According to a marijuana eradication task force in Fresno County, officials has identified over 500 illegal marijuana plantations growing in the Sequoia National Forest and Kings Canyon in Central California in the first 10 months of 2013. Security officials seized nearly 2,400 marijuana plants, over double the number of plants seized in all of 2012.
Environmental and wildlife officials are concerned about the use of pesticides by the marijuana growers. Using a poison called second generation anticoagulant rodenticide (SGAR), the growers use the chemical to keep wild animals from eating their marijuana plants. A quarter teaspoon of the pesticide has enough poison to kill a 500 pond lion, yet marijuana farmers are using up to 50 times that amount on their plants. Officials has found two endangered spotted owls that have been exposed to the chemical, along with 6 endangered Pacific Fisher mammals who have died consuming the pesticide.
Source: Elyce Kirchner, Julie Putnam, and Jeremy Carroll, “Poisoned Parks: Illegal Marijuana Growers Leave National Parks Trashed, Animals Dead,” NBC Bay Area, November 1, 2013.