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Pesticide Use in San Mateo in 2009, Bay Area Region

Note: See Working with the Information on this Page section below for important notes about this data.
County Information
 Basic Information about this county including contact information for the California County Agricultural Commissioner in this county.
Top Pesticides
 Top 50 pesticides used in this county or region in 2009, with information on the identity, use type and toxicity of each pesticide, as well as gross pounds used, application rate, acres planted, and number of applications.
Top Crops/Sites
 Top crops and sites for chemical use in this county or region in 2009, with information on gross pounds used, application rate, acres planted, and number of applications.

Basic County Information for San Mateo

Agricultural Commissioner Contact Information
Click below for detailed map of
San Mateo
Gail M. Raabe
728 Heller Street
Redwood City, CA 94064
send mail to:
P.O. Box 999
Redwood City, CA 94064-0999
Phone:650-363-4700
Fax: 650-367-0130
Email: SMateoAg@cdfa.ca.gov
Web: http://www.co.sanmateo.ca.us/agriculture/index.htm

For more detailed county agricultural contact information, see the CDFA County Ag Liaison Office.

Top 50 Pesticides Used on All Sites in San Mateo in 2009


Totals for 2003 and later may be under-reported due to omission of adjuvants in DPR's data since that time.
Chemical Name
(CA Chem Code)
 Chemical Class PAN Bad Actor Gross
Pounds		 Application Rate
Pounds per acre treated
 Acres Planted
where all or part
has been sprayed
 Acres Treated
All Chemicals (00)
 Not Listed 241,595 2.85 3,855 33,600
Uses:
Metam potassium (970)
 Dithiocarbamate Yes 43,432 104.7 599.2 415.0
Uses: Fumigant, Fungicide, Microbiocide, Algaecide, Nematicide
Sulfuryl fluoride (618)
 Inorganic Yes 35,797 - - -
Uses: Fumigant
Metam-sodium (616)
 Dithiocarbamate Yes 24,790 85.4 320.0 284.0
Uses: Fumigant, Herbicide, Fungicide, Microbiocide, Algaecide
Petroleum distillates, refined (2106)
 Petroleum derivative Not Listed 17,473 8.96 42.2 36.3
Uses: Insecticide
Mineral oil (401, 2687, 473)
 Petroleum derivative Yes 16,122 6.83 71.2 157.2
Note! Data for Mineral oil summarizes data from 2 or more chem codes and may not agree with DPR summaries which total data for each chem code.
Uses: Insecticide, Adjuvant
Glyphosate, isopropylamine salt (1855)
 Phosphonoglycine Not Listed 15,504 4.59 329.9 226.2
Uses: Herbicide
Potassium phosphite (5766)
 Inorganic Not Listed 11,109 2.10 13.5 15.9
Uses: Fungicide
Chlorothalonil (677)
 Substituted Benzene Yes 5,452 1.73 1,242 1,878
Uses: Fungicide
PCNB (464)
 Substituted Benzene Not Listed 5,014 19.9 361.2 220.7
Uses: Fungicide, Nematicide, Algaecide
Disodium octaborate tetrahydrate (1800)
 Inorganic Not Listed 4,990 - - -
Uses: Insecticide, Herbicide
Triclopyr, butoxyethyl ester (2170)
 Chloropyridinyl, Glycol Ether Not Listed 3,864 0.24 45.1 33.5
Uses: Herbicide
Limonene (979, 2531)
 Oil - essential Not Listed 3,388 - - -
Note! Data for Limonene summarizes data from 2 or more chem codes and may not agree with DPR summaries which total data for each chem code.
Uses: Insect Repellent, Insecticide, Dog and Cat Repellent
Petroleum oil, unclassified (765)
 Petroleum derivative Not Listed 3,387 17.1 7.00 13.2
Uses: Insecticide, Herbicide, Fungicide, Adjuvant
Calcium hypochlorite (326)
 Inorganic Yes 2,612 - - -
Uses: Algaecide, Water Treatment
Trichloro-s-triazinetrione (407)
 Triazinetrione Yes 2,581 - - -
Uses: Microbiocide, Water Treatment
1,3-Dichloropropene (573)
 Halogenated organic Yes 2,481 118.1 95.0 21.0
Uses: Fumigant, Nematicide
Free fatty acids and/or amine salts (1198)
 Fatty acid, Soap Not Listed 1,987 - - -
Uses: Herbicide, Deer Repellent, Fungicide, Insecticide
Mancozeb (211)
 Dithiocarbamate, Inorganic-Zinc Yes 1,731 1.82 310.8 478.4
Uses: Fungicide
Diquat dibromide (229)
 Bipyridylium Yes 1,640 5.59 201.0 125.7
Uses: Herbicide, Dessicant
Sodium dichloro-s-triazinetrione dihydrate (1818)
 Triazinetrione Yes 1,541 - - -
Uses: Microbiocide, Water Treatment
Imazapyr, isopropylamine salt (2257)
 Imidazolinone Not Listed 1,495 1.92 - 4.00
Uses: Herbicide
Thiophanate-methyl (1696)
 Benzimidazole precursor Yes 1,494 1.75 320.2 153.6
Uses: Fungicide
Fosetyl-Al (2210)
 Unclassified Yes 1,430 4.46 163.8 198.4
Uses: Fungicide
Pendimethalin (1929)
 2,6-Dinitroaniline Not Listed 1,194 1.09 63.5 8.26
Uses: Herbicide
Boric acid (769)
 Inorganic Not Listed 1,062 - - -
Uses: Insecticide
Lecithin (3264)
 Botanical Not Listed 1,021 0.26 563.0 894.0
Uses: Fungicide
Chlorpyrifos (253)
 Organophosphorus Yes 961.1 0.94 884.8 987.3
Uses: Insecticide, Nematicide
Permethrin (2008)
 Pyrethroid Yes 952.0 0.12 202.0 114.0
Uses: Insecticide
Sulfur (560)
 Inorganic Not Listed 943.4 3.25 376.8 288.8
Uses: Fungicide, Insecticide
Malathion (367)
 Organophosphorus Yes 900.3 1.62 651.5 548.4
Uses: Insecticide
Acephate (1685)
 Organophosphorus Yes 852.3 2.00 274.8 284.5
Uses: Insecticide
Terrazole (580)
 Azole Yes 797.6 2.44 179.0 309.8
Uses: Fungicide
Daminozide (7)
 Unclassified Yes 779.1 5.67 77.5 37.8
Uses: Plant Growth Regulator
Cypermethrin (2171)
 Pyrethroid Not Listed 764.6 0.04 14.0 8.00
Uses: Insecticide
Oryzalin (1868)
 2,6-Dinitroaniline Yes 696.6 12.8 3.00 1.25
Uses: Herbicide
Glyphosate, potassium salt (5820)
 Phosphonoglycine Not Listed 622.6 3.34 360.0 184.0
Uses: Herbicide
Lime-sulfur (358)
 Inorganic Not Listed 617.5 16.7 24.6 33.7
Uses: Insecticide, Fungicide
Metaldehyde (379)
 Aldehyde Not Listed 610.2 1.23 431.2 291.4
Uses: Molluscicide
Nonyl phenoxy poly (ethylene oxy) ethanol (1743, 1397, 3999, 5755)
 Polyalkyloxy Compound Not Listed 561.8 0.07 712.7 991.0
Note! Data for Nonyl phenoxy poly (ethylene oxy) ethanol summarizes data from 2 or more chem codes and may not agree with DPR summaries which total data for each chem code.
Uses: Adjuvant, Plant Growth Regulator, Adjuvant, Soap/Surfactant
Glyphosate, monoammonium salt (2301, 2319)
 Phosphonoglycine Not Listed 552.2 3.78 - 0.40
Note! Data for Glyphosate, monoammonium salt summarizes data from 2 or more chem codes and may not agree with DPR summaries which total data for each chem code.
Uses: Herbicide
Nonanoic acid (2739)
 Fatty acid Not Listed 544.0 4.72 63.5 113.6
Uses: Herbicide, Fungicide
Poly(oxyethylene) (dimethylimino) ethylene (dimethylimino) ethylene dichloride (1576)
 Unclassified Not Listed 538.9 2.60 - 5.00
Uses: Microbiocide
Iprodione (2081)
 Dicarboximide Yes 463.8 1.03 243.3 125.7
Uses: Fungicide
Copper (714)
 Inorganic-Copper Not Listed 449.7 - - -
Uses: Fungicide
Undecyl polyoxyethylene (5 moles ethylene oxide) (3929)
 Polyalkyloxy Compound Not Listed 447.7 0.17 212.0 115.7
Uses: Adjuvant
Oxydemeton-methyl (382)
 Organophosphorus Yes 440.3 1.04 516.0 422.7
Uses: Insecticide
Dimethoate (216)
 Organophosphorus Yes 431.1 0.61 526.5 705.0
Uses: Insecticide
Imidacloprid (3849)
 Neonicotinoid Not Listed 421.1 0.07 1,204 1,784
Uses: Insecticide
Copper hydroxide (151)
 Inorganic-Copper Not Listed 407.4 0.75 249.5 268.5
Uses: Fungicide, Microbiocide, Nematicide

Top 50 Crops and Sites for for All Chemicals use in San Mateo in 2009
Crop or Site
(Commodity Code)
 Gross
Pounds		 Application Rate
pounds per acre treated
 Acres Planted
where all or part
has been sprayed
 Acres Treated Application
Count
All Sites (00)
241,595 2.85 3,855 33,600 21,566
Brussel Sprouts (13006)
72,146 4.04 900.5 17,870 1,148
Landscape (30)
52,512 - - - 4,096
Structural Pest Control (10)
47,969 - - - 6,754
Public Health Pest Control (50)
29,990 - - - 159
Right of Way (40)
12,172 - - - 393
Leeks (14010)
8,356 9.95 149.2 839.4 123
Greenhouse Plants (153)
5,466 1.02 64.0 3,544 5,036
Outdoor Container Nursery (154)
3,564 1.40 221.5 1,944 1,041
Wine Grapes (29143)
1,138 0.57 86.7 2,005 272
Outdoor Flower Nursery (152)
1,121 0.78 352.2 1,359 348
Greenhouse Flowers (151)
953.2 1.14 8.00 624.8 1,022
Strawberries (1016)
901.0 4.84 17.0 186.0 31
Blackberries (1002)
801.4 8.35 15.0 96.0 9
Ornamental Turf (33008)
649.0 2.91 21.1 223.0 25
Aquatic Area (65000)
634.8 4.94 - 128.5 9
Uncultivated Agricultural Area (66000)
592.2 0.42 336.0 1,410 123
Succulent Beans (15003)
370.9 0.42 174.0 882.9 171
Greenhouse Propagation (155)
293.2 1.43 - 0.60 333
Beans (28001)
280.1 0.62 94.0 452.0 80
Aquatic Industrial Uses (65503)
277.4 4.65 - 53.7 19
Pears (4003)
236.4 6.16 4.00 38.4 23
Apples (4001)
205.6 6.35 3.00 32.4 22
Pasture (28035)
196.0 0.56 1,040 352.5 21
Fennel (28008)
157.5 4.15 3.00 38.0 16
Peas (29127)
154.5 0.37 83.0 419.0 65
Artichokes (13018)
117.1 0.15 72.0 769.0 58
Bean, Broad (Fava, Horse Bean) (28059)
53.0 0.33 24.0 159.0 21
Peaches (5004)
51.5 4.91 1.00 10.5 11
Uncultivated Non-Agricultural Area (67000)
36.7 2.44 3.00 15.0 6
Spices (8000)
35.0 1.39 104.0 25.2 25
Vertebrate Pest Control (80)
34.6 - - - 40
Apricots (5001)
33.5 7.44 1.50 4.50 5
Cherries (5002)
26.9 4.90 4.50 5.50 7
Cauliflower (13008)
15.7 3.92 12.0 4.00 2
Quince (4004)
11.4 2.75 0.33 4.17 11
Oats for Forage (22006)
10.9 0.36 30.0 30.0 1
Plums (5005)
8.52 5.01 1.00 1.70 8
Parsley (13022)
5.88 2.53 1.74 2.32 4
Potatoes (14013)
4.90 17.5 1.00 0.28 1
Swiss Chard (13025)
4.12 0.13 9.00 32.0 16
Pumpkins (10011)
3.18 0.14 11.0 22.0 2
Celery (29113)
2.20 0.16 6.00 14.0 7
Nectarines (5003)
1.53 6.14 0.25 0.25 1
Regulatory (100)
0.02 - - - 1
 
Working with the Information on this Page

* Complete 2001 data for Kern county was never submitted by the Kern County Agricultural Commissioners office. This missing data includes approximately 32,000 records totaling roughly 10 million pounds. An omission of this scale will significantly impact statewide trends.

** The 2005 data for Ventura county is incomplete because not all of the data was available at the time of DPR's release. Missing data includes mostly applications made in November and December. An estimate based on reported use in Ventura County during November and December from 2002 to 2004 suggests that the 2005 total pounds is underreported by approximately 500,000 pounds. The active ingredients most affected are captan and petroleum oil. See the DPR's 2005 PUR report for additional details.

NOTE! See methodology and documentation for California Pesticide Use Reporting for important qualifications on these numbers.

Click on the commodities name links for special caveats on the data for each commodity. For more detailed use information, including data for other years, search our California Pesticide Use database. Original source for all pesticide use data is the California Pesticide Use Report (PUR) dataset, collected and managed by the California Department of Pesticide Regulation. Significant processing of the original dataset is required to generate the summary data presented here; see documentation for a full discussion of data handling.

NOTE! Comments on the accuracy of Acres Planted reflect PAN's analysis of acreage data from the California Agricultural Statistics Service (CASS) and Department of Pesticide Regulation Pesticide Use Reporting data. The method used to assess acreage accuracy is described in the documentation. Accuracy was evaluated for aggregate, statewide California acreage, but not for smaller regions (e.g., counties). See CASS acreage estimates for additional information.

Click on underlined terms for definitions or go to the Pesticide Tutorial overview page.

Any underlined term with a book icon has additional information.

To print this page, choose Print. To export this data, choose Save As 'HTML Source' and open it in Excel or equivalent program.

Definitions
  • Acres Planted is the planted acreage of the crop in the selected region where the selected chemical was applied. This figure may not be the total acreage of the selected crop. To obtain the total planted acreage for a crop or county, see the crop and county pages available from the Pesticide Use Search Page. See documentation for important distinctions between acres treated and acres planted.
  • Acres Treated is the acreage of the crop actually treated with the pesticide. Gross Pounds applied divided by Acres Treated is the application rate of the pesticide. The difference between Acres Planted and Acres Treated is best explained through an example:If a farmer has a 100-acre field and sprays 50 acres, then the Acres Planted will be 100 and the Acres Treated will be 50. If a farmer sprays 50 of their 100 acres three times, then the Acres Planted will remain at 100 acres, but now the value of Acres Treated will be 150. This figure may not be the total acreage of the selected crop. See documentation for further distinctions between acres treated and acres planted.
  • Application Count indicates the number of times this chemical was applied.
  • Application Rate indicates the total pounds applied to acreage divided by the total treated acres. Only pounds applied to acreage are used to calculate the application rate. This excludes pesticides used to fumigate stored commodities or other non-cropland applications. See documentation for important distinctions between acres treated and acres planted.
  • Chemical Class indicates the chemical classification of this chemical.
  • Chemical Code is the California Department of Pesticide Regulation code number assigned as an identifier for each chemical.
  • Chemical Uses indicates the major uses for this chemical, with the most common use listed first.
  • County Code is a code number that various California State agencies use to identify each California county. There are 58 total counties.
  • Field Count is the number of fields where this chemical was applied.
  • Gross Pounds indicates the total pounds used, including both pounds used on acreage and pounds used in other applications such as commodity fumigation.
  • PAN Bad Actor indicates whether this chemical belongs to the group of most toxic pesticides or not. See link for a full definition of this term.
 
Citation: Kegley, S.E., Hill, B.R., Orme S., Choi A.H., PAN Pesticide Database, Pesticide Action Network, North America (San Francisco, CA, 2010), http:www.pesticideinfo.org.
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