This article doesn't speak directly to food, but it certainly speaks to the mindset we're up against. And not just on school grounds. On farm lands, golf courses, your neighborhood???, etc.

Marc Lane, an entomologist and professor at Indiana University’s School of Public and Environmental Affairs ... says that pesticides in schools are a “pervasive, unnecessary health hazard”. He goes on to point out that “Over 80 percent of schools in America are applying pesticides on a regular basis, whether they have a pest problem or not," he said. "This is tragic not only because of the well-documented link between pesticides and health problems in children, such as asthma and neurological disorders, but also because pesticides generally do not work in a preventive manner in the school environment. Applying pesticides does not prevent pests from coming in, so using them when pests are not present does nothing other than expose children and staff to toxic chemicals."

When in doubt, spray it. And spray the absolute sh*t mess out of it.