Population Structure of the Late Blight Pathogen Phytophthora infestans in a Potato Germplasm Nursery in Two Consecutive Years.

abstract：:The fungal biocontrol agent, Paecilomyces lilacinus strain 251 (PL251), was evaluated for its potential to control the root-knot nematode Meloidogyne incognita on tomato at varying application rates and inoculum densities. Conversely to previous studies, significant dose-response relationships could not be established...

journal_title：Phytopathology

authors： Kiewnick S,Neumann S,Sikora RA,Frey JE

更新日期：2011-01-01 00:00:00

abstract：:ABSTRACT Striga aspera and S. hermonthica are sympatric in Africa. Each may serve as virulent gene reservoirs for the other if they hybridize and their hybrids are virulent and fertile. Intraspecific and interspecific crosses were made within and between the species, and reproductive success was determined. Freshly ha...

journal_title：Phytopathology

authors： Aigbokhan EI,Berner DK,Musselman LJ

更新日期：1998-06-01 00:00:00

abstract：:ABSTRACT The effects of take-all epidemics on winter wheat yield formation were determined, and disease-yield relationships were established to assess the agronomic efficacy and economic benefits of control methods. Epidemics were generated in naturally infested fields by varying cropping season, crop order in the rot...

journal_title：Phytopathology

authors： Schoeny A,Jeuffroy MH,Lucas P

更新日期：2001-07-01 00:00:00

abstract：:Bois noir phytoplasma (BNp), widespread in wine-producing areas of Europe and endemic in France and Italy, is classified in the 16SrXII-A subgroup, whose members are referred to as Stolbur phytoplasmas. The 16S rDNA gene of Stolbur phytoplasma shows low variability, and few non-ribosomal genes are available as markers...

journal_title：Phytopathology

authors： Pacifico D,Alma A,Bagnoli B,Foissac X,Pasquini G,Tessitori M,Marzachì C

更新日期：2009-06-01 00:00:00

abstract：:Huanglongbing (HLB) or greening currently is the most devastating citrus disease worldwide. The fastidious phloem-colonizing bacterium 'Candidatus Liberibacter asiaticus' (CLas) is the causal agent of citrus HLB in Florida. Bactericides containing the active ingredient oxytetracycline (OTC) have been used in foliar sp...

journal_title：Phytopathology

authors： Li J,Pang Z,Duan S,Lee D,Kolbasov VG,Wang N

更新日期：2019-12-01 00:00:00

abstract：:ABSTRACT Poplar leaf rust caused by Melampsora medusae f. sp. deltoidae is a widespread disease in North America, where epidemics occur within zones of sympatry and allopatry of telial hosts (Populus spp.) and aecial hosts (Larix spp.). To test the hypothesis that epidemics originate in the zone of sympatry where the ...

journal_title：Phytopathology

authors： Bourassa M,Bernier L,Hamelin RC

更新日期：2007-05-01 00:00:00

abstract：:Scientific communication is facilitated by a data-driven, scientifically sound taxonomy that considers the end-user's needs and established successful practice. Previously (Geiser et al. 2013; Phytopathology 103:400-408. 2013), the Fusarium community voiced near unanimous support for a concept of Fusarium that represe...

journal_title：Phytopathology

authors： Geiser DM,Al-Hatmi A,Aoki T,Arie T,Balmas V,Barnes I,Bergstrom GC,Bhattacharyya MKK,Blomquist CL,Bowden R,Brankovics B,Brown DW,Burgess LW,Bushley K,Busman M,Cano-Lira JF,Carrillo JD,Chang HX,Chen CY,Chen W,Chilve

更新日期：2020-11-17 00:00:00

abstract：:Molecular features and genomic organization were determined for Citrus yellow vein clearing virus (CYVCV), the putative viral causal agent of yellow vein clearing disease of lemon trees, reported in Pakistan, India, and more recently in Turkey and China. CYVCV isolate Y1 from Adana, Turkey, was used for deep sequencin...

journal_title：Phytopathology

authors： Loconsole G,Onelge N,Potere O,Giampetruzzi A,Bozan O,Satar S,De Stradis A,Savino V,Yokomi RK,Saponari M

更新日期：2012-12-01 00:00:00

abstract：:The potential host range of mycoviruses is poorly understood because of the lack of suitable inoculation methods. Recently, successful transfection has been reported for somatically incompatible fungal isolates with purified virus particles of two mycoviruses, the partitivirus RnPV1-W8 (RnPV1) and the mycoreovirus RnM...

journal_title：Phytopathology

authors： Kanematsu S,Sasaki A,Onoue M,Oikawa Y,Ito T

更新日期：2010-09-01 00:00:00

abstract：:ABSTRACT A previously undescribed leaf spot disease of banana has been discovered in southern and Southeast Asia. The fungus identified as the causal agent of this leaf spot has a Mycosphaerella teleomorph stage and a Septoria anamorph stage. Isolation and reinoculation of the fungus to banana reproduced symptoms and ...

journal_title：Phytopathology

authors： Carlier J,Zapater MF,Lapeyre F,Jones DR,Mourichon X

更新日期：2000-08-01 00:00:00

abstract：:Candidatus Liberibacter asiaticus (CLas) is the predominant causal agent of citrus huanglongbing (HLB). The pathogen population size in local tissues and the whole plant are critical for the development of disease symptoms via pathogenicity factors and causing metabolic burden to the host. However, the total populatio...

journal_title：Phytopathology

authors： N C Vasconcelos F,Li J,Pang Z,Vincent C,Wang N

更新日期：2020-10-22 00:00:00

abstract：:ABSTRACT The ability of Thielaviopsis basicola to survive saprophytically in soil was investigated using root tissue from susceptible hosts as organic substrates. Inoculum densities were lower in soils amended with root tissue than in nonamended controls after 2 and 4 weeks of incubation. The greatest decrease occurre...

journal_title：Phytopathology

authors： Hood ME,Shew HD

更新日期：1997-12-01 00:00:00

abstract：:ABSTRACT The colonization of individual flowers in mature pear orchards by Pseudomonas fluorescens strain A506 applied at different times during bloom was measured to determine the receptivity of flowers to colonization and the extent of intra-tree movement over time. Strain A506 populations in flowers open at inocula...

journal_title：Phytopathology

authors： Lindow SE,Suslow TV

更新日期：2003-06-01 00:00:00

abstract：:ABSTRACT A 3.3-kb fragment of genomic DNA from bacteriophage Phi-Ea1h encoding an amylovoran-directed depolymerase lyase was sequenced, and three open reading frames (ORFs) were detected. The first ORF could encode a lysozyme and the second a holin that may form a pore supporting cell lysis by the lysozyme. The third ...

journal_title：Phytopathology

authors： Kim WS,Geider K

更新日期：2000-11-01 00:00:00

abstract：:ABSTRACT The influence exerted by Pythium group F (a minor pathogen ubiquitous in soilless cultures) and P. uncinulatum (a nonpathogenic species) colonization on tomato roots was investigated. In both interactions, infected roots did not exhibit obvious symptoms; however, major physiological changes occurred within th...

journal_title：Phytopathology

authors： Rey P,Benhamou N,Tirilly Y

更新日期：1998-03-01 00:00:00

abstract：:ABSTRACT Nonhost resistance is hypothesized to protect plants in a nonspecific manner. For highly specialized parasites, this hypothesis applies not only to distantly related plants but also to resistant congeners of the host species. Congeners of Populus spp. were hybridized to create two interspecific hybrid poplar ...

journal_title：Phytopathology

authors： Newcombe G

更新日期：2005-07-01 00:00:00

abstract：:ABSTRACT Root-knot nematodes of the genus Meloidogyne are economically important pathogens of a wide range of crops. The tomato resistance gene Mi typically confers resistance to the three major species, M. incognita, M. javanica, and M. arenaria. However, virulent populations completely overcoming the Mi resistance s...

journal_title：Phytopathology

authors： Xu J,Narabu T,Mizukubo T,Hibi T

更新日期：2001-04-01 00:00:00

abstract：:Ralstonia solanacearum causes bacterial wilt on a wide range of plant hosts. Most strains of R. solanacearum are nonpathogenic below 20°C; however, Race 3 Biovar 2 (R3B2) strains are classified as quarantine pathogens because of their ability to infect crops, cause disease, and survive in temperate climates. We have i...

journal_title：Phytopathology

authors： Bocsanczy AM,Achenbach UC,Mangravita-Novo A,Yuen JM,Norman DJ

更新日期：2012-02-01 00:00:00

abstract：:ABSTRACT Amplified fragment length polymorphisms (AFLPs) were used to estimate phylogenetic relationships within Magnaporthe grisea and determine the genetic structure of M. grisea populations associated with tall fescue and St. Augustinegrass in Georgia. Sixteen clonal lineages were identified in a sample population ...

journal_title：Phytopathology

authors： Tredway LP,Stevenson KL,Burpee LL

更新日期：2005-05-01 00:00:00

abstract：:The pathogen that causes Pierce's disease of grapevine, Xylella fastidiosa, is the only known bacterial, arthropod-transmitted plant pathogen that does not circulate in the vector's hemolymph. Instead, bacteria are foregut-borne, persistent in adult vectors but semipersistent in immatures (i.e., bacteria colonize cuti...

journal_title：Phytopathology

authors： Backus EA,Morgan DJ

更新日期：2011-08-01 00:00:00

abstract：:ABSTRACT Digestive cysteine proteinases have been isolated from plant-parasitic nematodes as well as coleopteran and hemipteran insects. Phytocystatins, inhibitors of cysteine proteinases, are found in a number of plants where they may play a role in defense against pathogens and pests. The cDNAs of the phytocystatins...

journal_title：Phytopathology

authors： Samac DA,Smigocki AC

更新日期：2003-07-01 00:00:00

abstract：:ABSTRACT Restriction fragment length polymorphisms (RFLPs) were used to characterize the genetic structures of three field populations of Phaeosphaeria nodorum from Texas, Oregon, and Switzerland. Data from seven nuclear RFLP loci were used to estimate gene diversity and genetic distances and to make indirect measures...

journal_title：Phytopathology

authors： Keller SM,McDermott JM,Pettway RE,Wolfe MS,McDonald BA

更新日期：1997-03-01 00:00:00

abstract：:The major quantitative trait locus (QTL) qHS2.09 plays an important role in resistance to head smut during maize breeding and production. In this study, a near-isogenic line (NIL), L34, which harbors the major QTL qHS2.09 in bin 2.09, was developed using a resistant donor 'Mo17' in a susceptible genetic background 'Hu...

journal_title：Phytopathology

authors： Weng J,Liu X,Wang Z,Wang J,Zhang L,Hao Z,Xie C,Li M,Zhang D,Bai L,Liu C,Zhang S,Li X

更新日期：2012-07-01 00:00:00

abstract：:Fusarium lateritium is a globally distributed plant pathogen. It was recently reported as the causal agent of nut gray necrosis (NGN) on hazelnut. Isolate characterization within F. lateritium was undertaken to investigate how morphological and molecular diversity was associated with host and geographic origin. Morpho...

journal_title：Phytopathology

authors： Vitale S,Santori A,Wajnberg E,Castagnone-Sereno P,Luongo L,Belisario A

更新日期：2011-06-01 00:00:00

abstract：:ABSTRACT The population structure of Guignardia citricarpa sensu lato (anamorph: Phyllosticta citricarpa), a fungus of which strains pathogenic to citrus are subject to phytosanitary legislation in the European Union and the United States, was investigated. Internal transcribed spacer sequences revealed two phylogenet...

journal_title：Phytopathology

authors： Baayen RP,Bonants PJ,Verkley G,Carroll GC,van der Aa HA,de Weerdt M,van Brouwershaven IR,Schutte GC,Maccheroni W,de Blanco CG,Azevedo JL

更新日期：2002-05-01 00:00:00

abstract：:The plant bacterial pathogen Xanthomonas oryzae pv. oryzae causes bacterial blight of rice, which is one of the most destructive rice diseases prevalent in Asia and parts of Africa. Despite many years of research, how X. oryzae pv. oryzae causes bacterial blight of rice is still not completely understood. Here, we sho...

journal_title：Phytopathology

authors： Zhang Y,Wu G,Palmer I,Wang B,Qian G,Fu ZQ,Liu F

更新日期：2019-11-01 00:00:00

abstract：:ABSTRACT Late blight (Phytophthora infestans), pink rot (Phytophthora erythroseptica), leak (Pythium ultimum), dry rot (Fusarium sambucinum), and soft rot (Erwinia carotovora subsp. carotovora and subsp. atroseptica) are particularly damaging diseases of stored potato tubers worldwide. In this study, we present a meth...

journal_title：Phytopathology

authors： Atallah ZK,Stevenson WR

更新日期：2006-09-01 00:00:00

abstract：:ABSTRACT Natural potato late blight epidemics were studied to assess the relative impact of various inoculum sources of Phytophthora infestans in Southern Flevoland (the Netherlands) from 1994 through 1996. Disease surveys were combined with characterization of isolates for mating type and DNA fingerprint pattern usin...

journal_title：Phytopathology

authors： Zwankhuizen MJ,Govers F,Zadoks JC

更新日期：1998-08-01 00:00:00

abstract：:Limber pine (Pinus flexilis) is being threatened by the lethal disease white pine blister rust caused by the non-native pathogen Cronartium ribicola. The types and frequencies of genetic resistance to the rust will likely determine the potential success of restoration or proactive measures. These first extensive inocu...

journal_title：Phytopathology

authors： Schoettle AW,Sniezko RA,Kegley A,Burns KS

更新日期：2014-02-01 00:00:00

abstract：:Previous research has shown that Botrytis cinerea isolates with resistance to multiple chemical classes of fungicides exist in eastern strawberry fields. In this study, the fungicide resistance profiles of 2,130 isolates from flowers of commercial strawberry fields located in multiple states was determined over four c...

journal_title：Phytopathology

authors： Hu MJ,Cox KD,Schnabel G

更新日期：2016-12-01 00:00:00