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List of works by Helmuth G. Zimmermann

100 years of biological control of invasive alien plants in South Africa: History, practice and achievements

scientific article published in 2013

A proposed national strategic framework for the management of Cactaceae in South Africa

article

Biological Control of Invasive Alien Plants in South Africa: Necessity, Circumspection, and Success

article

Exceptional biological control of two varieties of Cylindropuntia fulgida (Cactaceae) in South Africa using a recently-identified different biotype of the cochineal insect, Dactylopius tomentosus (Dactylopiidae)

scientific article published on 29 May 2020

Global Actions for Managing Cactus Invasions ⬇️

scientific article published on 16 October 2019

More than a Century of Biological Control Against Invasive Alien Plants in South Africa: A Synoptic View of What Has Been Accomplished

scientific article published in 2020

Prosopis species (Leguminosae)

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