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A.R. Biggs

cankers. The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.

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Whitney J. Garton, Mark Mazzola, Nairanjana Dasgupta, Travis R. Alexander and Carol A. Miles

, assuming a fruit price of $0.36/lb ( Galinato et al., 2014 ; Northwest Cider Association, 2016). A major obstacle to long-term orchard productivity and continued expansion in western Washington is the widespread occurrence of anthracnose canker on apple

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Naofumi Hiehata, Yoshihiko Sato, Shinji Fukuda, Yukiko Tominaga, Osamu Terai and Hirohisa Nesumi

Loquat canker, caused by Pseudomonas syringae pv. eriobotryae , attacks the buds, shoots, leaves, fruit, and underground parts of the loquat tree ( Morita, 1988 ; Mukoo, 1952 ; Suga et al., 2007 ) and has a detrimental effect on vegetative

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Whitney J. Garton, Mark Mazzola, Travis R. Alexander and Carol A. Miles

Anthracnose canker, caused by Neofabraea malicorticis , induces tree cankers that can kill newly planted cider apple trees west of the Cascade Mountains in the U.S. Pacific Northwest (PNW) ( Garton et al., 2018a ; Rahe, 1997a ). N. malicorticis

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Edward A. Evans, Fredy H. Ballen and Jonathan H. Crane

recovery (J.H. Crane, personal communication; T.H. Spreen, personal communication; C. Wheeling, personal communication) when it suffered the most severe blow yet with the discovery of the citrus canker disease in the main lime-producing area. At that time

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Ed Stover, Randall Driggers, Matthew L. Richardson, David G. Hall, Yongping Duan and Richard F. Lee

Asiatic citrus canker (caused by Xcc) was the focus of extensive eradication efforts in Florida until 2005 but is now widespread in Florida citrus ( Gottwald et al., 2002 ; Irey et al., 2006 ). ACC is largely a disease of foliage and fruit that is

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Loong S. Chang, Amy Iezzoni and Gerald Adams

Heritability and the genetic and environmental variance components of resistance to the canker-causing pathogen Leucostoma persoorrii were estimated in a population of diverse peach (Prunus persica L.)-genotypes. Disease resistance was measured as the length of necrotic tissue, i.e., canker length, following artificial inoculation in the field. Genetic and environmental variations were partitioned as variance components of the linear statistical model. Heritability was estimated by regressing average performance of seedlings on performance of their maternal parent. The genetic variance was highly significant, and the heritability for canker necrotic length was relatively high (0.72), suggesting that it should be possible to select L. persoonii -resistant individuals within the population.

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Ed Stover, Richard R. Stange Jr., T. Gregory McCollum, Jesse Jaynes, Michael Irey and Erik Mirkov

Considerable effort is being devoted to developing transgenic citrus with resistance to huanglongbing and asiatic citrus canker. These bacterial diseases seriously threaten the sustainability of the Florida citrus industry. No strong HLB resistance

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Naofumi Hiehata, Shinji Fukuda, Yoshihiko Sato, Yukiko Tominaga, Osamu Terai and Masahiko Yamada

Loquat canker, caused by Pseudomonas syringae pv. eriobotryae , is a bacterial disease that has been reported for nearly a century in Japan ( Ikata, 1927 ; Nakata, 1934 ). The disease has also been reported in China ( Lin et al., 1999 ), the

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B.L. Topp, W.B. Sherman, D.A. Huber and S.B. Linda

Analysis of a five-parent diallel in a greenhouse estimated general and specific combining ability (GCA and SCA) effects for resistance of Japanese plum (Prunus salicina Lindl. and hybrids) to Xanthomonas campestris pv. pruni (Smith) Dye stem canker, as measured by length of inoculated cankers, canker appearance rating, and canker expansion rate. `Friar' and `Gulfruby' were the most susceptible parents. `Burbank', `Wilson', and' Wade' had similar GCA values for length of inoculated cankers, but' Wade' was the superior parent in transmitting canker resistance, as measured by canker appearance rating. SCA was not important in determining the performance of a cross. Canker appearance rating was the best measure of resistance in the greenhouse tests and provided a greater separation of GCA estimates and lower coefficient of variation.