American Phytopathological Society Board & Staff. VIEW ABSTRACT | VIEW ARTICLE
Obituary
Charles Stewart Holton. 1904-1980. George W. Fischer. Page 663.VIEW ABSTRACT | VIEW ARTICLE
Obituary
Samuel Andrew Wingard, 1895-1980. R. G. Henderson and C. W. Roane. Page 664. VIEW ABSTRACT | VIEW ARTICLE
Letter to the Editor
On Estimating Parasitic Fitness. Richard A. Fleming. Pages 665-666. VIEW ABSTRACT | VIEW ARTICLE
Etiology
Characterization of a Potyvirus That Causes Zucchini Yellow Mosaic. Vittoria Lisa, Guido Boccardo, Giovanni D’Agostino, Giuseppina Dellavalle, and Mariangela d’Aquilio. Pages 667-672. VIEW ABSTRACT | VIEW ARTICLE
Etiology
Virions and Ultrastructural Changes Associated with Blueberry Red Ringspot Disease. K. S. Kim, D. C. Ramsdell, J. M. Gillett, and J. P. Fulton. Pages 673-678. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Biotypes of Stemphylium botryosum on Alfalfa in North America. W. A. Cowling, D. G. Gilchrist, and J. H. Graham. Pages 679-684. VIEW ABSTRACT | VIEW ARTICLE
Disease Detection and Losses
A Loss Model for Crops. L. V. Madden, S. P. Pennypacker, C. E. Antle, and C. H. Kingsolver. Pages 685-689. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Persistence of Pseudomonas solanacearum (Race 1) in a Naturally Infested Soil in Costa Rica. M. T. Jackson, L. C. González. Pages 690-693. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Colonization of Soybean Seeds and Plant Tissue by Fusarium Species in Soil. R. L. Schlub, J. L. Lockwood, and H. Komada. Pages 693-697. VIEW ABSTRACT | VIEW ARTICLE
Cytology and Histology
Early Proliferation and Migration and Subsequent Xylem Occlusion by Erwinia amylovora and the Fate of its Extracellular Polysaccharide (EPS) in Apple Shoots. Charles G. Suhayda, R. N. Goodman. Pages 697-707. VIEW ABSTRACT | VIEW ARTICLE
Physiology and Biochemistry
Accumulation of Furanoterpenoids in Sweet Potato Tissue Following Inoculation with Different Pathogens. C. A. Clark, Amanda Lawrence, and F. A. Martin. Pages 708-711. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Influence of Vesicular Arbuscular Mycorrhizae on the Growth of Apple and Corn in Low-Phosphorous Soil. R. P. Covey, B. L. Koch, and H. J. Larsen. Pages 712-715. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Comparison of the Gompertz and Logistic Equations to Describe Plant Disease Progress. R. D. Berger. Pages 716-719. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
Preemergence Herbicides and the Severity of Leaf Spot Caused by Drechslera sorokiniana on Poa pratensis. Clinton F. Hodges. Pages 720-722. VIEW ABSTRACT | VIEW ARTICLE
Physiology and Biochemistry
The Effects of the Fungicide, Iprodione, on the Mycelium of Sclerotinia sclerotiorum. Charles C. Reilly, Gerald L. Lamoureux. Pages 722-727. VIEW ABSTRACT | VIEW ARTICLE
Ecology and Epidemiology
A Model for Detecting Infection Periods of Coccomyces hiemalis on Sour Cherry. S. P. Eisensmith, A. L. Jones. Pages 728-732. VIEW ABSTRACT | VIEW ARTICLE
Cytology and Histology
Relation of Postpenetration Events in Idaed 59 Wheat Seedlings of Low Receptivity to Infection by Puccinia graminis f. sp. tritici. J. B. Rowell. Pages 732-736. VIEW ABSTRACT | VIEW ARTICLE
Disease Control and Pest Management
Evaluation of Two Triazole Fungicides for Postinfection Control of Apple Scab. R. D. Kelley, A. L. Jones. Pages 737-742. VIEW ABSTRACT | VIEW ARTICLE
Symposium on Specificity in Host-Parasite and Other Cellular Interactions
Are Lectins Involved in Plant-Fungus Interactions? Marilynn E. Etzler. Pages 744-746. VIEW ABSTRACT | VIEW ARTICLE
Symposium on Specificity in Host-Parasite and Other Cellular Interactions
A Major Incompatibility System in Mice—The H-2 Complex. William C. Davis. Pages 747-751. VIEW ABSTRACT | VIEW ARTICLE
Symposium on Specificity in Host-Parasite and Other Cellular Interactions
Biochemistry and Physiology of Recognition in Pollen-Stigma Interactions. Thomas E. Ferrari, Soo Seong Lee, and Donald H. Wallace. Pages 752-755. VIEW ABSTRACT | VIEW ARTICLE
Symposium on Specificity in Host-Parasite and Other Cellular Interactions
Molecular Communication in Host-Parasite Interactions: Hexosamine Polymers (Chitosan) as Regulator Compounds in Race-Specific and Other Interactions. Lee A. Hadwiger, David C. Loschke. Pages 756-762. VIEW ABSTRACT | VIEW ARTICLE
Abstracts
Abstracts of the Annual Meeting of the Potomac Division of the APS for 1981. Pages 763-772. VIEW ABSTRACT | VIEW ARTICLE
