National Honey Bee Survey Pesticide Report

Further sampling summary information can be found at the USDA APHIS National Honey Bee Survey Report page. This report lists the level of detection (LOD) and the prevalence (percentage that the pesticide occurred) in all samples taken across the country as part of pollen sampling since 2011. For example, if the prevalence value for a pesticide is given as “10”, the pesticide was detected in 10% of all samples received. Finally, this table also provides the average and the range in ppb (parts per billion) of pesticides found in all of the samples.

Pesticide samples were collected from stored pollen in brood comb and processed at the USDA Agriculture Marketing Service (USDA-AMS).

United States Department of Agriculture

The Bee Informed Partnership
at beeinformed.org
funded by USDA National Institute of Food and Agriculture


Table: Prevalence of Pesticides found in all samples (n=1078) analyzed for the National Honey Bee disease survey.

Pesticide Detected LOD (ppb) # Samples Prevalence (%) Average Level (ppb) Level Range
1-Naphthol 50.0 1076 0.5 151.9 19.2 - 438.0
2,4 Dimethylaniline 250.0 633 0.3 2245.0 1150.0 - 3340.0
2,4 Dimethylphenyl formamide (DMPF) 5.0 391 44.5 111.7 Trace - 1800.0
4-Hydroxychlorothalonil 10.0 391 0.5 Trace Trace - Trace
Acephate 50.0-100.0 1076 0.5 216.3 Trace - 410.0
Acetamiprid 4.0 1076 0.9 29.9 Trace - 81.0
Acetochlor 15.0 1076 0.5 70.4 16.0 - 103.0
Alachlor 15.0 1054 0.9 72.7 Trace - 131.0
Aldicarb sulfone 15.0 1076 0.1 14.0 14.0
Aldicarb sulfoxide 25.0 1076 0.1 35.9 35.9
Atrazine 4.0 1076 12.5 116.8 Trace - 8600.0
Atrazine CEAT 30.0 191 0.5 Trace Trace*
Atrazine CIAT 30.0 191 1.0 Trace Trace - Trace
Azoxystrobin 5.0 1077 8.7 58.9 Trace - 1870.0
Bendiocarb 10.0 1076 0.1 15.0 15.0
Benoxacor 15.0 1075 0.2 Trace Trace - Trace
Bifenthrin 10.0 1077 4.6 23.1 Trace - 149.0
Boscalid 10.0 1076 6.4 428.2 Trace - 3510.0
Buprofezin 60.0 584 0.2 155.0 155.0
Captan 50.0 990 3.9 590.4 Trace - 5180.0
Carbaryl 2.0 1076 3.1 557.1 Trace - 6600.0
Carbendazim (MBC) 5.0 1076 5.5 68.3 Trace - 780.0
Chlorantraniliprole 15.0 355 3.7 314.6 Trace - 2700.0
Chlorfenvinphos 10.0 778 0.8 53.0 Trace - 75.1
Chlorferone 50.0 777 0.1 192.0 192.0
Chlorothalonil 100.0 847 7.0 637.1 Trace - 4900.0
Chlorpyrifos 5.0 1077 16.1 25.9 Trace - 303.0
Clothianidin 15.0 1076 1.2 28.8 Trace - 62.8
Coumaphos 3.0 1076 31.2 67.4 Trace - 6260.0
Coumaphos oxon 2.0 1076 4.9 19.7 Trace - 180.0
Cyfluthrin 10.0 986 0.7 28.7 Trace - 58.8
Cyhalothrin total 5.0 1058 5.9 12.5 Trace - 110.0
Cypermethrin 10.0 986 0.8 30.8 Trace - 100.0
Cyprodinil 10.0 1076 5.7 269.3 Trace - 5800.0
DDE p,p’ 5.0 583 0.3 Trace Trace - Trace
Diazinon 15.0 1076 0.3 15.2 6.6 - 21.1
Dichlorvos (DDVP) 15.0 1076 0.1 205.0 205.0
Dicloran 5.0 946 0.1 25.0 25.0
Dicofol 5.0 957 0.6 26.0 3.2 - 62.0
Dieldrin 10.0 1023 0.1 12.4 12.4
Difenoconazole 10.0 1026 1.7 75.4 Trace - 150.0
Diflubenzuron 5.0 1076 1.6 70.5 Trace - 252.0
Dimethenamid 10.0 1037 0.2 28.0 24.0 - 32.0
Dimethomorph 25.0 1077 0.2 197.0 Trace - 197.0
Diuron 6.0 191 4.7 22.0 Trace - 59.0
Endosulfan I 10.0 1077 1.3 37.8 Trace - 124.0
Endosulfan II 10.0 1056 1.3 26.1 Trace - 72.5
Endosulfan sulfate 10.0 1077 1.7 14.8 Trace - 56.5
Esfenvalerate 5.0 1077 2.0 12.3 Trace - 52.0
Ethion 15.0 793 1.5 58.9 Trace - 327.0
Ethofumesate 20.0 1076 0.2 9.6 5.0 - 14.2
Etoxazole 5.0 1076 0.2 2.9 Trace - 2.9
Fenbuconazole 15.0 1076 2.6 339.4 Trace - 3470.0
Fenhexamid 30.0 733 0.4 330.9 7.7 - 814.0
Fenoxaprop-ethyl 15.0 1034 0.1 35.6 35.6
Fenpropathrin 10.0 1077 0.6 43.2 20.7 - 93.6
Fenpyroximate 4.0 1076 5.7 36.6 Trace - 290.0
Flonicamid 15.0 1076 0.4 130.1 11.3 - 370.0
Fludioxonil 60.0 1076 0.3 52.5 30.5 - 73.3
Fluopyram 5.0 355 4.5 24.4 Trace - 59.0
Fluoxastrobin 5.0 1076 0.1 Trace Trace*
Fluridone 5.0 1055 0.9 1279.0 Trace - 4220.0
Flutolanil 15.0 728 0.8 42.0 Trace - 109.0
Fluvalinate 5.0 1077 37.4 64.3 Trace - 1930.0
Hexythiazox 15.0 1076 0.5 35.0 Trace - 54.0
Hydroxychlorothalonil 50.0 685 0.1 59.4 59.4
Imidacloprid 6.0 1076 1.9 21.6 Trace - 216.0
Indoxacarb 30.0 1076 0.3 17.0 Trace - 33.0
Iprodione 50.0 703 1.6 153.0 Trace - 503.0
MGK-326 30.0 718 0.3 142.8 95.7 - 190.0
Malathion 10.0 1051 0.4 55.3 Trace - 79.0
Mandipropamide 10.0 191 1.0 Trace Trace - Trace
Metalaxyl 5.0 343 0.6 42.0 Trace - 42.0
Metconazole 10.0 355 0.6 66.0 18.0 - 114.0
Methamidophos 40.0 1076 0.8 19.4 Trace - 45.0
Methomyl 25.0 1076 0.2 19.1 14.7 - 23.6
Methoprene 80.0 322 0.6 5480.0 5090.0 - 5870.0
Methoxyfenozide 5.0 1076 3.3 140.8 Trace - 1300.0
Metolachlor 5.0 788 4.4 170.8 Trace - 2550.0
Metribuzin 5.0 1025 0.3 5.8 Trace - 8.0
Myclobutanil 15.0 1076 1.1 354.5 Trace - 1330.0
Novaluron 30.0 191 1.0 Trace Trace - Trace
Oxyfluorfen 5.0 1058 1.8 8.6 Trace - 21.0
Paradichlorobenzene 250.0 940 3.3 437.2 Trace - 1820.0
Parathion methyl 10.0 1077 0.1 6.6 6.6
Pendimethalin 15.0 1077 7.3 60.8 Trace - 892.0
Permethrin total 25.0 1077 0.4 175.6 20.0 - 421.0
Phenothrin 30.0 843 0.1 40.0 40.0
Phosmet 50.0 1076 1.2 142.3 Trace - 785.0
Piperonyl butoxide 15.0 744 0.9 Trace Trace - Trace
Prallethrin 20.0 1077 1.2 195.7 Trace - 800.0
Propachlor 25.0 1070 0.9 1004.9 Trace - 1690.0
Propazine 10.0 1066 0.1 34.3 34.3
Propham 15.0 1044 0.1 Trace Trace*
Propiconazole 15.0 677 1.9 113.0 Trace - 415.0
Prothioconazole 125.0 191 2.6 220.0 Trace - 220.0
Pyraclostrobin 5.0 1076 7.2 172.4 Trace - 1400.0
Pyridaben 5.0 1076 0.6 16.8 1.2 - 52.6
Pyrimethanil 15.0 1076 2.4 41.5 Trace - 380.0
Pyriproxyfen 5.0 1076 0.7 11.2 Trace - 32.0
Quinoxyfen 15.0 730 0.1 16.0 16.0
Sethoxydim 10.0 1076 0.1 50.2 50.2
Simazine 50.0 1076 0.2 50.0 Trace - 50.0
Spinosad 15.0 1076 0.2 Trace Trace - Trace
Spirodiclofen 5.0 992 0.2 28.0 23.0 - 33.0
Spirotetramat 30.0 191 0.5 40.0 40.0
THPI 15.0 909 2.4 1599.2 Trace - 7060.0
Tebuconazole 5.0-15.0 1076 3.6 87.5 Trace - 811.0
Tebufenozide 5.0 1076 0.2 11.8 1.0 - 22.7
Tebuthiuron 15.0 1076 0.5 4.3 2.2 - 12.1
Tefluthrin 5.0 1077 0.1 Trace Trace*
Thiabendazole 5.0 1076 0.9 5.2 Trace - 26.0
Thiacloprid 5.0 1076 0.4 120.6 29.0 - 326.0
Thiamethoxam 10.0 1076 1.2 13.2 Trace - 39.6
Thymol 50.0 1076 21.5 2316.8 Trace - 55800.0
Tribufos (DEF) 10.0 876 0.2 130.0 Trace - 130.0
Trifloxystrobin 10.0 1005 0.9 244.3 34.1 - 638.0
Trifluralin 5.0 1077 4.6 75.4 Trace - 510.0
Triticonazole 30.0 718 0.6 310.8 135.0 - 483.0
Vinclozolin 5.0 1077 0.3 3.3 Trace - 3.3

*Only a single detection made for this pesticide.

USDA-AMS tests for a broad spectrum of pesticides deemed possible to discover in honey bee colonies. The list of pesticides changes over time as new pesticides are introduced to market, and others are deemed to be unlikely to detect. Below is the list of all pesticides that have been tested for (n = 265), including substances not detected in any samples.

4,4 Dibromobenzophenone,  Acephate,  Carbendazim (MBC),  Chlorferone,  Dieldrin,  Hydroxychlorothalonil,  1-Naphthol,  Acetochlor,  Alachlor,  Aldicarb,  Aldicarb sulfoxide,  Aldrin,  Allethrin,  Amicarbazone,  Atrazine,  Azinphos methyl,  Azoxystrobin,  Bendiocarb,  Benoxacor,  BHC alpha,  Bifenazate,  Boscalid,  Bromuconazole,  Captan,  Carbaryl,  Carbofuran,  Carboxin,  Carfentrazone ethyl,  Chlorfenopyr,  Chlorfenvinphos,  Chlorothalonil,  Chlorpropham (CIPC),  Chlorpyrifos,  Chlorpyrifos methyl,  Clofentezine,  Clothianidin,  Coumaphos,  Cyfluthrin,  Cyhalothrin total,  Cypermethrin,  Cyphenothrin,  Cyprodinil,  Deltamethrin,  Diazinon,  Dichlorvos (DDVP),  Dicloran,  Dicofol,  Difenoconazole,  Diflubenzuron,  Dimethenamid,  Dimethomorph,  Dimethoate,  Dinotefuran,  Endosulfan I,  Endosulfan sulfate,  Endosulfan II,  Endrin,  Epoxiconazole,  Ethion,  Ethofumesate,  Etoxazole,  Etridiazole,  Famoxadone,  Fenamidone,  Fenbuconazole,  Fenhexamid,  DDE p,p’,  Fenpropathrin,  Fenthion,  Fipronil,  Flonicamid,  Fludioxonil,  Fluoxastrobin,  Fluridone,  Flutolanil,  Fluvalinate,  Heptachlor,  Hexachlorobenzene (HCB),  Hexythiazox,  Hydroprene,  Imazalil,  Indoxacarb,  Iprodione,  Lindane,  Linuron,  Fenoxaprop-ethyl,  DDT p,p',  DDD p,p',  Buprofezin,  Amitraz,  Myclobutanil,  Potasan,  Profenofos,  Propanil,  Thymol,  Tebufenozide,  Imidacloprid 5-hydroxy,  Triadimenol,  3-Hydroxycarbofuran,  Norflurazon,  2,4 Dimethylaniline,  Acetamiprid,  Aldicarb sulfone,  Bifenthrin,  Chlorantraniliprole,  Coumaphos oxon,  Diphenamid,  Esfenvalerate,  Fenpyroximate,  Flubendiamide,  Fluopyram,  Heptachlor epoxide,  Imidacloprid,  Piperonyl butoxide,  Imidacloprid olefin,  Malathion,  Metalaxyl,  Metconazole,  Methamidophos,  Methidathion,  Methomyl,  Methoprene,  Methoxyfenozide,  Metolachlor,  Metribuzin,  MGK-264,  MGK-326,  Naled,  Oxamyl,  Oxyfluorfen,  Parathion methyl,  Pendimethalin,  Permethrin total,  Phenothrin,  Phorate,  Phosalone,  Phosmet,  Pirimiphos methyl,  Prallethrin,  Pronamide,  Propachlor,  Propargite,  Propazine,  Propetamphos,  Propham,  Propiconazole,  Pymetrozine,  Pyraclostrobin,  Pyrethrins,  Pyridaben,  Pyrimethanil,  Pyriproxyfen,  Quinoxyfen,  Sethoxydim,  Quintozene (PCNB),  Simazine,  Spinosad,  Spirodiclofen,  Spiromesifen,  Tebuthiuron,  Tebuconazole,  Tefluthrin,  Tetrachlorvinphos,  Tetraconazole,  Tetradifon,  Tetramethrin,  Thiabendazole,  Thiacloprid,  Thiamethoxam,  THPI,  Triadimefon,  Tribufos (DEF),  Trifloxystrobin,  Triflumizole,  Trifluralin,  Triticonazole,  Vinclozolin,  Paradichlorobenzene,  Resmethrin total,  4-Hydroxychlorothalonil,  Tolfenpyrad,  Sulfoxaflor,  Spirotetramat,  Spinetoram,  Prothioconazole,  Prodiamine,  Phosmet OA,  Parathion ethyl,  Omethoate,  Bromacil,  Novaluron,  Norflurazon desmethyl,  Methiocarb,  Mandipropamide,  Hexazinone,  Kresoxim-methyl,  Flupyradifurone,  Fluometuron,  Fipronil sulfone,  Fipronil sulfide,  Abamectin,  Atrazine CEAT,  Atrazine CIAT,  Benfluralin,  Cyazofamid,  Cyantraniliprole,  Fenazaquin,  Fenarimol,  Etofenprox,  Ethalfluralin,  Emamectin Benzoate,  Diuron,  Diclofop-methyl,  Diazinon oxon,  DDT o,p',  Cyromazine,  4-Aminopyridine,  2,4 Dimethylphenyl formamide (DMPF),  Mesotrione,  Metalaxyl Total,  Formetanate,  DDE p,p',  Cypermethrin total,  Cyfluthrin total,  Tribufos,  Triazophos,  Resmethrin, trans,  Resmethrin, cis,  Quintozene,  Propamocarb hydrochloride,  Prometryn,  Prometon,  Picoxystrobin,  Phosmet oxon,  Permethrin,  Penthiopyrad,  Penconazole,  Momfluorothrin,  Fluxapyroxad,  Flutriafol,  Esfenvalerate/Fenvalerate,  Cymiazole,  Cyhalothrin,  Cyflumetofen,  Cyflufenamid,  Chlorthal-dimethyl (DCPA),  Chlorpropham,  Carbendazim,  Bentazon,  Azinphos-methyl,  Ametoctradin,  2,6-Dichlorobenzamide (BAM),  DDE, p,p',  Fluopicolide,  Fenoxaprop-p-ethyl,  Diphenylamine,  DEET,  Cymoxanil,  Chlorfenapyr,  Carfentrazone-ethyl,  Bromopropylate,  Bensulide,  Avermectin,  Acrinathrin,  DDE p,p,