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Julian Mendel, Christina Burns, Beatrice Kallifatidis, Edward Evans, Jonathan Crane, Kenneth G. Furton, and DeEtta Mills

fungicide presently approved capable of curing an infected tree, although propiconazole has been shown to provide around 12 months of protection when injected or infused prophylactically into trees ( Mayfield et al., 2008 ; Ploetz et al., 2017d ). The

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Jerald K. Pataky and Paul M. Richter

Christensen, 1925 ; Jones, 1918 ). Not only did these initial inbreds differ in incidence of infected plants, susceptible inbreds also could be differentiated by the plant parts on which galls occurred. Griffiths (1928) observed that inbred lines resistant

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Sahar Eid, Keri L. Druffel, Dayle E. Saar, and Hanu R. Pappu

Register of Dahlia Names, 1969 et seq. ). There are more than a dozen viruses that infect dahlia ( Albouy, 1995 ). All of these viruses are RNA viruses except one DNA virus, Dahlia mosaic caulimovirus (DMV). DMV is widely prevalent in cultivated dahlias

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Beatrice Nesi, Debora Trinchello, Sara Lazzereschi, Antonio Grassotti, and Barbara Ruffoni

the sensitivity is low compared with recently introduced polymerase chain reaction techniques ( Spiegel, 2006 ). Reverse transcriptase–polymerase chain reaction (RT-PCR) was used for detection of a Tomato Aspermy Virus isolate that infected

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Jiaqi Yan, Megan M. Dewdney, Pamela D. Roberts, and Mark A. Ritenour

has been found in three counties: Collier, Hendry, and Polk. The infected groves in these counties have been designated restricted quarantine areas ( USDA-APHIS, 2012 ). However, for the Polk County discovery, no subsequent CBS detections have occurred

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James D. McCreight and Michael D. Coffey

strain of G. cichoracearum isolated from Arabidopsis thaliana (L.) Heynh. was able to infect cucurbits, including melon ( Adam et al., 1999 ). CPM has been successfully controlled by applications of fungicides ( McGrath, 2001 ) and genetic, host plant

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Kaori Ando, Sue Hammar, and Rebecca Grumet

.g., damping-off on processing pumpkin and fruit rot on cucumber). It is favored by wet and warm environments and can spread with water such as rain splash or irrigation. The symptoms observed during the disease progression of P. capsici -infected fruit are a

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Cecilia E. McGregor, Douglas W. Miano, Don R. LaBonte, Mary Hoy, Chris A. Clark, and Guilherme J.M. Rosa

), and typical symptoms include sunken secondary veins, interveinal chlorosis, and sometimes purpling, especially on older leaves ( Gutierrez et al., 2003 ). SPVD develops when SPFMV and SPCSV both infect sweetpotato plants. Dual infection leads to a

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Sandra E. Branham, Mark W. Farnham, Shane M. Robinson, and W. Patrick Wechter

). Pseudomonas syringae pv. alisalensis has since been reclassified as Pca ( Bull et al., 2010a ). Pseudomonas cannabina pv. alisalensis is capable of infecting a wide range of Brassicas , including crop varieties of multiple species: Brassica rapa L

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Craig Brodersen, Cody Narciso, Mary Reed, and Ed Etxeberria

healthy, although some leaves can be either severely deformed by psyllid feeding or eventually develop the typical blotchy mottling and yellowing patterns characteristic of the disease ( Fig. 1 ). In trees known to have been infected with HLB for several