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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