Zobrazeno 1 - 10
of 342
pro vyhledávání: '"W R Stevenson"'
Publikováno v:
Plant disease. 82(4)
Late blight of potato (Solanum tuberosum), caused by Phytophthora infestans, recently reappeared in Wisconsin and was a significant production problem in 1994. P. infestans isolates collected in Wisconsin from 1993 to 1995 were characterized for the
Autor:
Leslie R. Cooperband, A. G. Stone, R. V. James, Robert M. Goodman, H. M. Darby, Gary E. Vallad, Dorith Rotenberg, W. R. Stevenson
Publikováno v:
Plant disease. 87(9)
Several paper mills in Wisconsin have programs for spreading paper mill residuals (PMR) on land. A growing number of vegetable farmers recognize the agronomic benefits of PMR applications, but there have been no investigations on the use of PMR for c
Autor:
W. R. Stevenson, P M Rogers
Publikováno v:
Plant disease. 90(3)
Foliar diseases of carrot caused by Alternaria dauci and Cercospora carotae occur every year in Wisconsin, requiring repeated foliar fungicide applications to minimize defoliation and yield reduction. Improved timing of fungicide applications combine
Autor:
Dennis A. Johnson, W. R. Stevenson, R. Thomas Schotzko, R. E. Thornton, R. V. James, Debra Ann Inglis
Publikováno v:
Plant disease. 91(10)
Defender (A90586-11) is a new late blight-resistant potato cultivar which was released from the Tri-State Potato Variety Development Program in 2004. Conventional and reduced fungicide spray programs were compared on Defender and Russet Burbank (3 ye
Publikováno v:
Plant disease. 92(4)
Azoxystrobin is a common fungicide used by farmers of Solanaceous crops against Alternaria solani, but there was growing concern about decreased sensitivity with repeated applications. In 2002 and 2003, monitoring of A. solani from commercial potato
Publikováno v:
Plant disease. 92(4)
Potato early blight (Alternaria solani) is a yield-limiting disease and control depends primarily on multiple fungicide applications. Azoxystrobin, registered in the United States in 1999, initially provided outstanding early blight control. Within 3
Autor:
P. M. Rogers, W. R. Stevenson
Publikováno v:
Plant disease. 94(4)
Isolates of Alternaria dauci causing Alternaria leaf blight (ALB) were collected from commercial carrot (Daucus carota var. sativus) fields in northeastern North America during 2004. Twenty-two isolates representing a range of genetic diversity were
Publikováno v:
Phytoparasitica. 40:269-278
Studies were undertaken to evaluate locally available subtrates for use in a culture medium for Phytophthora infestans (Mont.) de Bary employing a protocol similar to that used for the preparation of rye A agar. Test media preparations were assessed
Autor:
W. R. Stevenson
Publikováno v:
Acta Horticulturae. :83-86
Publikováno v:
Plant Disease. 91:1137-1141
Potato early dying (PED), caused by Verticillium dahliae, is a chronic yield-limiting disease of potato (Solanum tuberosum). In this study, we describe the colonization dynamics of V. dahliae in two potato cultivars with varying responses to PED. We