figure reproduced from Faulkner et al. 2020, supplied by D. Saccaggi.

Is it possible to predict pest interceptions?

Is there a way to predict which imported agricultural products are most likely to carry a pest? This question was tackled by former C∙I∙B student, Davina Saccaggi, in a recent paper in Ecological Applications.

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Read more about the article Retooling invasion science to deal with rapid global change
Figure 2. The “bridgehead effect” of the global spread of the harlequin ladybird beetle Harmonia axyridis, based on genetic analyses by Lombaert and colleagues (2010; PLoS ONE 5: e9743). The beetle was introduced intentionally as an insect biocontrol agent in some regions (shown in green). From these bridgehead regions, the beetle was transported inadvertently to other continents. Most of the global spread of this species has originated from non-native populations in Eastern North America.

Retooling invasion science to deal with rapid global change

Invasion science must adapt to meet growing societal demands and biosecurity challenges in the face of rapid global environmental change. This task was addressed at a workshop during the NEOBIOTA conference in Dún Laoghaire, Ireland, in September 2018 that was attended by several researchers affiliated with the Centre for Invasion Biology (C∙I∙B).

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Alien pest of wheat and maize could pose a threat to South Africa

Alien pests of agriculture cause billions of Rands’ worth of damage to South African crops every year. Knowledge on which pests could pose a threat in the future is vital to inform South Africa’s biosecurity.

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Read more about the article Unseen arrivals: what is South Africa unknowingly importing?
Biosecurity inspections in South Africa as part of international agricultural trade. Clockwise from top left: microscopic inspections of fruit at Stellenbosch DALRRD laboratories; pre-export inspection of citrus at exporter’s premises; inspection of cut flowers at OR Tambo airport; inspection of bonsai plants at Stellenbosch DALRRD laboratories. Figure reproduced from Davina Saccaggi’s PhD dissertation at Stellenbosch University. Photos by DALRRD.

Unseen arrivals: what is South Africa unknowingly importing?

Global agricultural trade is the single biggest pathway of introduction of alien invertebrates and microorganisms. Each imported grain, fruit, vegetable, plant or flower may be carrying a host of unseen and unwanted passengers – including insects, mites, fungi or viruses.

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Read more about the article Scientists warn of increasing threats posed by invasive alien species
The Polyphagous Shot Hole Borer is an ambrosia beetle that is native to Asia and was first recorded in South Africa in 2017. This beetle and an associated fungus pose substantial threats to both native and alien trees in the country. At least 80 tree species, including 35 native, are known to be attacked. This invasion has already caused huge damage by killing large trees in urban areas. The full extent of impact of this invader on the South African urban environment will only be ascertained over time. Municipalities already face the costly removal of many heavily infested street trees. Photos: Samantha Bush, Trudy Paap

Scientists warn of increasing threats posed by invasive alien species

Invasive alien species are one of the top five threats to biodiversity and ecosystems globally, yet only a handful of countries regard biosecurity measures as a priority.

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