The Memorandum of Understanding identifies four categories of pesticides subject to use and risk reduction goals –

• Acutely toxic pesticides falling within the WHO classifications "1a -- Extremely Hazardous" and class "1b – Highly Hazardous." (Current classifications from the report "The WHO Recommended Classification of Pesticides by Hazard and Guidelines to Classification 1996-1997," International Programme on Chemical Safety).  

• Class A or B/2 carcinogens under EPA's cancer classification system  

• known endocrine disruptors, as identified by World Wildlife Fund scientist Dr. Theo Colborn  

• pesticides adversely effecting non-target organisms and wildlife  

The addendum to the WWF-WPVGA "Memorandum of Understanding" sets forth a series of representative, preliminary goals, including --  

• 15 percent reduction in the pounds applied in crop year 1997, compared to the 1995 baseline;  

• 30 percent reductions in pounds applied within five years (crop year 2001); and,  

• elimination of use, or certification that there are no detectable residues in harvested foodstuffs nor damage to non-target organisms through appropriate residue testing and field research efforts.

Given the relatively low acute and non-target toxicity of several major fungicides, and the lack of residues in food, it is expected that use patterns will be developed that allow some continued use of fungicides, especially in years when new strains of blight or other diseases emerge.  

The following preliminary lists cover all pesticides used in U.S. potato production in 1995, according to the USDA cropping practices survey. Pesticides followed by a parenthesis were used in Wisconsin in 1995; the percentage shown is acres treated in Wisconsin in 1995.  

Acute Tox Ones	Carcinogens	Endo Disruptor	Non-Target Impacts
Disulfoton (4.3%)	Maneb (13%)	Maneb (13%)	Metam-sodium
Methyl parathion (?)	Mancozeb (85%)	Mancozeb (85%)	? Permethrin (36%)
Mevinphos	Chlorothalonil (77%)	Endosulfan (54%)	Dichloropropene
Phorate (7.2%)	Iprodione	Aldicarb
Phosphamidon	Propargite	Permethrin (36%)
Azinphos-methyl (8%)	Triphenyltin hydrox. (48%)	Methomyl (<1%)
Carbofuran (11.6%)		Metribuzin (85%)
Methamidophos (57%)		Methoxychlor
Methomyl (<1%)		Triphenyltin hydrox. (48%)
Ethroprop (4.3%)		Metiram
Ethyl parathion		Carbaryl
Fonofos		Carbaryl
Oxamyl
Alicarb
Mevinphos

---