The United States has been invaded by a destructive insect and the U.S. Department of Agriculture is waging an all-out effort to destroy it
Subtitle: the invader is the citrus blackfly
Series: Picture story -- no. 244; Picture story (United States. Department of Agriculture) -- no. 244.
Publisher: U.S. Dept. of Agriculture, Agricultural Research Service
Published: 1971
Place of publication: [Washington, D.C.]
Language: eng
Subjects: Citrus black fly; Biological control
Other titles: Citrus blackfly
Notes: Cover title.

"August 1971."