International Survey of Herbicide-Resistant Weeds

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Status of Herbicide Resistance in Israel - Maor Matzrafi : April, 2015

During the last couple of years we are running a survey to try and understand the magnitude of herbicide resistance in the southern part of Israel where wheat is the most common crop. We have identified some false positive herbicide resistant reports due to miss application of herbicides, especially ACCase inhibitors. Over all, the cases found are mostly based on NTS mechanism but laboratory experiments are still in progress to base those assumptions. Our Conyza canadensis have developed resistance due to two target site mutations in the ALS and PSII genes in the same individual plants (real multiple resistances). Avena sterilis also showed mutation in the ACCase gene and this population is still under investigation. After several field trials that have been conducted this year in wheat fields; we believe that the answer for the resistance in grass weeds might be pre-em treatments with VLCFA herbicides. Our goal is to convince our farmers to do so in the next few years.

Best regards, Maor and Baruch
Herbicide Resistant Weeds in Israel
Herbicide Resistant Weeds in Israel
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Herbicide Resistant Weeds in Israel
#SpeciesCommon NameFirst YearSite of Action
1 Brachypodium distachyonAnnual FalsebromeIsrael 197523 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		95
2 Alopecurus myosuroidesBlackgrassIsrael 197923 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		94
3 Phalaris paradoxaHood CanarygrassIsrael 197923 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		96
4 Lolium rigidumRigid RyegrassIsrael 197923 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		97
5 Rostraria smyrnacea (=Lophochloa smyrnacea)CatstailIsrael 197923 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		98
6 Polypogon monspeliensisRabbitfoot PolypogonIsrael 197923 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		99
7 Amaranthus blitoidesProstrate PigweedIsrael 198323 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		100
8 Amaranthus hybridus (syn: quitensis)Smooth PigweedIsrael 198623 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		101
9 Amaranthus retroflexusRedroot PigweedIsrael 199123 Inhibition of Acetolactate Synthase (B/2)
 		106
10 Amaranthus blitoidesProstrate PigweedIsrael 199123 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		108
11 Plantago lagopusHare's Foot PlantainIsrael 199223 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		112
12 Conyza bonariensisHairy FleabaneIsrael 199323 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		102
13 Conyza bonariensisHairy FleabaneIsrael 199323 Inhibition of Acetolactate Synthase (B/2)
 		103
14 Conyza canadensisHorseweedIsrael 199323 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		109
15 Phalaris minorLittle seed Canary grassIsrael 199323 Inhibition of Acetyl CoA Carboxylase (A/1)
 		111
16 Cuscuta pentagona (=C. campestris)Field DodderIsrael 199423 Inhibition of Acetolactate Synthase (B/2)
 		104
17 Crypsis schoenoidesSwamp PricklegrassIsrael 199523 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		105
18 Lolium rigidumRigid RyegrassIsrael 199823 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5109
19 Chrysanthemum coronariumCrown daisyIsrael 200023 Inhibition of Acetolactate Synthase (B/2)
 		5220
20 Capsella bursa-pastorisShepherd's-purseIsrael 200023 Inhibition of Acetolactate Synthase (B/2)
 		5465
21 Phalaris paradoxaHood CanarygrassIsrael 200423 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5299
22 Conyza bonariensisHairy FleabaneIsrael 200523 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5464
23 Avena sterilisSterile OatIsrael 200623 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5300
24 Sorghum halepenseJohnsongrassIsrael 200623 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5301
25 Lolium rigidumRigid RyegrassIsrael 200723 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5556
26 Amaranthus palmeriPalmer AmaranthIsrael 200823 Inhibition of Acetolactate Synthase (B/2)
 		9921
27 Diplotaxis erucoidesWhite WallrocketIsrael 201223 Inhibition of Acetolactate Synthase (B/2)
 		5702
28 Erucaria hispanicaSpanish Pink MustardIsrael 201223 Inhibition of Acetolactate Synthase (B/2)
 		5703
29 Lolium rigidumRigid RyegrassIsrael 201323 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		10992
30 Brachypodium distachyonAnnual FalsebromeIsrael 201423 Inhibition of Acetyl CoA Carboxylase (A/1)
 		10990
31 Senecio vernalisEastern GroundselIsrael 201423 Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
Inhibition of Protoporphyrinogen Oxidase (E/14)
Phytoene Desaturase inhibitors (F1/12)
 		10993
32 Sorghum halepenseJohnsongrassIsrael 201723 Inhibition of Acetolactate Synthase (B/2)
 		18159
33 Amaranthus tuberculatus (=A. rudis)Tall WaterhempIsrael 201923 Inhibition of Acetolactate Synthase (B/2)
 		18207
34 Amaranthus albusTumble PigweedIsrael 202323 Inhibition of Acetolactate Synthase (B/2)
 		29280
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Friday, July 11, 2025 .  Available  www.weedscience.org
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