Frequencies of nodulation response alleles, Rj₂ and Rj₄, in soybean plant introduction and breeding lines /

Chiefly tables.

Important biological and morphological characteristics of the foliar-feeding aphids of pecan /

Issued May 1978.

Frankliniella : redefinition of genus and revision of minuta group species : Thysanoptera: thripidae /

Issued Oct. 1979.

Technical and economic causes of productivity changes in U.S. wheat production, 1949-76 /

Issued May 1979.

Cotton insect populations : development and impact of predators and other mortality factors /

Cover title.

Probable evolution and morphological variation in South American Disonychine flea beetles (Coleoptera: chrysomelidae) and their amaranthaceous hosts /

Issued June 1979.

Genus Vicia, with notes about tribe Vicieae (Fabaceae) in Mexico and Central America /

Issued Dec. 1979.

The nearctic parasitic wasps of the genera Psilus Panzer and Coptera Say : (Hymenoptera, Proctotrupoidea, Diapriidae) /

Issued July 1980.

Impact of Perillus bioculatus on the Colorado potato beetle and plant damage /

"Issued September 1978"--T.p. verso.

Insects and fungi associated with Cardus thistles (compositae) /

Includes index.

Beef cattle publications and visual materials /

Cover title.

Sheep publications and visual materials /

Cover title.

Insects associated with wild plants in Europe and the Middle East : biological control of weeds surveys /

Includes index.

Horse publications and visual materials /

"October 1980"--p. 2 of cover.

Swine publications and visual materials : 1980 listing /

Cover title.