H. G. Zimmermann

2.2k total citations
57 papers, 1.6k citations indexed

About

H. G. Zimmermann is a scholar working on Insect Science, Food Science and Plant Science. According to data from OpenAlex, H. G. Zimmermann has authored 57 papers receiving a total of 1.6k indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Insect Science, 31 papers in Food Science and 25 papers in Plant Science. Recurrent topics in H. G. Zimmermann's work include Biological Control of Invasive Species (46 papers), Botanical Research and Applications (30 papers) and Chemical synthesis and alkaloids (10 papers). H. G. Zimmermann is often cited by papers focused on Biological Control of Invasive Species (46 papers), Botanical Research and Applications (30 papers) and Chemical synthesis and alkaloids (10 papers). H. G. Zimmermann collaborates with scholars based in South Africa, Australia and Italy. H. G. Zimmermann's co-authors include V. C. Moran, J. H. Hoffmann, T. Olckers, Hildegard Klein, S. Neser, Richard Hill, Stephanie Bloem, Iain D. Paterson, Robert Spooner‐Hart and Paul Holford and has published in prestigious journals such as Journal of Applied Ecology, Agriculture Ecosystems & Environment and Frontiers in Ecology and the Environment.

In The Last Decade

H. G. Zimmermann

55 papers receiving 1.4k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
H. G. Zimmermann South Africa	25	1.2k	768	440	427	388	57	1.6k
Rachel McFadyen Australia	20	1.5k 1.2×	1.3k 1.8×	360 0.8×	185 0.4×	329 0.8×	67	2.0k
B. A. Auld Australia	22	648 0.6×	1.1k 1.4×	299 0.7×	60 0.1×	305 0.8×	91	1.6k
R. Muniappan United States	20	1.2k 1.1×	1.0k 1.3×	498 1.1×	74 0.2×	154 0.4×	141	1.9k
Iain D. Paterson South Africa	18	688 0.6×	382 0.5×	258 0.6×	138 0.3×	213 0.5×	67	923
S. Neser South Africa	17	644 0.6×	436 0.6×	348 0.8×	61 0.1×	268 0.7×	58	1.0k
C. Zachariades South Africa	15	645 0.6×	529 0.7×	355 0.8×	49 0.1×	332 0.9×	67	1.0k
Vinícius Castro Souza Brazil	19	224 0.2×	508 0.7×	779 1.8×	244 0.6×	236 0.6×	155	1.4k
L. W. Strathie South Africa	14	444 0.4×	419 0.5×	177 0.4×	102 0.2×	208 0.5×	39	875
T. Olckers South Africa	19	1.1k 0.9×	781 1.0×	265 0.6×	23 0.1×	309 0.8×	85	1.3k
Andrew J. McConnachie South Africa	14	437 0.4×	420 0.5×	153 0.3×	83 0.2×	240 0.6×	35	866

Countries citing papers authored by H. G. Zimmermann

Since Specialization

Citations

This map shows the geographic impact of H. G. Zimmermann's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by H. G. Zimmermann with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites H. G. Zimmermann more than expected).

Fields of papers citing papers by H. G. Zimmermann

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by H. G. Zimmermann. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by H. G. Zimmermann. The network helps show where H. G. Zimmermann may publish in the future.

Co-authorship network of co-authors of H. G. Zimmermann

This figure shows the co-authorship network connecting the top 25 collaborators of H. G. Zimmermann. A scholar is included among the top collaborators of H. G. Zimmermann based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with H. G. Zimmermann. H. G. Zimmermann is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Hoffmann, J. H., V. C. Moran, H. G. Zimmermann, & F.A.C. Impson. (2020). Biocontrol of a prickly pear cactus in South Africa: Reinterpreting the analogous, renowned case in Australia. Journal of Applied Ecology. 57(12). 2475–2484. 18 indexed citations

Novoa, Ana, Giuseppe Brundu, Michael Day, et al.. (2019). Global Actions for Managing Cactus Invasions. Plants. 8(10). 421–421. 19 indexed citations

Zimmermann, H. G., et al.. (2010). La amenaza de los piojos harineros Hypogeococus pungens e Hypogeococus festerianus (Hemiptera: Pseudococcidae) a las cactáceas mexicanas y del Caribe. 55(1). 4–17. 3 indexed citations

Holford, Paul, et al.. (2009). Determination of biotypes ofDactylopius tomentosus(Hemiptera: Dactylopiidae) and insights into the taxonomic relationships of their hosts,Cylindropuntiaspp.. Bulletin of Entomological Research. 100(3). 347–358. 15 indexed citations

Holford, Paul, et al.. (2009). Distinguishing suitable biotypes ofDactylopius tomentosus(Hemiptera: Dactylopiidae) for biological control ofCylindropuntia fulgidavar.fulgida(Caryophyllales: Cactaceae) in South Africa. Bulletin of Entomological Research. 99(6). 619–627. 15 indexed citations

Zimmermann, H. G., et al.. (2007). Development of Cactoblastis cactorum (Berg) (Lepidoptera: Pyralidae) on six North American Opuntia species. African Entomology. 15(2). 295–299. 18 indexed citations

Zimmermann, H. G., Stephanie Bloem, & Hildegard Klein. (2004). Biology, history, threat, surveillance and control of the Cactus Moth, Cactoblastis cactorum. 53 indexed citations

Zimmermann, H. G., V. C. Moran, & J. H. Hoffmann. (2004). Biological control in the management of invasive alien plants in South Africa, and the role of the Working for Water programme. South African Journal of Science. 100. 34–40. 79 indexed citations

Hoffmann, J. H., et al.. (2003). Biological control of spear thistle, Cirsium vulgare (Asteraceae), in South Africa: a modest start for Rhinocyllus conicus (Coleoptera: Curculionidae). African Entomology. 11(1). 15–20. 5 indexed citations

10.

Sheppard, A. W., Richard Hill, Rosemarie De Clerck-Floate, et al.. (2003). Review Article A global review of risk-benefit-cost analysis for the introduction of classical biological control agents against weeds: a crisis in the making?. 24(4). 93 indexed citations

11.

Robertson, Mark P., Martin H. Villet, Dean H.K. Fairbanks, et al.. (2003). A proposed prioritization system for the management of invasive alien plants in South Africa. South African Journal of Science. 99. 37–43. 51 indexed citations

12.

Wilgen, Brian W. van, et al.. (2000). Big returns from small organisms: developing a strategy for the biological control of invasive alien plants in South Africa.. South African Journal of Science. 96(3). 148–152. 20 indexed citations

13.

Moran, V. C., J. H. Hoffmann, D. Donnelly, et al.. (2000). Biological control of alien, invasive pine trees (Pinus species) in South Africa.. 941–953. 27 indexed citations

14.

Zimmermann, H. G., et al.. (1999). Host specificity of biotypes of Dactylopius opuntiae (Cockerell) (Hemiptera: Dactylopiidae): prospects for biological control of Opuntia stricta (Haworth) Haworth (Cactaceae) in Africa. African Entomology. 7(1). 43–48. 17 indexed citations

15.

Hoffmann, J. H., et al.. (1999). Host‐plant affinities of two biotypes of Dactylopius opuntiae (Homoptera: Dactylopiidae): enhanced prospects for biological control of Opuntia stricta (Cactaceae) in South Africa. Journal of Applied Ecology. 36(1). 85–91. 50 indexed citations

16.

Zimmermann, H. G.. (1988). The importance and management of wild cherry.. 538–540. 2 indexed citations

17.

Moran, V. C. & H. G. Zimmermann. (1984). The biological control of cactus weeds: achievements and prospects.. 5(4). 297–320. 58 indexed citations

18.

Zimmermann, H. G. & V. C. Moran. (1982). Ecology and management of cactus weeds in South Africa.. South African Journal of Science. 78(8). 314–320. 21 indexed citations

19.

Zimmermann, H. G.. (1982). The ecology and control of Opuntia Aurantiaca in South Africa in relation to the cochineal insect, Dactylopius Austrinus. 9 indexed citations

20.

Zimmermann, H. G., et al.. (1979). Annotated list of some cactus-feeding insects of South America.. 33(2). 101–112. 34 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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