Integrated control of pear Psylla in Oregon's Hood River Valley /
Zwick, R. W.
Integrated control of pear Psylla in Oregon's Hood River Valley / R.W. Zwick and G.J. Fields - Corvallis : Agricultural Experiment Station - 8 p. - Circular of information; 660 .
205515
Control de Plagas
Pera -- plagas
Psylla pyricola
Integrated control of pear Psylla in Oregon's Hood River Valley / R.W. Zwick and G.J. Fields - Corvallis : Agricultural Experiment Station - 8 p. - Circular of information; 660 .
205515
Control de Plagas
Pera -- plagas
Psylla pyricola