Every four years, the International Weed Science Society (IWSS) bestows awards to weed scientists who exemplify outstanding performance in science and service, during the International Weed Science Congress. Very relevant for receiving this particular award are the candidate’s contributions to weed science made outside of one’s job description, and outside of their employer’s work hours. It is those individuals who volunteer to serve who are particularly worthy of this recognition. IWSS Awardees have:

Sr. No.	Name	Country	Year	Photo
1	Lewis I. Okafor	Nigria	1990
2	LeRoy Holm	USA	1991
3	Larry Burrill	USA	1992
4	Chris Parker	UK	1992
5	Chester McWhorter	USA	1993
6	Harry Combellack	Australia	1993
7	V. M. Bhan	India	1995
8	Ramiro de la Cruz	Colombia	1996
9	Chester L. Foy	USA	1996
10	R. K. Malik	India	1997
11	Ralph C. Kirkwood	UK	1997
12	Rashid A. Shad	Pakistan	2000
13	Barakat Abu-Irmaileh	Jordan	2004
14	Jonathan Gressel	Israel	2008
15	Aurora Baltazar	Philippines	2012
16	Jerry Doll	USA	2012
17	Stephen O Duke	USA	2012
18	Ricardo E Labrada	Cuba	2012
19	Bernal Valverde	Costa Rica	2016
20	Jens Streibig	Denmark	2016
21	Marco Quadranti	Switzerland	2016
22	Prasanta Bhowmik	USA	2016
23	Albert Fischer	USA	2020
24	Baruch Rubin	Israel	2020
25	Carol Mallory-Smith	USA	2020
26	Steve Powles	Australia	2020

Larry C Burrill Award (Student)

Larry C. Burrill (1936-2008) was one of the prime movers in getting IWSS launched and organized as the meaningful entity it is today with about 750 members. Since its inception, Larry served as Secretary-Treasurer of IWSS for several years (1976-1986). Larry Burrill, at the then International Plant Protection Center at Oregon State University, did a great deal of educational work around the world and labored tremendously to put weed science in an international forefront so that it would reach less developed nations. Numerous international students greatly benefited from Larry’s understanding of weed control around the world. The IWSS Board of Directors at its 2007 annual meeting in San Antonio during the WSSA conference decided to award a prize to a selected student, which would provide full funding to support his/her attendance to the IWSS Congress. This special IWSS award will be called the LARRY C. BURRILL AWARD to honor Larry’s memorable contributions to IWSS. 

Sr. No.	Name	Country	Year	Project Title	Photo
1	Marites A. Sales	Univ. of Arkansas, USA	2008	Transcriptome profile of red rice (Oryza sativa L.) in response to different nitrogen levels
2	M.S. Ahmad-Hamdani	University of Western Australia	2012	Herbicide resistance-endowing ACCase mutations in hexaploid wild oat (Avena fatua): What can we expect in resistance evolution in a hexaploid species?
3	Chenxi Wu	USA	2016

Sr. No.	Name	Country	Year	Project Title	Photo
1	Hamed Abbas	USA	2000	The structure-activity relationships of fungal toxins that disrupt sphingolipid biosynthesis in plant and animal systems
2	Pedro Alves	Brazil	2000	Identification and characterization of itchgrass accessions
3	Ulisses Antuniassi	Brazil	2000	Mechanical removal of aquatic weeds: operational and economic, analysis
4	Scott Baerson	Malayasia	2000	Characterization of a glyphosate-resistant Eleusine indica biotype from Malaysia
5	Diego Batffa	Argentina	2000	Effects of soil water status and depth of burial on dormancy changes in Polygonum aviculare seeds
6	Diego Bentisegna	Argentina	2000	Growth of Potamogeton pectinatus in the irrigation system of the Rio Colorado, Argentina
7	Jamil Constantin	Brazil	2000	Azafenidin: A new herbicide for weed control in Eucalyptus camaldulensis
8	Tomilea Dillon	USA	2000	Control of red rice (Oryza sativa) and other difficult weeds in imidazolinone-tolerant (ClearField) rice
9	Friday Ekeleme	Nigeria	2000	Planted fallow reduces weed seed bank in southwestern Nigeria
10	Geoff Hurrell	Newzealand	2000	Cirsium arvense control using Sclerotinia sclerotiorum
11	Deirdre Lemerle	Australia	2000	Breeding for strongly competitive cultivars of wheat in Australia
12	Rachel Melland	Australia	2000	Integrated control of Chrysanthemoides monilifera in temperate natural ecosystems in southern Australia
13	Festus Murithi	Kenya	2000	Approach to weed management practices in the maize cropping systems of the eastern highlands of Kenya
14	David Ndungu	Kenya	2000	Fodder legume effects on Striga hermonthica germination and parasitism infestation of maize
15	Rico Pamplona	Philippines	2000	Seedling recruitment of Echinochloa crus-galli in relation to rice cultivar and crop establishment method
16	Jorge Perdigon	Argentina	2000	Phytotoxic persistence of chlorimuron and metasulfuron in soils of the Pampean region of Argentina
17	Eduardo Puricelli	Argentina	2000	Effects of glyphosate doses and soybean planting system on Anoda cristata biomass and seed production
18	Claudio Purissimo	Brazil	2000	Effectiveness of postemergence herbicides following early preplant applications of sulfosate in no-tillage soybeans
19	Susan Timmins	New Zealand	2000	Eradicate this weed or not?
20	Craig Walton	Australia	2000	National weedbuster week: linking weed communication and action across Australia
21	Ondina Landazuri	Ecuador	2002	Ecology of Rubus niveus in Santa Cruz Island, Galapagos
22	Renan Gravena	Brazil	2000	Interference periods of Cyperus rotundus in sugarcane (Saccharum spp.)
23	Nubia Correia	Brazil	2002	Sorghum straw and imazamox herbicide for weed control in soybeans
24	Wilson Avila	Universidad Autonoma de Chapingo, Mexico	2004
25	Tienke Cowan	Univ. of New England, Australia	2004
26	Anna Golisz	Warsaw Agric. Univ., Poland	2004
27	Julio Scursoni	Univ. de Buenos Aires, Argentina	2004
28	Matola Tunde	Institute of Chemistry, Hungarian Academy Sci., Hungary	2004
29	Bolette Pedersen	Univ. Western Australia, Australia	2004
30	Santiago Poggio	Univ. de Buenos Aires, Argentina	2004
31	Fabrice Roux	Institut National de la Recherche Agronomique, France	2004
32	Irfan Rashid	University of Kashmir, India	2008
33	Cody J. Gray	Mississippi State Univ. , USA	2004
34	Mithila Jugulam	University of Guelph, Canada	2004
35	Kevin Kelley	University of Illinois, USA	2004
36	Eric Page	Washington State Univ., USA	2004
37	William Patzoldt	University of Illinois, USA	2004
38	Vinod Shivrain	Univ. of Arkansas, USA	2004
39	Tsafrir Weinberg	University of Guelph, Canada	2004
40	Hagai Yasuor	Hebrew Univ. Jerusalem, Israel	2004
41	Puja Ray	NRCWS, India	2008
42	Elena Sanchez-Olguin	Oregon State University, USA	2008
43	Maria Zappiola	Oregon State University, USA	2008
44	Dana Ziv	The Hebrew University of Jerusalem, Israel	2008
45	Muthu Bagavathiannan	University of Manitoba, Canada	2008
46	Sanjeev Bangarwa	Univ. of Arkansas, USA	2008
47	Barbara Baraibar	Univ. of Lleida, Spain	2008
48	Robeto Busi	Univ. of West Australia, Australia	2008
49	Seyed Eslami	Univ. of Birjand, Iran	2008
50	Mitra Ghotbi	Shahed Univ., Iran	2008
51	Inbar Greenspoon	The Hebrew Univ. of Jerusalem, Israel	2008
52	Eva Kohlschmid	Univ. of Hohenheim, Germany	2008
53	Fabiane Lamego	Univ. of Arkansas, USA	2008
54	Pauline Lang	Univ. of Glasgow, Scotland, UK	2008
55	Claudia Marchesi	Univ. of California, USA	2008
56	Biancha Martins	Oregon State Univ., USA	2008
57	Claudia Morvillo	Univ. of Buenos Aires, Argentina	2008
58	Santiago Poggio	Univ. of Buenos Aires, Argentina	2008
59	Michael Quinn	Oregon State Univ., USA	2008
60	Vinod Shivrain	Univ. of Arkansas, USA	2008
61	Daljit Singh	Purdue Univ., USA	2008
62	Lena Ulber	Univ. of Gottingen, Germany	2008
63	Tatiana Vega	National Univ. of Rosario, Argentina	2008
64	Susie Warner	CSIRO, Aurstralia	2008
65	Lynise Wearne	CSIRO, Australia	2008
66	Maria John	Univ. of Rostock, Germany	2008
67	Colin Yates	Ontario Terrestrial Invasive Plants Council, Canada	2008
68	Nguyen Thi Lan Thi	Ho Chi Minh National University, Vietnam	2011	The invasion of mimosa (Mimosa pigra L.) at Tram Chim National Park, Dong Thap province
69	Apaitia Macanawai	Ministry of Primary Industries, Fiji	2011	Vegetative growth and development of Mikania micrantha in taro and cassava production in Viti Levu Fiji
70	Zahid Hanif	Department of Agriculture, Peshawar, Pakistan	2011	Characterization of the reproductive behaviors and invasive potential of Parthenium in Australia
71	Martins , Bianca A.B	Oregon State University, USA	2012	Gene flow between Clearfield® wheat and jointed goatgrass (Aegilops cylindrica)
72	Nunes, Anderson L.	Federal Univ of Rio Grande do Sul, Porto Alegre, Brazil	2012	Nucleotide variability and genetic regulation of seed shattering in Brazilian red rice ecotypes
73	Shilo, Tal	Newe‐Yaar Research Center, Israel	2012	Trafficking of Macromolecules in the Parasitism Association between Egyptian broomrape (Phelipanche aegyptiaca) and tomato (Solanum lycopersicum)
74	Haile, Teketel A.	University of Saskatchewan, Canada	2012	Harvest loss in canola and the problem of volunteer weeds
75	Salas, Reiofeli A.	University of Arkansas, USA	2012	Resistance to glyphosate in Italian ryegrass populations from Arkansas, USA
76	Dvorkin, Gal	Hebrew University of Jerusalem, Israel	2012	Effects of long-term irrigation with reclaimed wastewater on the efficacy and fate of trifloxysulfuron-sodium activity in the soil
77	Mispan, Muhamad S.	South Dakota State University, USA	2012	QTL and Haplotype Analysis of Wild and Crop-Mimic Traits in US Weedy Rice
78	Khan, Rahamdad	Agricultural University of Pakistan	2012	Weed control efficiency of bioherbicides and their impact on grain yield of wheat (Triticum aestivum)
79	Amnon Cochavi	Israel	2012	A thermal-time model for predicting the parasitism of Phelipanche aegyptiaca in carrot (Daucus carrota)
80	Fernando H. Oreja	University of Buenos Aires, Argentina	2012	Effect of soybean crop on the processes that ensure the success of Digitaria sanguilnalis to maintain its population on a field
81	Elena Sanchez	Oregon State Univesity, USA	2012	Evolutionary history of Aegilops cylindrica Host (jointed goatgrass)
82	George M. Botha	University of Arkansas, USA	2012	Differential Response and Tolerance Mechanism of Palmer amaranth to Glufosinate
83	Guo Q. Chen	Nanjing Agricultural University, China	2012	Invasion of Solidago canadensis is causing biotic homogenization in China
84	Gonzalo A.R. Molina	Institute of Physiological and Ecological Research, Argentina	2012	Diversity of weeds and arthropods in fencerows is enhanced when crop types at both adjoining fields
85	Ziv Kleinman	Hebrew University of Jerusalem, Israel	2012	Characterization of resistance mechanism to glyphosate of (Conyza bonariensis)
86	Maor Matzrafi	Hebrew University of Jerusalem, Israel	2012	Multiple herbicide resistance in rigid ryegrass (Lolium rigidum) in Israel
87	Arnab B. Goon	BCKVV, Kalyani, West Bengal, India	2012	Determination of Glyphosate residue in Green Tea, Made Tea and Tea Liquor after derivatisation with 9-fluorenylmethyl chloroformate by LC-ESI-MS/MS
88	Asad Shabbir	University of Queensland, Australia	2012	The current and potential geographic distribution of Parthenium weed in Pakistan
89	Alexandra M. Knight	North Carolina State University, USA	2012	Effect of weed removal time on corn yield as affected by nitrogen source and rate
90	Mariela Lodovichi	Universidad Nacional del Sur, Argentina	2012	Operational planning model for optimal herbicide-based weed management in winter crops
91	Yan Sun	University of Fribourg, Switzerland	2012	High per-capita effect of a plant invader on its neighbors away but invader size matters at home
92	Te Ming Tseng	University of Arkansas, USA	2012	Evolutionary divergence of seed dormancy in US weedy red rice
93	Abolfazl Derakhshan	Gorgan University, Iran	2012	Tribenuron-methyl Resistant-Turnipweed (Rapistrum rugosum) from Iran
94	Ying‐Hui Li	South China Agricultural University, China	2012	A paraquat-resistant goosegrass biotype found in China
95	Fabiane Lamego	Brazil	2012	ALS resistance in polyploid beggarticks (Bidens subalternans)
96	Sandya R. Kesoju	USA	2015	Alfalfa transgene dispersal and adventitious presence: understanding grower perception of risk
97	Meenakshi Sangwan	India	2015	Efficacy of herbicides mixture and sequential herbicidal application in cluster bean and their residualeffect on succeeding mustard in two texturally different soils
98	Matzrafi Maor	Israel	2016	Climate changes increase the risk for herbicide resistance evolution
99	Amnon Cochavi	Israel	2016	Early recognition of broomrape parasitism by physiological measurements and narrow-band spectral signatures
100	Amnon Cochavi	Israel	2016	Early recognition of broomrape parasitism by physiological measurements and narrow-band spectral signatures
101	Christine Markus	Brazil	2016	Functional epigenetic regulation is required for herbicide resistance in Arabidopsis thaliana
102	Ariel Noam	Israel	2016
103	Kleinman Ziv	Israel	2016
104	Somerville Gayle J.	Australia	2016
105	Chong Yang	China	2016
106	Charles M. Geddes	Canada	2016
107	Reiofeli A. Salas	USA	2016
108	Siso Dana	Israel	2016
109	Bitomský Martin	Czech Republic	2016
110	Chen Yin	USA	2016
111	Writuparna Dutta	India	2016
112	Faisal Islam	China	2016
113	Jane Morrison	Spain	2016
114	Debalin Sarangi	USA	2016
115	Viji Nagaranjan	India	2016
116	Jian Wang	China	2016
117	Pedroso R. l. Munhoz	USA	2016
118	Ranaldo Marzia	Italy	2016
119	Jin Won Kim	Korea	2016
120	CE Rouse	USA	2016
121	Tal Shilo	Israel	2016
122	Dalazen Giliardi	Brazil	2016
123	Ainhoa Zulet González	Spain	2016
124	Breanne D. Tideman	Canada	2016
125	Amit Paporisch	Israel	2016
126	Jose Andrade	Argentina	2016
127	Escalada M. Fernández	Spain	2016
128	Hadar Kuzikaro	Israel	2016
129	Juliane Hahn	Germany	2016
130	Maninder Kaur	India	2016
131	Husam SM Khalaf	Australia	2016
132	Mercedes Gil	Argentina	2016
133	Vinay Kumar Sindhu	India	2016
134	Jong-Seok Song	Korea	2016
135	Strehlow Becke	Germany	2016
136	Alonso Maria Ayuso	Spain	2016
137	Pete Allen Berry	USA	2016
138	Birger Nitzan	Israel	2016
139	Caio A. C. G. Brunharo	Brazil	2016
140	Dibakar Ghosh	India	2016
141	Kassio Mendes	Brazil	2016
142	Spencer Samuelson	USA	2016
143	Derek J.Sebastian	USA	2016