The government is censoring its own scientists for studying ties between pesticides and bee deaths?

Following reports that scientists at the United States Department of Agriculture are being harassed and their research on bee-killing pesticides is being censored or suppressed, a broad coalition of farmers, environmentalists, fisheries and food-safety organizations urged an investigation in a May 5 letter sent to Phyllis K. Fong, USDA Inspector General.

The signatories include the American Bird Conservancy, Avaaz, Center for Biological Diversity, Center for Food Safety, Farmworkers Association of Florida, Food and Water Watch, Friends of the Earth, Green America, Organic Consumers Association and Sierra Club.

The research in question centers on neonicotinoids, a nicotine-like class of insecticides that impair the neurological systems of insects and which studies have linked to die-offs of bees and monarch butterflies—two key pollinators—as well as birds. Neonicotinoids have been strongly linked to honey-bee colony collapse disorder (CCD), a syndrome first observed in Germany that has been blamed for massive bee population declines across the globe. In 2013, certain neonicotinoids were banned by the European Union and a few non-EU nations.

The global food system relies on bees to pollinate at least 30 percent of the world’s crops. Bees are responsible for pollinating a host of American crops, from apples and almonds to cantaloupes and cucumbers, impacting $15 billion a year in U.S. crops.

In March, Public Employees for Environmental Responsibility (PEER), an environmental activist group supporting local, state and federal researchers, filed a legal petition with the USDA seeking new rules meant to increase the job protection for government scientists and citing censorship and harassment. At least 10 USDA scientists have come under fire for research into farm chemical safety that conflicts with the interests of the agribusiness sector, according to PEER executive director Jeff Ruch.

In April 2014, the group released “Follow the Honey: 7 ways pesticide companies are spinning the bee crisis to protect profits,” a report documenting the deceptive tactics used by agrochemical companies to deflect blame from their chemicals to pollinator declines and stall governmental regulation on neonicotinoids. The companies named in the report include U.S.-based Monsanto, Switzerland-based Syngenta and Germany-based Bayer, which patented the first commercial neonicotinoid, Imidacloprid, the world’s most widely used insecticide.