SCOTT BAUER / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY SCOTT BAUER / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
Editorial use only.
Agricultural research. Entomologist releasing bumble bees into a field cage for the controlled pollination of a population of zinnias (Zinnia sp.). By hand-pollinating the flowers this way, their genetic variability can be maintained. This research was performed for the United States Department of Agriculture at the North Central Regional Plant Introduction Station, Iowa, USA.
Model release not available. Property release not required.