Contributors: T.E. Bilderback, Extension Horticulture Specialist; A.H. Bruneau, Extension Crop Science Specialist; S.C. Hodges, Extension Soil Science Specialist; L.T. Lucas, Extension Plant Pathology Specialist; W.A. Skroch, Professor Emeritus; S.L. Warren, Associate Professor, Horticulture Science


Pesticide Storage and Disposal

Damages caused by improperly stored or disposed of pesticides may expose the violator to liability.

Proper planning and equipment calibration are good ways to reduce the amount of pesticides left over after applications. One option for disposing of leftover chemicals is to spray the excess on another site which is considered safe according to the requirements on the label. Another is to take them to an approved landfill. There are also companies whose business is to correctly dispose of pesticides. Faulty or improperly managed storage facilities may result in direct runoff or leaching of pesticides into surface and groundwaters. A good storage facility should possess the following features:

Additional information regarding pesticide storage and disposal is available through the NCDA-Pesticide Section, (919) 733-3556, the NCDA Pesticide Disposal Specialist, (919) 733-7366, or your county Cooperative Extension Center.

Best Management Practices for Pesticide Storage and Disposal

Best Management Practices for Pesticide Spills

Unmanaged spills may quickly move into surface waters and cause injury to plants and animals. It is essential that you be prepared for major or minor spills.

Call Chemtrec, a 24-hour emergency service regarding spill management, for specific instructions on site neutralization. (1-800-424-9300).

Table 2. Fungicide Leaching Potential (PLP) Ratings

Common Name Trade Name RATE (lbs/AI/Acre1 ) PLP Index 2 PLP Rating 3
Anilazine Dyrene 5.40 21 very low
Benomyl -- -2.70 45 low
Chloroneb Terraneb 7.00 50 low
Chlorothalonil Daconil 19.60 48 low
Etridiazole Koban 6.50 41 low
Fenarimol Rubigan 2.00 55 moderate
Flutoanil Prostar 4.00 -- --
Fosetyl-AL Aliette 17.40 38 low
Iprodione Chipco 2.50 35 low
Mancozeb Fore 8.70 46 low
Maneb Tersan LSR 13.00 49 low
Metalaxyl Subdue 1.36 53 moderate
Propiconazole Banner 1.50 42 low
Propoxur Baygon 8.10 20.25 very high
Propamocarb Banol 7.24 0.35 moderate
Thiophanate Clearys-methyl 3336 2.70 28 very low
Triadimefon Bayleton 1.30 40 low
Vinclozolin Curlan 2.70 21 very low

1 Pounds of active ingredient per acre

2 PLP Index = (T 1/2) x (Application Rate) x (Fraction of pesticide reaching soil (0.5 for turf))/Koc

3 PLP Rating based on PLP value where very low = <30, low = 31-50, moderate = 51-75, high = 76-100.

Table 3. Insecticide Leaching Potential (PLP) Ratings

Common Name Trade Name RATE (lbs/AI/Acre 1 ) PLP Index 2 PLP Rating 3
Acephate Orthene 3.00 60 moderate
Bendiocarb Turcam 4.10 40 low
Carbaryl Sevimol 2.10 37 low
Chlorpyrifos Dursban 1.00 21 very low
Cyfluthrin Tempo 0.09 1 very low
Diazinon Diazionon 4.30 43 low
Ethoprop Mocap 4.90 57 moderate
Fonofos Crusade 3.90 42 low
Isazofos Triumph 2.00 50 low
Isofenphos Oftanol 1.90 46 low
Methomyl Lannate 1.90 51 moderate
Propoxur Baygon 8.10 71 moderate
Trichlorfon Proxol 8.16 67 moderate

1 Pounds of active ingredient per acre

2 PLP Index = (T 1/2) x (Application Rate) x (Fraction of pesticide reaching soil (0.5 for turf))/Koc

3 PLP Rating based on PLP value where very low = <30, low = 31-50, moderate = 51-75, high = 76-100.

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Last Modified: 07/10/96