Signal Words CAUTION “Caution”reflects the lowest degree of relative toxicity All pesticides with an LDs0 of greater than 500 mg/kg must display this word on their label
Signal Words CAUTION “Caution” reflects the lowest degree of relative toxicity All pesticides with an LD50 of greater than 500 mg/kg must display this word on their label
POISON!!! Legally defined term not just anything you don't like Any pesticide with an LDso of 50 mg/kg or less Labels must reflect this classification Label must have the signal word“DANGER”plus the word "POISON” Label also must display the skull and crossbones icon Mistretta USFS R-8
POISON!!! • Legally defined term – not just anything you don’t like • Any pesticide with an LD50 of 50 mg/kg or less • Labels must reflect this classification • Label must have the signal word “DANGER” plus the word “POISON” • Label also must display the skull and crossbones icon Mistretta USFS R-8
Toxicities of Forest Pesticides Acute oral Trade Name LDs0 Category Signal Word mg/kg AAtrex 4L 1075 Ⅲ Caution Accord >5000 IV Caution Arsenal >5000 V Caution Garlon 4 1338 IⅢ Caution Tordon 2598 I Caution Velpar L 6887 V Caution
Toxicities of Forest Pesticides Trade Name Acute oral LD50 mg/kg Category Signal Word AAtrex 4L 1075 III Caution Accord >5000 IV Caution Arsenal >5000 IV Caution Garlon 4 1338 III Caution Tordon 2598 III Caution Velpar L 6887 IV Caution
Pesticide Toxicity Toxicity decreases when mixed (diluted) with water 1 gallon of pesticide in 1 gallon of water is 50%less toxic 1 gallon of pesticide in 20 gallons of water is 95%less toxic
Pesticide Toxicity • Toxicity decreases when mixed (diluted) with water • 1 gallon of pesticide in 1 gallon of water is 50% less toxic • 1 gallon of pesticide in 20 gallons of water is 95% less toxic