Publication
Burts E. C. & Kelly S. J. 1966 - The effect of pear psylla, Psylla pyricola, control on growth and survival of Bartlett pear trees on two rootstocks. Journal of Economic Entomology 59(1): 192-194.
| |||
Cacopsylla (Hepatopsylla) pyricola (Foerster, 1848) |