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An Appalachian portrait: black and white in Montgomery County, Virginia, before the Civil War

Grant, Charles L. (Virginia Tech, 1987-05-15)

Montgomery County, Virginia, is a southern Appalachian county founded in 1776. Throughout the county's antebellum history, as with most other regions of the South, four major population groups were visibly present. ...

Relative susceptibility to slide-dip application of cyhexatin in three populations of Panonychus ulmi (Koch) in Virginia apple orchards

Pfeiffer, Douglas G.; Pfeiffer, S. W. (1986)

Effect of tree fertilization on numbers and development of pear psylla (Homoptera: Psyllidae), and on fruit damage

Pfeiffer, Douglas G.; Burts, E. C. (1983)

Effects of field applications of paraquat on densities of Panonychus ulmi (Koch) and Neoseiulus fallacis (Garman)

Pfeiffer, Douglas G. (1986)

Neoseiulus fallacis (Garman) is the most important acarine predator of the European red mite, Panonychus ulmi (Koch), in sprayed apple orchards in the eastern United States [Poe, S. L., and W. R. Enns. 1969. ...

Coleoptera of poultry manure in caged-layer houses in North Carolina

Pfeiffer, Douglas G. (1980)

Effect of tree fertilization on protein and free amino acid content and feeding rate of pear psylla (Homoptera: Psyllidae)

Pfeiffer, Douglas G.; Burts, E. C. (1984)

Disruption of olfactory communication in oriental fruit moth and lesser appleworm in a Virginia peach orchard

Pfeiffer, Douglas G.; Killian, J. C. (1988)

Nitrogen and potassium fertilization effects on yield and quality of burley tobacco

Evanylo, G. K.; Sims, J. L.; Grove, J. H. (1987)

Apple fruit nonstructural carbohydrates and abscission as influenced by shade and terbacil

Polomski, Robert (Virginia Polytechnic Institute and State University, 1986)

The theory that fruit abscission may be the result of a reduction in metabolites available to the young fruit was addressed by this study. Shade cloth or terbacil, a photosynthetic inhibitor, were applied to limbs and whole ...