Bacteria associated with tarnished plant bug stem lesions on hybrid poplars in Ontario

Juzwik, Jennifer; Hubbes, M.

doi:10.1111/j.1439-0329.1986.tb00207.x

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…In contrast, some strains of Erwinia spp. were associated with canker disease of hybrid poplar in Canada (M osseler and H ubbes 1983; J uzwick and H ubbes 1986).…”

Section: Introductionmentioning

confidence: 99%

Newly recognized bacteria involved in trunk scab and canker of white and hybrid poplars

et al. 2008

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In a 4-year-old collection of native Italian Populus alba, growing in the eastern Po valley, many trunks showed severe symptoms characterized by brown spots, similar to trunk scab and ⁄ or by cankers. Canker-like growths, often with gall-like-formations in the earlier developmental phases were also found on some clones of P. trichocarpa and their hybrids, as well as on P. deltoides growing in several Northern Italian nurseries. Bacteria and fungi present in the affected tissues and potentially involved in the disease were examined. No fungi were detected, however, several species of bacteria were isolated and identified: Pseudomonas mendocina and Erwinia herbicola group, from the brown spots; Erwinia carotovora sub sp. carotovora and, occasionally, E. herbicola group, from cankers. Only E. carotovora sub sp. carotovora produced clear symptoms of canker when artificially inoculated on young plants of different poplar species. This is the first time this symptomology on poplar species has been clearly related to E. carotovora sub sp. carotovora.

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“…In contrast, some strains of Erwinia spp. were associated with canker disease of hybrid poplar in Canada (M osseler and H ubbes 1983; J uzwick and H ubbes 1986).…”

Section: Introductionmentioning

confidence: 99%

Newly recognized bacteria involved in trunk scab and canker of white and hybrid poplars

et al. 2008

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Lygus lineolaris (tarnished plant bug)

2021

CABI Compendium

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Black stem galls on aspen: anatomy and histochemistry

Crane¹,

Hiratsuka²,

Blenis³

1995

Can. J. Bot.

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Large black stem galls occur sporadically on trembling aspen (Populus tremuloides) in western Canada. Although little is known about their cause or structure, trees having these galls are less likely than surrounding aspen to have advanced decay caused by the fungus Phellinus tremulae. The anatomy and histochemistry of black galls and associated branch galls were studied and compared with normal wood and bark. Light microscopy showed that the cambium of black galls produces greater numbers of cells per growth ring and that growth rings are two to three times wider than normal. Vessel elements and fibers are unusually small and misshapen. Gall xylem has characteristics associated with wounding or infection: ray cells filled with phenolic deposits, and vessel elements occluded by tyloses and granular material. Frequent radial strands of undifferentiated callus tissue surrounded by necrophylactic periderms indicate sites of cambial damage of unknown cause. White areas within dark-colored gall xylem of some samples were free of most of these abnormalities, suggesting that a persistent agent is required for continuing tumor growth. Thickened outer bark harbored a variety of saprophytic fungi, especially hyphomycetes. Surface and internal morphology of black galls was also compared with similar stem galls caused by poplar budgall mites (Aceria parapopuli) and was found to be different. Bacteria, fungi, or mites were not obvious within living tissue, and further studies are necessary to determine the etiology of black galls. Key words: Populus tremuloides, poplar, black gall, wood anatomy.

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Bacteria associated with tarnished plant bug stem lesions on hybrid poplars in Ontario

Cited by 3 publications

References 7 publications

Newly recognized bacteria involved in trunk scab and canker of white and hybrid poplars

Newly recognized bacteria involved in trunk scab and canker of white and hybrid poplars

Lygus lineolaris (tarnished plant bug)

Black stem galls on aspen: anatomy and histochemistry

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