Remember For pesticides-less is more when dealing with toxicity The less you need to cause a toxic effect the more toxic the substance is Thus an LDs0 of 25 mg/kg is more toxic than is one of 7,000 mg/kg Mistretta USFS R-8 Remember – • For pesticides – less is more when dealing with toxicity • The less you need to cause a toxic effect – the more toxic the substance is • Thus an LD50 of 25 mg/kg is more toxic than is one of 7,000 mg/kg Mistretta USFS R-8