U.S.-backed pesticide spraying in Guatemala draws fire

For most of three decades, the U.S. has financed massive aerial spraying of pesticides over a large part of Guatemala in an attempt to eradicate the Mediterranean fruit fly, but common precautions to limit exposure to the toxic chemicals are not being followed.
In the 1980s and 1990s, malathion was sprayed from aircraft over thousands of acres of Guatemala's forests and farmlands. More recently the U.S.-financed program has been spraying Spinosad GF 120 Naturalyte Fruit Fly Bait, produced by Dow Agrosciences.

According to Guatemalan government data, the U.S.-backed program has applied more than 6 million liters of GF-120 since 2002, equivalent to more than 5,000 tons of this pesticide-bait.

Dow scientists say that Spinosad is highly toxic to beneficial insects and aquatic species, and that precautions should be taken to avoid daytime spraying and avoid bodies of water.

However, in Guatemala, spraying occurs during the day and over water. In contrast, in California, which is also waging an ongoing battle with medflies, the use of Spinosad sprays to control the pests is carefully regulated, and residents and farm workers are warned prior to spraying to keep out of sprayed zones for at least four hours.
This is not the case in Guatemala.

The U.S. has spent $266 million on the fruit-fly eradication program since 1976. The original purpose of the program was to create a barrier that would keep the Medfly from "migrating" to California fruit farms about 2,200 miles away.

But the characterization of the medfly as a destructive "illegal alien" is challenged by Dr. James Carey, an entomologist with the University of California, Berkeley, who has concluded from DNA tests that the medfly is a permanent resident of California, detected in 167 municipalities --one third of the state -- since 1975.

Carey is recognized as a pre-eminent expert on the medfly, who served on the California Department of Food and Agriculture´s Medfly Scientific Advisory Panel from 1987 to 1994.

Campesinos, beekeepers, environmentalists, coffee growers and others who work the land and study it have opposed the program for years.

Israel Gramajo, the mayor of San Antonio, Suchitepequez, in southern Guatemala, is currently leading an effort to remove a Mosca Del Mediterraneo (or MOSCAMED) quarantine post from his town and prohibit aerial spraying. The medfly larvae develop in fruit such as coffee berries, oranges and mangos. The quarantine posts are set up on highways to keep potentially contaminated fruit from entering into regions considered free of the medfly. Ironically, the quarantine in San Antonio has been designed to keep contaminated fruit from entering a region already infested by the fruit fly.

Guatemala is the only Central American country using massive aerial spraying of pesticides to control the medfly. According to medfly program protocol, the plane sprays up to seven times each area treated, for a total of 500 droplets per 10 square feet.

According to a 2009 medfly report by a Mexican scientist working with the MOSCAMED Program, 1,650 square miles were infested with the Medfly in Guatemala, and another 5,600 square miles were subject to "suppression".

Guatemalans complain of damages to their crops, along with allergic reactions and conjunctivitis. MOSCAMED authorities deny the charges and say they provide important support to beekeepers, along with baking classes and medical campaigns in towns where the program is active.

When scientific studies in the 1980s and 1990s began raising concern regarding the potential environmental and human risks from massive aerial spraying of malathion, the MOSCAMED program sought out alternative pesticides, and began using GF-120. In 2002 the Guatemalan government requested an environmental impact study, to assure that the spraying is benign.

But that study, approved by the Guatemalan Ministry of Environment and Natural Resources in 2005, heavily relied on data from Dow Agrosciences and the U.S. and Guatemala agencies involved in the MOSCAMED program.