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Luisa Santamaria, Emmalea G. Ernest, Nancy F. Gregory, and Thomas A. Evans

. polystachios is an alternate host for downy mildew. In later dew chamber evaluations, five of five plants inoculated at the hypocotyl stage were susceptible to race E and two of five plants were susceptible to race F. These preliminary results suggest that

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George E. Boyhan, Julia W. Gaskin, Elizabeth L. Little, Esendugue G. Fonsah, and Suzanne P. Stone

have shown the use of crop rotations and cover crops diminish disease severity (percent host tissue infected) and incidence [i.e., number of plants infected ( Koike et al., 2000 )]. Alternating nonhost crops after a host crop can lessen the season

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Michael C. Long, Stephen L. Krebs, and Stan C. Hokanson

reported on evergreen azaleas (subgenus Tsutsusi) ( Galle, 1987 ; Holcomb and Ferrin, 2006 ). The incidence of PM disease appears to have increased in recent years, possibly as a result of an expansion in host range. Although deciduous azaleas have long

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Timothy Coolong and Kenneth Seebold

, a high (homozygous)-resistance variety was not trialed. More information is necessary to assess the impact of host resistance to PM and the possible interaction with fungicide programs to adequately manage this disease. The objectives of this trial

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Beiquan Mou, Steven J. Klosterman, Amy Anchieta, Elisabeth Wood, and Krishna V. Subbarao

infection with V. dahliae may prevent or reduce the introduction of new inocula to regions where susceptible alternate host crops are produced, such as in central coastal California. Although lower disease incidence and severity generally corresponded to

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Gary E. Vallad, Kenneth L. Pernezny, Botond Balogh, Aimin Wen, Jose Francisco L. Figueiredo, Jeffrey B. Jones, Timur Momol, Rosa M. Muchovej, Nikol Havranek, Nadia Abdallah, Steve Olson, and Pamela D. Roberts

that are usually copper-based ( Jones 1991 ; Jones and Jones, 1985 ). Although host resistance has been identified in tomato ( Scott and Jones, 1986 ; Scott et al., 1997 ), commercial cultivars lack resistance to the predominant Florida field races of

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Michael W. Smith, William D. Goff, and M. Lenny Wells

unproductive. Wood et al. (2004a , 2004b ) conclusively demonstrated that mouse-ear was caused by nickel deficiency. Routine foliar application of a commercially available nickel product eliminated this problem. Crown gall has the broadest host range of any

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Adam Dale, Becky R. Hughes, and Danielle Donnelly

paper reviews the protocols used to develop specific pathogen-tested strawberry plants in Ontario and, where appropriate, discusses alternate techniques. To help explain our protocol, a schematic is given ( Fig. 1 ). For convenience, the discussion is

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Ricardo Goenaga and David Jenkins

consumed fresh or processed to prepare ice cream or milkshakes. The fruit is high in vitamins A and E, minerals, and carotenoid content [ Alia-Tejacal et al., 2007 ; U.S. Department of Agriculture (USDA), 2011 ]. The fruit has been shown not to be a host

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Narinder P.S. Dhillon, Supannika Sanguansil, Supornpun Srimat, Suwannee Laenoi, Roland Schafleitner, Michel Pitrat, and James D. McCreight

CPM can be achieved through genetic host plant resistance. One hundred fifty BG accessions of the World Vegetable Center Genebank were screened for resistance to a local isolate of Px at Kamphaeng Saen, Thailand. A single resistant plant was