W. Luo
North Carolina State University
Integrated pest managementEcologyPest controlBotanyBiology
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Publications 28
#1Mark E. Hilf (ARS: Agricultural Research Service)H-Index: 20
#2W. Luo (NCSU: North Carolina State University)H-Index: 9
#1T. R. Gottwald (USDA: United States Department of Agriculture)H-Index: 9
#2Gavin H. Poole (USDA: United States Department of Agriculture)H-Index: 4
Last. Earl Taylor (USDA: United States Department of Agriculture)H-Index: 1
view all 14 authors...
Early detection and rapid response are crucial to avoid severe epidemics of exotic pathogens. However, most detection methods (molecular, serological, chemical) are logistically limited for large-scale survey of outbreaks due to intrinsic sampling issues and laboratory throughput. Evaluation of 10 canines trained for detection of a severe exotic phytobacterial arboreal pathogen, Candidatus Liberibacter asiaticus (CLas), demonstrated 0.9905 accuracy, 0.8579 sensitivity, and 0.9961 specificity. In...
2 CitationsSource
#1Colmar A. Serra (RAFAEL: Rafael Advanced Defense Systems)H-Index: 1
#2Cindy L. McKenzie (ARS: Agricultural Research Service)H-Index: 20
Last. Lance S. Osborne (UF: University of Florida)H-Index: 21
view all 4 authors...
MED was detected for the first time in the Dominican Republic from 2 provinces (Santo Domingo and Santiago), 2 host plants (tomato and tobacco), and 2 environments (greenhouse and open field). All MED sequences were identical and determined to be of Eastern Mediterranean origin. MEAM1 was the predominant B. tabaci cryptic species present, and was detected in all but 1 sample, which was 100% MED. NW was detected twice on eggplant in different geographical regions, and once on Mexican prickly popp...
#1Neil McRoberts (UC Davis: University of California, Davis)H-Index: 19
#2Sara Garcia Figuera (UC Davis: University of California, Davis)H-Index: 1
Last. Tim R. Gottwald (USDA: United States Department of Agriculture)H-Index: 34
view all 7 authors...
We describe a series of operational questions posed during the state-wide response in California to the arrival of the invasive citrus disease Huanglongbing. The response is coordinated by an elect...
3 CitationsSource
#1Tim R. Gottwald (USDA: United States Department of Agriculture)H-Index: 34
#2W. Luo (NCSU: North Carolina State University)H-Index: 9
Last. Frank J. Louws (NCSU: North Carolina State University)H-Index: 22
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International travel offers an extensive network for new and recurring human-mediated introductions of exotic infectious pathogens and biota, freeing geographical constraints. We present a predicti...
2 CitationsSource
‘Candidatus Liberibacter asiaticus’ is a phloem-colonizing intracellular bacterial pathogen of citrus associated with the disease huanglongbing. A study of patterns of colonization and bacterial population growth in new growth of different citrus types was conducted by pruning infected citron, sweet orange, sour orange, mandarin, citrange, and Citrus macrophylla trees to force the growth of axillary and adventitious shoots. The first three leaves on newly emerged shoots were collected at 30, 60,...
2 CitationsSource
#1Fang Ding (HAU: Huazhong Agricultural University)H-Index: 5
#2Victoria Allen (ARS: Agricultural Research Service)H-Index: 2
Last. Yongping Duan (ARS: Agricultural Research Service)H-Index: 20
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Huanglongbing (HLB), a destructive plant bacterial disease, severely impedes worldwide citrus production. In our previous reports, we revealed the molecular mechanisms of host plant responses that underlie thermotherapy against HLB. In this study, we investigated the molecular mechanism underlying heat or tetracycline treatments on the HLB bacterium, ‘Candidatus Liberibacter asiaticus’ (Las) by focusing on Las prophage/phage conversion under stress conditions. By comparing the prophage FP1 and F...
3 CitationsSource
#1Melissa M DoudH-Index: 1
#2Yungsheng WangH-Index: 1
Last. Yongping DuanH-Index: 20
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Simply exposing Huanglongbing-affected citrus trees to solar-generated high temperatures using plastic greenhouses revitalized them. A destructive bacterial disease of citrus trees, Huanglongbing is spreading globally and threatening the multibillion-dollar citrus industry in the US. No effective way has been found to treat diseased trees in the field. Now, Yongping Duan of United States Department of Agriculture and co-workers have discovered that many diseased trees exhibited vigorous new grow...
7 CitationsSource
#1Greg McCollum (USDA: United States Department of Agriculture)H-Index: 11
#2Mark E. Hilf (USDA: United States Department of Agriculture)H-Index: 20
Last. Tim R. Gottwald (ARS: Agricultural Research Service)H-Index: 34
view all 5 authors...
Huanglongbing (HLB) disease is the most serious threat to citrus production worldwide and, in the last decade, has devastated the Florida citrus industry. In the United States, HLB is associated with the phloem-limited α-proteobacterium ‘Candidatus Liberibacter asiaticus’ and its insect vector, the Asian citrus psyllid (ACP; Diaphorina citri). Significant effort is being put forth to develop novel citrus germplasm that has a lower propensity to succumb to HLB than do currently available varietie...
5 CitationsSource
#1W. LuoH-Index: 9
#2T. R. GottwaldH-Index: 13
Last. Mike IreyH-Index: 12
view all 4 authors...
Invasive plant diseases can have devastating consequences on the local plant populations, in both agricultural and natural landscapes. Knowledge of the spatial patterns of pathogen spread can be used to guide more time- and cost-effective disease management strategies. Based on disease dispersal principles and consideration of host pattern, an improved plant disease epidemiological model was developed and tested for plant disease mapping. The model is able to characterize the disease dispersal g...