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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Plant Science and Agronomy 72 610 562 182 164 194 28967

Gary E. Harman publications per year

The chart shows the history of publications by Gary E. Harman between 1970 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Gary E. Harman published across 55 years, from 1970 to 2024, averaging 4.2 papers a year. Output peaked at 15 publications in 1994. 6 of the 229 publications appeared in the last two years.

No. of publications
5 10 15
Bar chart. Horizontal axis: year, 1970 to 2024. Vertical axis: number of publications, 0 to 15. Peak 15 publications in 1994. 1970: 1 publication 1971: 2 publications 1972: 4 publications 1973: 2 publications 1974: 3 publications 1975: 2 publications 1976: 2 publications 1977: 0 publications 1978: 2 publications 1979: 1 publication 1980: 6 publications 1981: 3 publications 1982: 3 publications 1983: 3 publications 1984: 2 publications 1985: 4 publications 1986: 3 publications 1987: 2 publications 1988: 10 publications 1989: 3 publications 1990: 9 publications 1991: 9 publications 1992: 6 publications 1993: 12 publications 1994: 15 publications 1995: 2 publications 1996: 10 publications 1997: 3 publications 1998: 14 publications 1999: 6 publications 2000: 6 publications 2001: 6 publications 2002: 1 publication 2003: 2 publications 2004: 8 publications 2005: 3 publications 2006: 8 publications 2007: 4 publications 2008: 7 publications 2009: 1 publication 2010: 6 publications 2011: 4 publications 2012: 3 publications 2013: 0 publications 2014: 3 publications 2015: 0 publications 2016: 0 publications 2017: 2 publications 2018: 0 publications 2019: 3 publications 2020: 0 publications 2021: 3 publications 2022: 9 publications 2023: 4 publications 2024: 2 publications
1970 2024

229 publications in total across all disciplines

View publications per year as a table
Gary E. Harman: publications per year, 1970 to 2024
Year Publications
1970 1
1971 2
1972 4
1973 2
1974 3
1975 2
1976 2
1977 0
1978 2
1979 1
1980 6
1981 3
1982 3
1983 3
1984 2
1985 4
1986 3
1987 2
1988 10
1989 3
1990 9
1991 9
1992 6
1993 12
1994 15
1995 2
1996 10
1997 3
1998 14
1999 6
2000 6
2001 6
2002 1
2003 2
2004 8
2005 3
2006 8
2007 4
2008 7
2009 1
2010 6
2011 4
2012 3
2013 0
2014 3
2015 0
2016 0
2017 2
2018 0
2019 3
2020 0
2021 3
2022 9
2023 4
2024 2
Total 229
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Gary E. Harman publication distribution in Plant Science and Agronomy in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Plant Science and Agronomy in 2026. The highlighted bar marks where Gary E. Harman sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 88 bars. Horizontal axis: publications, 36–40 to 467+. Vertical axis: number of scientists, 0 to 255. Most scientists, 255, have 111–115 publications. The last bar groups every scientist with 467 publications or more. The highlighted bar, 191–195 publications, is where this scientist sits. 36–40 publications: 2 scientists 41–45 publications: 7 scientists 46–50 publications: 40 scientists 51–55 publications: 58 scientists 56–60 publications: 60 scientists 61–65 publications: 107 scientists 66–70 publications: 130 scientists 71–75 publications: 153 scientists 76–80 publications: 191 scientists 81–85 publications: 199 scientists 86–90 publications: 206 scientists 91–95 publications: 218 scientists 96–100 publications: 226 scientists 101–105 publications: 227 scientists 106–110 publications: 247 scientists 111–115 publications: 255 scientists 116–120 publications: 253 scientists 121–125 publications: 233 scientists 126–130 publications: 219 scientists 131–135 publications: 201 scientists 136–140 publications: 194 scientists 141–145 publications: 176 scientists 146–150 publications: 157 scientists 151–155 publications: 147 scientists 156–160 publications: 151 scientists 161–165 publications: 159 scientists 166–170 publications: 137 scientists 171–175 publications: 128 scientists 176–180 publications: 126 scientists 181–185 publications: 98 scientists 186–190 publications: 114 scientists 191–195 publications: 100 scientists 196–200 publications: 90 scientists 201–205 publications: 71 scientists 206–210 publications: 98 scientists 211–215 publications: 70 scientists 216–220 publications: 86 scientists 221–225 publications: 61 scientists 226–230 publications: 58 scientists 231–235 publications: 53 scientists 236–240 publications: 64 scientists 241–245 publications: 39 scientists 246–250 publications: 46 scientists 251–255 publications: 51 scientists 256–260 publications: 36 scientists 261–265 publications: 44 scientists 266–270 publications: 35 scientists 271–275 publications: 30 scientists 276–280 publications: 33 scientists 281–285 publications: 35 scientists 286–290 publications: 36 scientists 291–295 publications: 26 scientists 296–300 publications: 26 scientists 301–305 publications: 31 scientists 306–310 publications: 30 scientists 311–315 publications: 21 scientists 316–320 publications: 29 scientists 321–325 publications: 14 scientists 326–330 publications: 15 scientists 331–335 publications: 15 scientists 336–340 publications: 17 scientists 341–345 publications: 15 scientists 346–350 publications: 12 scientists 351–355 publications: 17 scientists 356–360 publications: 18 scientists 361–365 publications: 12 scientists 366–370 publications: 11 scientists 371–375 publications: 6 scientists 376–380 publications: 6 scientists 381–385 publications: 11 scientists 386–390 publications: 9 scientists 391–395 publications: 10 scientists 396–400 publications: 8 scientists 401–405 publications: 4 scientists 406–410 publications: 9 scientists 411–415 publications: 11 scientists 416–420 publications: 4 scientists 421–425 publications: 7 scientists 426–430 publications: 4 scientists 431–435 publications: 3 scientists 436–440 publications: 5 scientists 441–445 publications: 8 scientists 446–450 publications: 6 scientists 451–455 publications: 7 scientists 456–460 publications: 5 scientists 461–465 publications: 6 scientists 466 publications: 2 scientists 467+ publications: 99 scientists
36–40 publications 467+

This scientist: 194 publications — 75th percentile

75% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 467 publications or more.

View publications distribution as a table
Number of Plant Science and Agronomy scientists by publication count, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
Publications Scientists This scientist
36–40 2
41–45 7
46–50 40
51–55 58
56–60 60
61–65 107
66–70 130
71–75 153
76–80 191
81–85 199
86–90 206
91–95 218
96–100 226
101–105 227
106–110 247
111–115 255
116–120 253
121–125 233
126–130 219
131–135 201
136–140 194
141–145 176
146–150 157
151–155 147
156–160 151
161–165 159
166–170 137
171–175 128
176–180 126
181–185 98
186–190 114
191–195 100 194
196–200 90
201–205 71
206–210 98
211–215 70
216–220 86
221–225 61
226–230 58
231–235 53
236–240 64
241–245 39
246–250 46
251–255 51
256–260 36
261–265 44
266–270 35
271–275 30
276–280 33
281–285 35
286–290 36
291–295 26
296–300 26
301–305 31
306–310 30
311–315 21
316–320 29
321–325 14
326–330 15
331–335 15
336–340 17
341–345 15
346–350 12
351–355 17
356–360 18
361–365 12
366–370 11
371–375 6
376–380 6
381–385 11
386–390 9
391–395 10
396–400 8
401–405 4
406–410 9
411–415 11
416–420 4
421–425 7
426–430 4
431–435 3
436–440 5
441–445 8
446–450 6
451–455 7
456–460 5
461–465 6
466 2
467+ 99
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Gary E. Harman D-index placement in Plant Science and Agronomy in 2026

The chart shows the D-index (discipline H-index) distribution of Plant Science and Agronomy scientists ranked by Research.com in 2026. The highlighted bar marks where Gary E. Harman sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 80 bars. Horizontal axis: D-Index, 30 to 109+. Vertical axis: number of scientists, 0 to 288. Most scientists, 288, have 34 D-Index. The last bar groups every scientist with 109 D-Index or more. The highlighted bar, 72 D-Index, is where this scientist sits. 30 D-Index: 200 scientists 31 D-Index: 236 scientists 32 D-Index: 253 scientists 33 D-Index: 283 scientists 34 D-Index: 288 scientists 35 D-Index: 240 scientists 36 D-Index: 246 scientists 37 D-Index: 243 scientists 38 D-Index: 247 scientists 39 D-Index: 229 scientists 40 D-Index: 232 scientists 41 D-Index: 230 scientists 42 D-Index: 228 scientists 43 D-Index: 219 scientists 44 D-Index: 193 scientists 45 D-Index: 164 scientists 46 D-Index: 158 scientists 47 D-Index: 143 scientists 48 D-Index: 131 scientists 49 D-Index: 127 scientists 50 D-Index: 122 scientists 51 D-Index: 122 scientists 52 D-Index: 110 scientists 53 D-Index: 102 scientists 54 D-Index: 98 scientists 55 D-Index: 79 scientists 56 D-Index: 85 scientists 57 D-Index: 88 scientists 58 D-Index: 91 scientists 59 D-Index: 62 scientists 60 D-Index: 61 scientists 61 D-Index: 59 scientists 62 D-Index: 54 scientists 63 D-Index: 61 scientists 64 D-Index: 59 scientists 65 D-Index: 58 scientists 66 D-Index: 41 scientists 67 D-Index: 49 scientists 68 D-Index: 39 scientists 69 D-Index: 32 scientists 70 D-Index: 40 scientists 71 D-Index: 47 scientists 72 D-Index: 38 scientists 73 D-Index: 28 scientists 74 D-Index: 29 scientists 75 D-Index: 28 scientists 76 D-Index: 22 scientists 77 D-Index: 21 scientists 78 D-Index: 25 scientists 79 D-Index: 26 scientists 80 D-Index: 19 scientists 81 D-Index: 16 scientists 82 D-Index: 12 scientists 83 D-Index: 16 scientists 84 D-Index: 14 scientists 85 D-Index: 11 scientists 86 D-Index: 17 scientists 87 D-Index: 13 scientists 88 D-Index: 10 scientists 89 D-Index: 12 scientists 90 D-Index: 18 scientists 91 D-Index: 16 scientists 92 D-Index: 16 scientists 93 D-Index: 17 scientists 94 D-Index: 12 scientists 95 D-Index: 8 scientists 96 D-Index: 9 scientists 97 D-Index: 9 scientists 98 D-Index: 11 scientists 99 D-Index: 12 scientists 100 D-Index: 5 scientists 101 D-Index: 8 scientists 102 D-Index: 4 scientists 103 D-Index: 11 scientists 104 D-Index: 5 scientists 105 D-Index: 9 scientists 106 D-Index: 7 scientists 107 D-Index: 4 scientists 108 D-Index: 8 scientists 109+ D-Index: 99 scientists
30 D-Index 109+

This scientist: 72 D-Index — 91st percentile

91% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 109 D-Index or more.

View D-Index distribution as a table
Number of Plant Science and Agronomy scientists by D-index, Research.com 2026 ranking edition. Based on 6,494 ranked scientists.
D-Index Scientists This scientist
30 200
31 236
32 253
33 283
34 288
35 240
36 246
37 243
38 247
39 229
40 232
41 230
42 228
43 219
44 193
45 164
46 158
47 143
48 131
49 127
50 122
51 122
52 110
53 102
54 98
55 79
56 85
57 88
58 91
59 62
60 61
61 59
62 54
63 61
64 59
65 58
66 41
67 49
68 39
69 32
70 40
71 47
72 38 72
73 28
74 29
75 28
76 22
77 21
78 25
79 26
80 19
81 16
82 12
83 16
84 14
85 11
86 17
87 13
88 10
89 12
90 18
91 16
92 16
93 17
94 12
95 8
96 9
97 9
98 11
99 12
100 5
101 8
102 4
103 11
104 5
105 9
106 7
107 4
108 8
109+ 99
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Overview

What is he best known for?

The fields of study he is best known for:

  • Enzyme
  • Botany
  • Fungus

Gary E. Harman mainly focuses on Trichoderma harzianum, Trichoderma, Botany, Biological pest control and Endochitinase activity. His Trichoderma harzianum research is multidisciplinary, relying on both Fungi imperfecti, Biochemistry, Microbiology, Botrytis cinerea and Pythium ultimum. His Trichoderma study is concerned with the larger field of Biotechnology.

His work deals with themes such as Plant disease resistance, Colonization, Abiotic component and Horticulture, which intersect with Botany. His research in Biological pest control intersects with topics in Natural enemies and Pythium. His studies deal with areas such as cDNA library, Open reading frame and Chromatography, Agarose as well as Endochitinase activity.

His most cited work include:

  • Trichoderma species--opportunistic, avirulent plant symbionts. (2204 citations)
  • Myths and Dogmas of Biocontrol Changes in Perceptions Derived from Research on Trichoderma harzinum T-22. (749 citations)
  • Induced Systemic Resistance and Plant Responses to Fungal Biocontrol Agents (700 citations)

What are the main themes of his work throughout his whole career to date?

His primary scientific interests are in Botany, Trichoderma harzianum, Trichoderma, Microbiology and Biological pest control. His research investigates the link between Botany and topics such as Plant disease resistance that cross with problems in Genetically modified crops and Apple scab. His Trichoderma harzianum study combines topics in areas such as Botrytis cinerea, Endochitinase activity, Agronomy and Strain.

While the research belongs to areas of Trichoderma, Gary E. Harman spends his time largely on the problem of Fungi imperfecti, intersecting his research to questions surrounding Protoplast. His Microbiology research is multidisciplinary, incorporating perspectives in Enzyme, Chitinase, Cellulase and Transformation. He has included themes like Biotechnology, Natural enemies and Colonization in his Biological pest control study.

He most often published in these fields:

  • Botany (36.16%)
  • Trichoderma harzianum (31.64%)
  • Trichoderma (27.12%)

What were the highlights of his more recent work (between 2005-2021)?

  • Trichoderma (27.12%)
  • Botany (36.16%)
  • Trichoderma harzianum (31.64%)

In recent papers he was focusing on the following fields of study:

Gary E. Harman spends much of his time researching Trichoderma, Botany, Trichoderma harzianum, Biotechnology and Microorganism. His Trichoderma research integrates issues from Proteome, Agronomy, Proteomics, Microbiology and Biological pest control. His Microbiology research is multidisciplinary, incorporating elements of Transcriptome and Enzyme, Chitinase.

Gary E. Harman has researched Botany in several fields, including Competition and Abiotic component. His work carried out in the field of Trichoderma harzianum brings together such families of science as Peroxidase, Genetics and Abiotic stress. The study incorporates disciplines such as Substrate, Food science, Trichoderma viride and Organic fertilizer in addition to Microorganism.

Between 2005 and 2021, his most popular works were:

  • Induced Systemic Resistance and Plant Responses to Fungal Biocontrol Agents (700 citations)
  • Overview of Mechanisms and Uses of Trichoderma spp. (669 citations)
  • Translational Research on Trichoderma: From 'Omics to the Field (351 citations)

In his most recent research, the most cited papers focused on:

  • Botany
  • Enzyme
  • Fungus

His main research concerns Trichoderma, Botany, Biotechnology, Trichoderma harzianum and Abiotic component. His research integrates issues of Plant growth, Agronomy, Proteomics and Biological pest control in his study of Trichoderma. His Biological pest control research incorporates elements of Transcriptome, Thallus, Photosynthetic efficiency, Nutrient and Fungus.

In his papers, he integrates diverse fields, such as Botany and Materials science. The various areas that he examines in his Trichoderma harzianum study include Biotic stress, Seed treatment, Germination, Peroxidase and Shoot. His research in Abiotic component intersects with topics in Pythium ultimum, Fungi imperfecti, Abiotic stress and Seedling.

Best Publications

  • Trichoderma species--opportunistic, avirulent plant symbionts.

    Gary E. Harman;Charles R. Howell;Ada Viterbo;Ilan Chet

  • Myths and Dogmas of Biocontrol Changes in Perceptions Derived from Research on Trichoderma harzinum T-22.

    G E Harman

  • Overview of Mechanisms and Uses of Trichoderma spp.

    Gary E. Harman

  • Induced Systemic Resistance and Plant Responses to Fungal Biocontrol Agents

    Michal Shoresh;Gary E. Harman;Fatemeh Mastouri

  • Solubilization of phosphates and micronutrients by the plant-growth-promoting and biocontrol fungus trichoderma harzianum rifai 1295-22

    C. Altomare;W. A. Norvell;T. Björkman;G. E. Harman

  • Translational Research on Trichoderma: From 'Omics to the Field

    Matteo Lorito;Sheridan L. Woo;Gary E. Harman;Enrique Monte

  • CHITINOLYTIC ENZYMES PRODUCED BY TRICHODERMA HARZIANUM; ANTIFUNGAL ACTIVITY OF PURIFIED ENDOCHITINASE AND CHITOBIOSIDASE

    M. Lorito;G.E. Harman;C.K. Hayes;R.M. Broadway

  • Genes from mycoparasitic fungi as a source for improving plant resistance to fungal pathogens.

    Matteo Lorito;Sheridan L. Woo;Irene Garcia Fernandez;Gabriella Colucci

  • Seed Treatment with Trichoderma harzianum Alleviates Biotic, Abiotic, and Physiological Stresses in Germinating Seeds and Seedlings

    Fatemeh Mastouri;Thomas Björkman;Gary E. Harman

  • Parallel formation and synergism of hydrolytic enzymes and peptaibol antibiotics, molecular mechanisms involved in the antagonistic action of Trichoderma harzianum against phytopathogenic fungi

    M. Schirmböck;M. Lorito;Yong-Li Wang;C. K. Hayes

  • Concepts and Technologies of Selected Seed Treatments

    and A G Taylor;G E Harman

  • Multifunctional fungal plant symbionts: new tools to enhance plant growth and productivity.

    Gary E. Harman

  • Purification, characterization, and synergistic activity of a glucan 1,3-beta-glucosidase and an N-acetyl-beta-glucosaminidase from Trichoderma harzianum.

    Lorito M;Hayes Ck;Di Pietro A;Woo Sl

  • The Molecular Basis of Shoot Responses of Maize Seedlings to Trichoderma harzianum T22 Inoculation of the Root: A Proteomic Approach

    Michal Shoresh;Gary E. Harman

  • Expression of Endochitinase from Trichoderma harzianum in Transgenic Apple Increases Resistance to Apple Scab and Reduces Vigor.

    Jyothi Prakash Bolar;John L. Norelli;Kwai-Weng Wong;Christopher K. Hayes

  • Synergistic interaction between fungal cell wall degrading enzymes and different antifungal compounds enhances inhibition of spore germination

    Matteo Lorito;Clemens Peterbauer;Christopher K. Hayes;Gary E. Harman

  • Trichoderma and Gliocladium. Volume 2: Enzymes, biological control and commercial applications

    Gary E. Harman;Christian P. Kubicek

  • Interactions Between Trichoderma harzianum Strain T22 and Maize Inbred Line Mo17 and Effects of These Interactions on Diseases Caused by Pythium ultimum and Colletotrichum graminicola

    Gary E. Harman;Rixana Petzoldt;Alfio Comis;Jie Chen

  • Combining effective strains of Trichoderma harzianum and solid matrix priming to improve biological seed treatments

    G. E Harman;A. G Taylor;T. E Stasz

  • Synergistic interaction between cell wall degrading enzymes and membrane affecting compounds

    M. Lorito;S. L. Woo;M. D'ambrosio;G. E. Harman

  • Synergistic activity of endochitinase and exochitinase from Trichoderma atroviride (T. harzianum) against the pathogenic fungus (Venturia inaequalis) in transgenic apple plants

    Jyothi Prakash Bolar;John L. Norelli;Gary E. Harman;Susan K. Brown

  • Growth Enhancement of shrunken-2 (sh2) Sweet Corn by Trichoderma harzianum 1295-22: Effect of Environmental Stress

    Thomas Björkman;Lisa M. Blanchard;Gary E. Harman

Frequent Co-Authors

Matteo Lorito
Matteo Lorito University of Naples Federico II
Sheridan L. Woo
Sheridan L. Woo University of Naples Federico II
Alan G. Taylor
Alan G. Taylor Cornell University
Antonio Di Pietro
Antonio Di Pietro University of Córdoba
Felice Scala
Felice Scala University of Naples Federico II
Herb S. Aldwinckle
Herb S. Aldwinckle Cornell University
Eric B. Nelson
Eric B. Nelson Cornell University
Ilan Chet
Ilan Chet Hebrew University of Jerusalem
John L. Norelli
John L. Norelli United States Department of Agriculture

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