Recently a number of respected newspapers have put forth the opinion that the soil fumigant methyl iodide, which has received a registration from the Department of Pesticide Regulation (DPR) as a restricted material in California, may be “legal, but not worth it.”
These opinions and articles questioned why such a “toxic” material would be approved for use in spite of objections raised by a group of 52 scientists as well as some in the environmental and anti-pesticide community.
With such an emotional issue, it is vitally important that the public understand the rationale behind such a decision and why DPR took about three years coming to a conclusion.
First, in regard to the question of why do we have soil fumigants at all we need look no further than a University of California-Davis analysis requested by the California Department of Food and Agriculture.
The analysis states that without fumigants, the negative economic impact in this state would be about $1.58 billion, accompanied by the loss of over 23,000 jobs.
Fumigants are a vital tool to rid the soil of pathogens and disease that rob yields. Without them most consumers would not be able to buy food at affordable levels. And while every grower I know would love to be sustainably growing food without chemical inputs, the reality is that most consumers demand price levels that are not compatible with organic production.
Second, as to why methyl iodide, the answer is understandable when looking at the requirements of the Montreal Protocol, which is phasing out methyl bromide because of its ozone depleting characteristics.
Methyl iodide does not harm the earth’s ozone layer. In addition, methyl iodide is already registered in 47 other states and has been used to treat more than 17,000 acres of farmland without incident.
The product is also registered and used in a number of other countries.
These same growers compete against California farmers for market share, and without a level playing field, producers here are put at an extreme disadvantage that will eventually lead to outsourcing our food production not only out of state but out of country as well.
Third, why register this product if it is so “toxic”?
Department of Pesticide Regulation director Mary-Ann Warmerdam stated that “methyl iodide is the most evaluated pesticide in the department’s history. Methyl iodide can be used safely under our tough restrictions by only highly trained applicators at times, places and specific conditions approved by the county agricultural commissioners.”