About the Authors
- Mike H. Allsopp
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Affiliation Plant Protection Research Institute, Agricultural Research Council, Pretoria, South Africa
- Willem J. de Lange
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Affiliation Environmental and Resource Economics Group, Council for Scientific and Industrial Research, Stellenbosch, South Africa
- Ruan Veldtman
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* E-mail: Veldtman@sanbi.org
Affiliation South African National Biodiversity Institute, Kirstenbosch Research Centre, Cape Town, South Africa
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Wrote the paper: MHA WJDL RV. Conceived the paper: MHA WJdL RV. Performed calculations: MHA WJdL RV. Performed literature search: MHA.