Pesticide chemical levels in the nectar depended on the crop, Jones said. While nectar of cotton and citrus fruits were above the harmful concentrations, the levels were not harmful for corn — the nation's top crop by far — most vegetables, berries and tobacco. Other crops weren't conclusive and need more testing, including legumes, melons, tree nuts and herbs. The problem crops of cotton and citrus are No. 7 and 9 in U.S. production value in 2014, according to Agriculture Dept. statistics.
read more