Psylla

An analysis of pear psylla populations 1977-79

R. E. Fye

The food of orchard birds with special reference to the pear psylla

T.T. Odell

A Bibliography of Psylla (Homoptera: Psyllidae) on pear trees.

United States. Science and Education Administration

Evaluation of the possible role of predaceous ants in the management of pear psylla, Cacopsylla pyricola (Foerster) (Homoptera:Psyllidae)

by Gregory Stephen Paulson.

The pear psylla in Oregon

[P.H. Westigard and R.W. Zwick].

Transplanting ants to pear orchards for psylla control

[by Roger D. Akre and G. S. Paulson.

Rearing and release of Coccinellids for potential control of pear psylla.

R. E. Fye

Pear psylla detection and control

[by Arthur H. Retan, Everett Burtts [sic], and Vanelle Carrithers].

Pear psylla

[prepared by Arthur H. Retan, Everett Burtts, vanelle Peterson].

Psillidy (Homoptera, Psylloidea) i͡u︡go-zapada evropeĭskoĭ chasti SSSR

A.G. Poddubnyĭ ; otvetstvennyĭ redaktor B.V. Vereshchagin.