Pesticide usage in Scotland: Grassland and Fodder Crops 2021

This publication presents information from a survey of pesticide use on grassland and fodder crops in Scotland during 2021.


Table 11: Mode of action/chemical group of herbicide active substances on all grass and fodder crops – 2021

Area (ha) and weight (kg) of active substances for all crops

Mode of action Active substance Chemical group HRAC group Total grass and fodder 2021 Total grass and fodder 2021
        ha kg
Inhibition of acetyl CoA carboxylase Fluazifop-P-butyl Aryloxyphenoxy-propionates (FOPs) 1 180 33
  Propaquizafop Aryloxyphenoxy-propionates (FOPs) 1 43 2
All inhibition of acetyl CoA carboxylase       222 35
Inhibition of acetolactate synthase ALS Amidosulfuron Sulfonylureas 2 2,144 76
  Iodosulfuron-Methyl-Sodium Sulfonylureas 2 255 0
  Mesosulfuron-Methyl Sulfonylureas 2 255 1
  Metsulfuron-Methyl Sulfonylureas 2 637 3
  Nicosulfuron Sulfonylureas 2 670 29
  Thifensulfuron-Methyl Sulfonylureas 2 513 10
  Tribenuron-Methyl Sulfonylureas 2 512 4
  Triflusulfuron-Methyl Sulfonylureas 2 366 6
  Florasulam Triazolopyrimidine - Type 1 2 1,845 6
All inhibition of acetolactate synthase ALS       7,198 136
Microtubule assembly inhibition Pendimethalin Dinitroanilines 3 1,019 1,165
All microtubule assembly inhibition       1,019 1,165

Cont…

Table 11: Mode of action/chemical group of herbicide active substances on all grass and fodder crops – 2021 continued

Area (ha) and weight (kg) of active substances for all crops

Mode of action Active substance Chemical group HRAC group Total grass and fodder 2021 Total grass and fodder 2021
        ha kg
Auxin mimics 2,4-D Phenoxy-carboxylates 4 16,140 16,349
  2,4-DB Phenoxy-carboxylates 4 331 359
  Aminopyralid Phenoxy-carboxylates 4 2,783 137
  Clopyralid Pyridine-carboxylates 4 14,267 2,004
  Dicamba Benzoates 4 2,486 754
  Fluroxypyr Pyridyloxy-carboxylates 4 24,738 5,953
  Halauxifen-methyl Pyridine-carboxylates 4 326 1
  MCPA Phenoxy-carboxylates 4 21,869 23,439
  Mecoprop-P Phenoxy-carboxylates 4 342 216
  Quinmerac Quinoline-carboxylates 4 84 6
  Triclopyr Pyridyloxy-carboxylates 4 22,519 6,547
All auxin mimics       105,886 55,764
Inhibition of photosynthesis at photosystem II (Serine 264 Binders) Lenacil Uracils 5 471 80
  Metamitron Triazinones 5 2,174 2,167
  Phenmedipham Phenlcarbamates 5 945 244
All inhibition of photosynthesis at photosystem II       3,589 2,491

Cont…

Table 11: Mode of action/chemical group of herbicide active substances on all grass and fodder crops – 2021 continued

Area (ha) and weight (kg) of active substances for all crops

Mode of action Active substance Chemical group HRAC group Total grass and fodder 2021 Total grass and fodder 2021
        ha kg
Inhibition of EPSP synthase Glyphosate Glycine 9 8,227 12,699
All inhibition of EPSP synthase       8,227 12,699
Inhibition of phytoene desaturase Diflufenican Phenyl ethers 12 331 13
  Picolinafen Phenyl ethers 12 45 2
All inhibition of phytoene desaturase       375 15
Inhibition of deoxy-D-xyulose phosphate synthase Clomazone Isoxazolidinone 13 986 58
All inhibition of deoxy-D-xyulose phosphate synthase       986 58
Inhibition of VLCFAs Dimethenamid-P α-Chloroacetamides 15 1,332 816
  Ethofumesate Benzofurans 15 1,214 292
  Metazachlor α-Chloroacetamides 15 2,513 1,251
All inhibition of VLCFAs       5,059 2,360
Inhibition of DHP Asulam Carbamate 18 42 187
All inhibition of DHP       42 187
Inhibition of hydroxyphenyl pyruvate dioxygenase Mesotrione Triketone 27 670 82
All inhibition of hydroxyphenyl pyruvate dioxygenase       670 82
Unknown mode of action Napropamide Acetamides 0 167 94
All unknown mode of action       167 94
All herbicides       133,440 75,085
Area grown       4,395,840  

Note: active substances have been grouped by their mode of action. Full details on mode of action classification can be found on the Herbicide Resistance Action Committee (HRAC) webpage(12).

Contact

Email: psu@sasa.gov.scot

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