Pesticide Usage in Scotland: Grassland and Fodder Crops 2017

This publication presents information from a survey of pesticide use on grassland and fodder crops in Scotland during 2017.

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Table 13: Mode of action/chemical group of herbicide active substances on all grass and fodder crops – 2017

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

Mode of Action Active substance Chemical Group HRAC Group Total Grass and Fodder 2017 Total Grass and Fodder 2017
ha kg
Inhibition of acetyl CoA carboxylase Propaquizafop Aryloxyphenoxy-propionate ' FOPS' A 69 10
All inhibition of acetyl CoA carboxylase 69 10
Inhibition of acetolactate synthase ALS Amidosulfuron Sulfonylurea B 1,049 42
Metsulfuron-methyl Sulfonylurea B 399 1
Nicosulfuron Sulfonylurea B 31 1
Thifensulfuron-methyl Sulfonylurea B 630 7
Tribenuron-methyl Sulfonylurea B 4,322 25
Triflusulfuron-methyl Sulfonylurea B 771 12
Florasulam Triazolopyrimidine B 745 3
All inhibition of acetolactate synthase ALS 7,947 91
Inhibition of photosynthesis at photosystem II Chloridazon Pyridazinone C1 403 468
Desmedipham Phenyl-carbamate C1 906 59
Lenacil Uracil C1 878 125
Metamitron Triazinone C1 1,013 1,133
Phenmedipham Phenyl-carbamate C1 906 79
Terbuthylazine Triazine C1 131 48

Cont…

Table 13: Mode of action/chemical group of herbicide active substances – 2017 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 2017 Total Grass and Fodder 2017
ha kg
Bromoxynil Nitrile C3 29 1
All inhibition of photosynthesis at photosystem II 4,268 1,914
Bleaching: Inhibition of carotenoid biosynthesis Diflufenican Pyridinecarboxamide F1 72 12
All bleaching: Inhibition of carotenoid biosynthesis 72 12
Bleaching:Inhibition of 4-hydroxyphenyl-pyruvate-d Mesotrione Triketone F2 102 10
All bleaching:Inhibition of 4-hydroxyphenyl-pyruvate-d 102 10
Bleaching: DOXP inhibitors Clomazone Isoxazolidinone F4 784 49
All bleaching: DOXP inhibitors 784 49
Inhibition of EPSP synthase Glyphosate Glycine G 6,083 8,319
All inhibition of EPSP synthase 6,083 8,319
Microtubule assembly inhibition Pendimethalin Dinitroaniline K1 939 954
All microtubule assembly inhibition 939 954
Inhibition of DHP Asulam Carbamate I 6,028 24,817
All inhibition of DHP 6,028 24,817
Inhibition of VLCFAs Dimethenamid-P Chloroacetamide K3 1,304 599
Metazachlor Chloroacetamide K3 2,392 1,100

Cont…

Table 13: Mode of action/chemical group of herbicide active substances– 2017 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 2017 Total Grass and Fodder 2017
ha kg
S-metolachlor Chloroacetamide K3 63 84
All inhibition of VLCFAs 3,759 1,784
Inhibition of lipid synthesis Ethofumesate Benzofuran N 954 114
All inhibition of lipid synthesis 954 114
Action like indole acetic acid 2,4-D Phenoxy-carboxylic acid O 6,150 5,934
2,4- DB Phenoxy-carboxylic acid O 5,105 5,678
MCPA Phenoxy-carboxylic acid O 20,560 26,536
Mecoprop-P Phenoxy-carboxylic acid O 280 105
Aminopyralid Pyridine carboxylic acid O 4,436 243
Clopyralid Pyridine carboxylic acid O 8,181 1,236
Fluroxypyr Pyridine carboxylic acid O 22,742 5,646
Triclopyr Pyridine carboxylic acid O 19,831 5,872
Dicamba Benzoic acid O 1,214 138
All action like indole acetic acid 88,499 51,386
All herbicides 119,504 89,461
Area grown 4,380,288

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 (10)

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