01025cam a22002891a 4500 agr55000129 DLC 20260227111018.0 790813s1955 dcuab b f000 0 eng c agr55000129 (OCoLC)5267752 U.S. Dept. of Agr. Libr. NSbSU NSbSU DNAL DLC premarc S21 .A72 no. 1107 1 Ag84Te no.1107 F821 L001 L300 Wallis, R. L. (Robert L.), 1902- Ecological studies on the potato psyllid as a pest of potatoes / by R.L. Wallis. Washington : U.S. Dept. of Agriculture, 1955. 24 p. : ill., maps ; 23 cm. Technical bulletin / United States Department of Agriculture ; no. 1107 Caption title. Literature cited: p. [25] Jumping plant-lice. Potatoes Diseases and pests. Technical bulletin (United States. Department of Agriculture) ; no. 1107. 11537 11537