Host-parasite relationships of the clover cyst nematode, Heterodera trifolii Goffart /

Cover title.

A host-parasite catalog of North American Tachinidae (Diptera) /

Issued June 1978.

The serphoid and chalcidoid parasites of the hessian fly /

Caption title.

Population density relationships between hymenopterous parasites and their aphid hosts--a theoretical study

Includes bibliographical references.

Pathogenic specialization in cereal rust fungi, especially Puccinia recondita f. sp. tritici: concepts, methods of study, and application

Issued in cooperation with Kansas Agricultural Experiment Station.

Microlepidoptera and their parasites reared from field collections in the Northeastern United States /

Includes index.