Onion maggot
Lovett, A.L.
Onion maggot - Corvallis 1923 - 1-3 p. - Onion Oregon Agricultural Experiment Station. Circular No. 37 .
Onion maggot - Corvallis 1923 - 1-3 p. - Onion Oregon Agricultural Experiment Station. Circular No. 37 .