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Pearl Millet Wins Approval From Honey Bees and Other Pollinators Contact: Jessica Ryan Email: Jessica.Ryan@usda.gov June 18, 2024 Pearl millet, an annual grass used for grain and forage, can be a good food source for honey bees and hover flies, according to a recent study. The United States Department of Agriculture (USDA)’s Agricultural Research Service (ARS) and University of Georgia College of Agricultural and Environmental Sciences researchers studied the impact of pearl millet as a source of insect food by surveying insects collecting and consuming the sucrose-rich pollen of this crop. Researchers planted Tift Long-Headed Bulk, a type of pearl millet known for its long candlestick-like heads, at a research farm in Tifton, Georgia, during the past summer. According to the survey results, the most common insects observed feeding on Tift Long-Headed Bulk pearl millet were honey bees followed by lined earwigs, and maize calligrapher hover flies. Other pollinators such as two-spotted longhorn bees, common eastern bumble bees, American bumble bees, sweat bees, and two other species of hover flies also feasted on the crop. Tift long-headed bulk pearl millet.Tift Long-Headed Bulk growing in Tifton, Georgia. (Photo by Karen Harris-Shultz, ARS) “What makes the study and the results fascinating is that wind-pollinated grasses, like pearl millet, are rarely promoted as a food source of pollinators in comparison to nectar-rich plants,” said Karen Harris-Shultz, a research geneticist at the ARS Crop Genetics and Breeding Research Unit on the UGA Tifton campus. “Our research shows that pollinators are utilizing grass pollen.” Harris-Shultz added that the study was also the first time that lined earwigs, banded cucumber beetles, two-spotted longhorn bees, and American bumble bees were observed collecting or consuming pollen from the pearl millet crop. ARS researchers in Tifton previously studied pearl millet as a food source for pollinators in 1965, but that study has not been revisited since, according to Harris-Shultz. Harris-Shultz and the researchers’ work focuses on bees and other pollinators of grasses, especially the turfgrass centipede grass and sorghum. The researchers took an interest in pearl millet because of its ability to thrive in areas characterized by drought, low soil fertility, and high temperatures. Bees collecting pollen from pearl millet.Bees collect pearl millet pollen. (Photo by Karen Harris-Shultz, ARS) These traits make pearl millet, which is grown primarily in the southeastern United States, a low-input crop with great benefits for pollinators and farmers looking for a good field border plant. “Contrary to popular belief that grasses have no value to bees and other pollinators, this and our previous studies showed that these grasses can be good food sources for insects and may help combat decline in pollinator populations,” said Harris-Shultz. Various pollinators on pearl millet.A common eastern bumble bee (A), maize calligrapher hover fly (B), cucumber beetle (C) exotic streaktail hover fly (D), two-spotted longhorn bee (E), western honey bee (F-left), sweat bee (F-right), American bumble bee (G), eastern band winged hover fly (H), and lined earwig (I) collecting or consuming pollen from Tift Long-Headed Bulk pearl millet grown at Belflower Farm in Tifton, Georgia in 2023. (Photos by Karen Harris-Shultz, ARS) In addition to being pollinators, several of these insects, such as the hover flies and lined earwigs, are important biological control agents that assist in sustainable pest management.” The study and its findings were published in the *Journal of Entomological Science*. *The University of Georgia**College of Agricultural and Environmental Sciences**(CAES) is a conduit for leading-edge science education and research opportunities to reach students statewide. With campuses in**Athens**,**Griffin**and**Tifton**, all CAES students have the opportunity to work with nationally recognized faculty in entomology, crop and soil sciences, horticulture and more.* *The Agricultural Research Service is the U.S. Department of Agriculture's chief scientific in-house research agency. Daily, ARS focuses on solutions to agricultural problems affecting America. Each dollar invested in U.S. agricultural research results in $20 of economic impact.*


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