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You searched for: Journal Plant disease Remove constraint Journal: Plant disease Publication Year 2006 Remove constraint Publication Year: 2006 Source 2006 v.90 no.2 Remove constraint Source: 2006 v.90 no.2
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1. A new phytoplasm infecting lettuce in Iran

Author:
Salehi, M.; Izadpanah, K.; Nejat, N.
Source:
Plant disease 2006 v.90 no.2 pp. 247
ISSN:
0191-2917
Subject:
phytoplasmal diseases; disease transmission; 16SrI (Aster yellows group); ribosomal DNA; internal transcribed spacers; pathogen identification; Lactuca sativa; lettuce; vegetable crops; host plants; new geographic records; new host records; Iran
DOI:
10.1094/PD-90-0247C

2. A new report of Phytophthora ramorum on Rhamnus purshiana in Northern California

Author:
Vettraino, A.M.; Huberli, D.; Swain, S.; Smith, A.; Garbelotto, M.
Source:
Plant disease 2006 v.90 no.2 pp. 246
ISSN:
0191-2917
Subject:
Phytophthora ramorum; shrubs; fungal diseases of plants; host plants; Frangula purshiana; internal transcribed spacers; leaf spot; pathogen identification; plant pathogenic fungi; fungal anatomy; new geographic records; California
DOI:
10.1094/PD-90-0246C

3. Beet root-rot inducing isolates of Fusarium oxysporum from Colorado and Montana

Author:
Hanson, L.E.; Jacobsen, B.J.
Source:
Plant disease 2006 v.90 no.2 pp. 247
ISSN:
0191-2917
Subject:
root rot; Fusarium oxysporum; plant pathogenic fungi; pathogen identification; pathogenicity; Beta vulgaris subsp. vulgaris; sugar beet; host plants; new geographic records; Colorado; Montana
DOI:
10.1094/PD-90-0247A

4. Cellulase activity in isolates of Verticillium dahliae differing in aggressiveness

Author:
Novo, M.; Pomar, F.; Gayoso, C.; Merino, F.
Source:
Plant disease 2006 v.90 no.2 pp. 155-160
ISSN:
0191-2917
Subject:
soil fungi; random amplified polymorphic DNA technique; Capsicum annuum; mycelium; enzyme activity; host plants; disease severity; pathogenicity; plant pathogenic fungi; Verticillium wilt; hydrolysis; peppers; temperature; endo-1,4-beta-glucanase; Verticillium dahliae; beta-glucosidase; disease incidence; Spain
Abstract:
... Ten Verticillium dahliae isolates from different Galician locations were classified by degree of aggressiveness. High variability exists independent of locality of origin. Two isolates differing in aggressiveness were evaluated for cellulase production on several carbon sources. V. dahliae is able to degrade crystalline cellulose (Avicel) and, therefore, has the three enzymes necessary for its hyd ...
DOI:
10.1094/PD-90-0155

5. Fertility and mating type frequency in Indian isolates of Sclerospora graminicola, the downy mildew pathogen of pearl millet

Author:
Pushpavathi, B.; Thakur, R.P.; Rao, K.C.
Source:
Plant disease 2006 v.90 no.2 pp. 211-214
ISSN:
0191-2917
Subject:
downy mildew; Sclerospora graminicola; plant pathogenic fungi; zoospores; microbial physiology; Pennisetum glaucum; millets; host plants; India
Abstract:
... Sclerospora graminicola, the downy mildew pathogen of pearl millet, is an oomycetous obligate parasite which reproduces by both sexual and asexual means. Fertility and mating type frequencies were studied in 70 single-zoospore isolates (SZIs) obtained from seven representative oosporic isolates (Sg 021, Sg 048, Sg 110, Sg 139, Sg 149, Sg 152, and Sg 153) of S. graminicola collected from major pear ...
DOI:
10.1094/PD-90-0211

6. Field application of Dilophospora alopecuri to manage annual ryegrass toxicity caused by Rathayibacter toxicus

Author:
Barbetti, M.J.; Riley, I.T.
Source:
Plant disease 2006 v.90 no.2 pp. 229-232
ISSN:
0191-2917
Subject:
biological control agents; Rathayibacter toxicus; bacterial toxins; Lolium rigidum; grasses; host plants; Anguina
Abstract:
... Field experiments were conducted in three consecutive years to determine the effect of Dilophospora alopecuri inoculation on the incidence of galls with Rathayibacter toxicus in annual ryegrass (Lolium rigidum). R. toxicus is carried into the grass by the seed gall nematode, Anguina funesta, and colonizes the ovules, displacing the nematodes, and producing the toxin responsible for annual ryegrass ...
DOI:
10.1094/PD-90-0229

7. First report of angular leaf spot caused by Phaeoisariopsis griseola on Phaseolus coccineus in Argentina

Author:
Stenglein, S.A.; Balatti, P.A.; Vizgarra, O.N.; Ploper, L.D.
Source:
Plant disease 2006 v.90 no.2 pp. 248
ISSN:
0191-2917
Subject:
Phaeoisariopsis griseola; beans; Phaseolus coccineus; fungal diseases of plants; host plants; new host records; leaf spot; pathogen identification; pathogenicity; plant pathogenic fungi; fungal anatomy; new geographic records; Argentina
DOI:
10.1094/PD-90-0248B

8. First report of a 16SrVI group phytoplasma associated with witches'-broom disease on Withania somnifera

Author:
Samad, A.; Shasany, A.K.; Gupta, S.; Ajayakuar, P.V.; Darokar, M.P.; Khanuja, S.P.S.
Source:
Plant disease 2006 v.90 no.2 pp. 248
ISSN:
0191-2917
Subject:
sequence alignment; ribosomal DNA; Withania somnifera; host plants; phytoplasmal diseases; medicinal plants; new host records; pathogen identification; 16SrVI (Clover proliferation group); witches' broom; new geographic records; India
DOI:
10.1094/PD-90-0248A

9. First report of bacterial leaf spot of Italian dandelion (Cichorium intybus) caused by a Pseudomonas syringae pathovar in California

Author:
Koike, S.T.; Bull, C.T.
Source:
Plant disease 2006 v.90 no.2 pp. 245
ISSN:
0191-2917
Subject:
plant pathogenic bacteria; chicory; host plants; vegetable crops; bacterial diseases of plants; leaf spot; Pseudomonas syringae; pathogen identification; pathogenicity; DNA fingerprinting; Cichorium intybus; California
DOI:
10.1094/PD-90-0245A

10. First report of Leifsonia xyli subsp. xyli, causal agent of ratoon stunting of sugarcane, in Jamaica

Author:
Falloon, T.; Henry, E.; Davis, M.J.; Fernandez, E.; Girard, J.C.; Rott, P.; Daugrois, J.H.
Source:
Plant disease 2006 v.90 no.2 pp. 245
ISSN:
0191-2917
Subject:
ratoon stunting disease; disease diagnosis; Leifsonia xyli subsp. xyli; plant pathogenic bacteria; ribosomal DNA; sequence analysis; pathogen identification; Saccharum officinarum; sugarcane; host plants; new geographic records; Jamaica
DOI:
10.1094/PD-90-0245B

11. First report of Puccinia puta on Ipomoea carnea subsp. fistulosa from Puerto Rico

Author:
Hernandez, J.R.
Source:
Plant disease 2006 v.90 no.2 pp. 245
ISSN:
0191-2917
Subject:
rust diseases; ornamental plants; Ipomoea carnea; leaf spot; Puccinia; pathogen identification; plant pathogenic fungi; fungal anatomy; new geographic records; Puerto Rico
DOI:
10.1094/PD-90-0245C

12. Genetic analysis of partial resistance to powdery mildew in bread wheat line Saar

Author:
Lillemo, M.; Skinnes, H.; Singh, R.P.; Ginkel, M. van
Source:
Plant disease 2006 v.90 no.2 pp. 225-228
ISSN:
0191-2917
Subject:
plant genetics; host-pathogen relationships; host plants; Blumeria graminis f. sp. tritici; powdery mildew; wheat; Triticum aestivum; plant pathogenic fungi; disease resistance; inbred lines
Abstract:
... Powdery mildew, caused by Blumeria graminis (syn. Erysiphe graminis) f. sp. tritici, is an important disease of bread wheat (Triticum aestivum) in many countries. The CIMMYT bread wheat line Saar has exhibited a high level of partial resistance to powdery mildew in field trials conducted in Europe, Asia, and South America, and represents a valuable source of resistance in wheat breeding. A set of ...
DOI:
10.1094/PD-90-0225

13. Genetic and pathogenic variation in Phytophthora cactorum affecting fruit and nut crops in California

Author:
Bhat, R.G.; Colowit, P.M.; Tai, T.H.; Aradhya, M.K.; Browne, G.T.
Source:
Plant disease 2006 v.90 no.2 pp. 161
ISSN:
0191-2917
Subject:
plant rots; Phytophthora cactorum; Phytophthora; plant pathogenic fungi; genome; amplified fragment length polymorphism; genetic variation; pathogenicity; metalaxyl; fungicide resistance; host specificity; Fragaria ananassa; strawberries; fruit crops; Prunus dulcis; almonds; Juglans; walnuts; nut crops; California
Abstract:
... Isolates of Phytophthora cactorum and 15 other species of Phytophthora were characterized according to their genomic DNA, pathogenicity, and sensitivity to mefenoxam. Amplified fragment length polymorphism (AFLP) analysis was completed for 132 isolates of P. cactorum (30 from almond, 86 from strawberry, 5 from walnut, and 11 from other hosts) and 22 isolates of 15 other Phytophthora spp. from vari ...
Handle:
10113/1298
DOI:
10.1094/PD-90-0161

14. Genetic diversity among Ophiosphaerella agrostis strains causing dead spot in creeping bentgrass

Author:
Kaminski, J.E.; Dernoeden, P.H.; Mischke, S.; O'Neill, N.R.
Source:
Plant disease 2006 v.90 no.2 pp. 146
ISSN:
0191-2917
Subject:
fungal diseases of plants; Pleosporales; plant pathogenic fungi; genetic variation; genetic polymorphism; DNA fingerprinting; amplified fragment length polymorphism; Agrostis stolonifera; Cynodon dactylon; Cynodon transvaalensis; Agrostis canina; turf grasses; host plants
Abstract:
... Dead spot (Ophiosphaerella agrostis) is a relatively new disease of young creeping bentgrass and hybrid bermudagrass putting greens in the United States. Little is known about the biology or genetic diversity of the pathogen. O. agrostis is unusual in that it produces prodigious numbers of pseudothecia in the field throughout the summer months and has no known asexual state. A total of 77 O. agros ...
Handle:
10113/192
DOI:
10.1094/PD-90-0146

15. Host resistance to Mirafiori lettuce big-vein virus and Lettuce big-vein associated virus and virus sequence diversity and frequency in California

Author:
Hayes, R.J.; Wintermantel, W.M.; Nicely, P.A.; Ryder, E.J.
Source:
Plant disease 2006 v.90 no.2 pp. 233
ISSN:
0191-2917
Subject:
Lettuce big-vein associated virus; plant viruses; coat proteins; genetic variation; disease resistance; disease incidence; disease severity; Lactuca sativa; lettuce; host plants; California
Abstract:
... Big vein is an economically damaging disease of lettuce (Lactuca sativa) caused by the Olpidium brassicae-vectored Mirafiori lettuce big-vein virus (MLBVV). Lettuce big-vein associated virus (LBVaV) is also frequently identified in symptomatic plants, but no causal relationship has been demonstrated. Although big vein is a perennial problem in the United States, the extent of MLBVV and LBVaV infec ...
Handle:
10113/1299
DOI:
10.1094/PD-90-0233

16. Incidence, spatial patterns, and associations among viruses in snap bean and alfalfa in New York

Author:
Shah, D.A.; Dillard, H.R.; Mazumdar-Leighton, S.; Gonsalves, D.; Nault, B.A.
Source:
Plant disease 2006 v.90 no.2 pp. 203
ISSN:
0191-2917
Subject:
Alfalfa mosaic virus; Cucumber mosaic virus; Bean yellow mosaic virus; Clover yellow vein virus; plant viruses; disease incidence; spatial distribution; disease diagnosis; pathogen identification; Phaseolus vulgaris; green beans; Medicago sativa; alfalfa; host plants; planting date; New York
Abstract:
... Recent epidemics in snap bean (Phaseolus vulgaris) characterized by virus-like symptoms prompted a survey of commercial fields for Alfalfa mosaic virus (AMV), Cucumber mosaic virus (CMV), and the Bean yellow mosaic virus (BYMV)/Clover yellow vein virus (ClYVV) complex in 2002 and 2003. Snap bean fields were either remote from or adjacent to alfalfa (Medicago sativa), a putative source of these vir ...
Handle:
10113/2912
DOI:
10.1094/PD-90-0203

17. Infection of rice seed grown in Arkansas by Pyricularia grisea and transmission to seedlings in the field

Author:
Guerber, C.; TeBeest, D.O.
Source:
Plant disease 2006 v.90 no.2 pp. 170-176
ISSN:
0191-2917
Subject:
seedling diseases; cultivars; disease detection; blast disease; rice; seed germination; testa; Oryza sativa; seedlings; disease transmission; plant pathogenic fungi; seed-borne fungi; Magnaporthe grisea; genetic variation; Arkansas
Abstract:
... Rice blast, caused by Pyricularia grisea, is an important and serious disease of rice (Oryza sativa) in the southeastern United States. The disease sporadically reaches epidemic proportions on susceptible cultivars within fields and over large areas within Arkansas. The main overwintering sources of inoculum reportedly include infected rice stubble, related host species, and infected seed. The obj ...
DOI:
10.1094/PD-90-0170

18. Major gene resistance to blackleg in Brassica napus overcome within three years of commercial production in Southeastern Australia

Author:
Sprague, S.J.; Marcroft, S.J.; Hayden, H.L.; Howlett, B.J.
Source:
Plant disease 2006 v.90 no.2 pp. 190-198
ISSN:
0191-2917
Subject:
plant genetics; canola; stem cankers; Plenodomus lingam; host-pathogen relationships; fungal diseases of plants; host plants; disease severity; pathogenicity; plant pathogenic fungi; disease resistance; introgression; Brassica napus var. napus; Brassica rapa subsp. oleifera; disease incidence; New South Wales; South Australia; Victoria (Australia)
Abstract:
... The infection by Leptosphaeria maculans of Brassica napus cultivars with major gene resistance derived from Brassica rapa subsp. sylvestris was studied in southeastern Australia. Following the commercial release of these cultivars in Australia in 2000, plants with stem cankers were first reported in 2002 at two geographically isolated regions in South Australia and New South Wales. In 2003, this s ...
DOI:
10.1094/PD-90-0190

19. Molecular characterization of a begomovirus associated with tomato leaf curl disease in Uganda

Author:
Shih, S.L.; Green, S.K.; Tsai, W.S.; Ssekyewa, C.
Source:
Plant disease 2006 v.90 no.2 pp. 246
ISSN:
0191-2917
Subject:
plant viruses; tomatoes; Begomovirus; sequence alignment; genome; host plants; pathogen identification; Solanum lycopersicum var. lycopersicum; Uganda
DOI:
10.1094/PD-90-0246A

20. Molecular characterization of pepper yellow leaf curl Indonesia virus in leaf curl and yellowing diseased tomato and pepper in Indonesia

Author:
Tsai, W.S.; Shih, S.L.; Green, S.K.; Rauf, A.; Hidayat, S.H.; Jan, F.J.
Source:
Plant disease 2006 v.90 no.2 pp. 247
ISSN:
0191-2917
Subject:
plant viruses; tomatoes; sequence alignment; Capsicum annuum; DNA; host plants; pathogen identification; peppers; Pepper leaf curl virus; new geographic records; Solanum lycopersicum var. lycopersicum; Indonesia
DOI:
10.1094/PD-90-0247B