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1. A Study of the Sugarcane Yellow Leaf Disease in Argentina

Author:
Bertani, R. P.; Perera, M. F.; Arias, M. E.; Luque, C.; Funes, C.; González, V.; Cuenya, M. I.; Ploper, L. D.; Welin, B.; Castagnaro, A. P.
Source:
Plant disease 2014 v.98 no.8 pp. 1036-1042
ISSN:
0191-2917
Subject:
Sugarcane yellow leaf virus; bundle sheath cells; chloroplasts; coat proteins; disease detection; foliar diseases; genes; genotype; leaves; phytoplasmal diseases; reverse transcriptase polymerase chain reaction; sequence analysis; starch; sugarcane; viruses; Argentina
Abstract:
... Yellow leaf disease, caused by Sugarcane yellow leaf virus (SCYLV), is widespread around the world but very little information is available on this viral disease in Argentina. Therefore, the aims of the study were to assess the presence of SCYLV, analyze its distribution in the main sugarcane production areas of Argentina, characterize the virus, and determine histological alterations caused by it ...
DOI:
10.1094/PDIS-12-13-1251-RE

2. First Report of Aphelenchoides besseyi Causing White Tip Disease of Rice in Jilin Province, China

Author:
Ou, S. Q.; Gao, J.; Peng, D. L.; Qi, C. Y.; Zhang, J. H.; Meng, Y.; Lu, B. H.
Source:
Plant disease 2014 v.98 no.8 pp. 1165
ISSN:
0191-2917
Subject:
Aphelenchoides besseyi; DNA primers; body length; cities; esophagus; females; genes; genetic databases; growth retardation; inflorescences; internal transcribed spacers; intestines; leaves; males; necrosis; oocytes; pathogens; plant parasitic nematodes; polymerase chain reaction; quarantine; ribosomal DNA; rice; seeds; surveys; tail; China; India; Russia
Abstract:
... White tip disease of rice caused by the plant-parasitic nematode Aphelenchoides besseyi is an important domestic quarantine issue causing heavy yield losses of rice. During a survey for rice diseases in 2013, suspect white tip disease of rice was observed in the cities of Changchun and Gongzhuling, Jinlin Province, China. Leaf tips of susceptible rice varieties were white or yellow, becoming brown ...
DOI:
10.1094/PDIS-01-14-0020-PDN

3. First Report of Cercospora apii, Causal Agent of Cercospora Early Blight of Celery, in Serbia

Author:
Milosavljević, A.; Pfaf-Dolovac, E.; Mitrović, M.; Jović, J.; Toševski, I.; Duduk, N.; Trkulja, N.
Source:
Plant disease 2014 v.98 no.8 pp. 1157
ISSN:
0191-2917
Subject:
Apium graveolens var. dulce; Cercospora apii; agar; blight; calmodulin; celery; conidia; conidiophores; disease severity; ethanol; fungi; genes; genetic databases; greenhouses; histones; internal transcribed spacers; leaves; mycelium; pathogenicity; pathogens; seedlings; surveys; vegetable crops; Serbia
Abstract:
... Celery (Apium graveolens var. dulce) is a very important vegetable crop intensively cultivated in eastern and southern Serbia. During a field survey in August and September 2012, we observed symptoms similar to those of Cercospora early blight in eastern Serbia, with some of the affected fields showing up to 80% disease severity. The lesions on leaves were amphigenous, subcircular to angular and m ...
DOI:
10.1094/PDIS-02-14-0135-PDN

4. First Report of Cherry mottle leaf virus Infecting Cherry in China

Author:
Ma, Y. X.; Li, J. J.; Li, G. F.; Zhu, S. F.
Source:
Plant disease 2014 v.98 no.8 pp. 1161
ISSN:
0191-2917
Subject:
Cherry mottle leaf virus; Eriophyes; Prunus avium; Prunus emarginata; RNA; RNA-directed DNA polymerase; cherries; clones; coat proteins; complementary DNA; cultivars; financial economics; genes; hybrids; leaves; mites; nucleotide sequences; orchards; peaches; plant diseases and disorders; plant viruses; planting; polymerase chain reaction; propagation materials; rootstocks; sequence alignment; small fruits; surveys; trees; viruses; wood; China
Abstract:
... Cherry mottle leaf virus (CMLV) is a member of the genus Trichovirus (family Betaflexiviridae). CMLV infects several species of the genus Prunus including cherry (Prunus avium) and peach (P. persica) (2,3). It is spread via budding and grafting with infected wood and can be transmitted from infected bitter cherry (P. emarginata), or infected but symptomless peach trees to healthy sweet cherry tree ...
DOI:
10.1094/PDIS-01-14-0002-PDN

5. First Report of Citrus leprosis virus Nuclear Type in Sweet Orange in Colombia

Author:
Roy, Avijit; León, M. G.; Stone Schneider, A. L. W. L.; Hartung, J. S.; Brlansky, R. H.
Source:
Plant disease 2014 v.98 no.8 pp. 1162
ISSN:
0191-2917
Subject:
Brevipalpus; Citrus leprosis virus C; Citrus sinensis; Dichorhavirus; RNA; Tetranychidae; coat proteins; color; crop production; cytoplasm; genes; leaves; mixed infection; molecular cloning; new genus; nucleocapsid; nucleotide sequences; oranges; phylogeny; reverse transcriptase polymerase chain reaction; sequence analysis; viruses; Brazil; Colombia; Mexico; Panama
Abstract:
... Colombia is ranked 18th in the world in citrus production and contributed 0.9% of the total world share. Among four important citrus-producing regions of Colombia, the Orinoco region (3 to 6°N, 68 to 74°W) consists of two citrus-producing states, Meta and Casanare. Citrus leprosis is the most important viral disease of citrus in Colombia (1,3). Three types of Citrus leprosis virus (CiLV) infect ci ...
DOI:
10.1094/PDIS-01-14-0083-PDN

6. First Report of Leaf Spot Caused by Alternaria alternata on Marigold (Tagetes erecta) in Beijing, China

Author:
Li, Y.; Shen, J.; Pan, B. H.; Guo, M. X.; Wang, Q. X.; Ouyang, C. B.; Yan, D. D.; Cao, A. C.
Source:
Plant disease 2014 v.98 no.8 pp. 1153
ISSN:
0191-2917
Subject:
Alternaria alternata; DNA primers; Tagetes erecta; agar; beans; color; conidia; conidiophores; flowers; fungi; genes; genetic databases; growth chambers; internal transcribed spacers; leaf spot; leaves; light intensity; pathogenicity; photoperiod; planting; polymerase chain reaction; relative humidity; ribosomal DNA; China; Japan
Abstract:
... Marigold (Tagetes erecta) is an important commercial crop and 200 ha are planted every year in the Beijing district of China. A leaf spot disease of T. erecta was observed during 2012 and 2013 in the Beijing district. The disease was widespread, with 60 to 75% of the fields affected. Leaves of the affected plants had small, brown, necrotic spots on most of the foliage. Yield losses of flowers of u ...
DOI:
10.1094/PDIS-08-13-0858-PDN

7. First Report of Taro vein chlorosis virus Infecting Taro (Colocasia esculenta) in the United States

Author:
Long, M. H.; Ayin, C.; Li, R.; Hu, J. S.; Melzer, M. J.
Source:
Plant disease 2014 v.98 no.8 pp. 1160
ISSN:
0191-2917
Subject:
Colocasia esculenta; DNA primers; RNA; RNA-directed DNA polymerase; RNA-directed RNA polymerase; Taro vein chlorosis virus; arthropods; chlorosis; clones; complementary DNA; disease vectors; farmers; genes; genetic databases; genetic variation; germplasm; islands; leaves; molecular cloning; necrosis; nucleic acid hybridization; nucleocapsid; plant diseases and disorders; plant viruses; polymerase chain reaction; taro; viruses; Molokai; Pennsylvania
Abstract:
... In March 2013, taro plants (Colocasia esculenta [L.] Schott cv. Iliuaua) with leaves displaying veinal chlorosis and necrosis were observed on the island of Molokai. These symptoms were similar to those of taro vein chlorosis, a disease of taro caused by Taro vein chlorosis virus (TaVCV; family Rhabdoviridae, genus Nucleorhabdovirus). To explore this possibility, RNA was isolated from both symptom ...
DOI:
10.1094/PDIS-03-14-0244-PDN

8. Physiologic Specialization of Puccinia triticina on Wheat in the United States in 2012

Author:
Kolmer, J. A; Hughes, M. E.
Source:
Plant disease 2014 v.98 no.8 pp. 1145-1150
ISSN:
0191-2917
Subject:
Puccinia recondita; breeding; cultivars; genes; hard red spring wheat; hard red winter wheat; human resources; leaf rust; leaves; phenotype; soft red winter wheat; virulence; Eastern United States; Great Plains region; Idaho; Ohio River; Washington (state)
Abstract:
... Collections of Puccinia triticina were obtained from rust-infected leaves provided by cooperators throughout the United States and from wheat fields and breeding plots by United States Department of Agriculture–Agricultural Research Service personnel and cooperators in the Great Plains, Ohio River Valley, southeastern states, and Washington State and Idaho in order to determine the virulence of th ...
DOI:
10.1094/PDIS-12-13-1267-SR