Biology and Management of Early Dying of Potatoes

Powelson, M. L.; Rowe, R. C.

doi:10.1146/annurev.py.31.090193.000551

Cited by 143 publications

(27 citation statements)

References 21 publications

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“…The two most notorious species are V. dahliae and V. albo-atrum, which cause billions of dollars in annual crop losses worldwide (109). Yield losses in potato crops may reach 50%, but are more commonly in the range of 10-15% (114,124,125), whereas in lettuce, losses can easily reach 100% (150). The soil habitat of these species, the ability of their survival structures to persist for years, and their capacity to infect a bewildering array of hosts make them chronic economic problems in crop production.…”

Section: Introductionmentioning

confidence: 99%

Diversity, Pathogenicity, and Management of Verticillium Species

Klosterman

Atallah

Vallad

et al. 2009

Annu. Rev. Phytopathol.

610

564

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The genus Verticillium encompasses phytopathogenic species that cause vascular wilts of plants. In this review, we focus on Verticillium dahliae, placing emphasis on the controversy surrounding the elevation of a long-spored variant as a new species, recent advances in the analysis of compatible and incompatible interactions, highlighted by the use of strains expressing fluorescent proteins, and the genetic diversity among Verticillium spp. A synthesis of the approaches to explore genetic diversity, gene flow, and the potential for cryptic recombination is provided. Control of Verticillium wilt has relied on a panoply of chemical and nonchemical strategies, but is beset with environmental or site-specific efficacy problems. Host resistance remains the most logical choice, but is unavailable in most crops. The genetic basis of resistance to Verticillium wilt is unknown in most crops, as are the subcellular signaling mechanisms associated with Ve-mediated, race-specific resistance. Increased understanding in each of these areas promises to facilitate management of Verticillium wilts across a broad range of crops.

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Section: Introductionmentioning

confidence: 99%

Diversity, Pathogenicity, and Management of Verticillium Species

Klosterman

Atallah

Vallad

et al. 2009

Annu. Rev. Phytopathol.

610

564

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“…utility of this practice in reducing Verticillium dahliae inoculum and subsequent disease intensity has been equivocal (12,25). Microsclerotia of V. dahliae survive in the soil up to 10 years, and the extensive host range (including both crops and weeds) and lack of host specificity (26) reduce the usefulness of some crop rotations for Verticillium wilt management (15).…”

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confidence: 99%

Management of Soilborne Diseases in Strawberry Using Vegetable Rotations

et al. 2007

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The influence of crop rotation on soilborne diseases and yield of strawberry (Fragaria × ananassa) was determined at a site infested with Verticillium dahliae microsclerotia and at another with no known history of V. dahliae infestation during 1997 to 2000. The rotations studied at the V. dahliae-infested site were (i) broccoli-broccoli-strawberry, (ii) Brussels sprouts-strawberry, and (iii) lettuce-lettuce-strawberry; the treatments at the site with no history of V. dahliae were (i) broccoli-broccoli-strawberry, (ii) cauliflower-cauliflower-strawberry, and (iii) lettuce-lettuce-strawberry. The effects of rotation on V. dahliae and Pythium populations, strawberry vigor, Verticillium wilt severity, and strawberry fruit yield were compared with a standard methyl bromide + chloropicrin fumigated control treatment at both sites. Rotations did not alter total population levels of Pythium spp. at either study site. However, V. dahliae microsclerotia were significantly reduced with br occoli and Brussels sprouts rotations compared with lettuce rotations at the V. dahliae-infested site. Reduced propagules led to lower Verticillium wilt severity on strawberry plants in the broccoli and Brussels sprouts rotations than in lettuce-rotated plots. Strawberry vigor and fruit yield were significantly lower in lettuce-rotated plots than in broccoli- and Brussels sprouts-rotated plots. Despite no detectable microsclerotia at the other site, strawberry vigor and fruit yield were greatest in plots rotated with broccoli, intermediate with cauliflower, and lowest with lettuce. None of the rotation treatments were better than the fumigated control for all variables measured. In the absence of fumigation, rotation with broccoli and Brussels sprouts is an effective cultural practice for managing Verticillium wilt in strawberry production; whereas, in fields with no detectable V. dahliae, broccoli is also a feasible rotational crop that enhances strawberry growth and yield. According to a cost-benefit analysis, the broccoli-strawberry rotation system could be an economically viable option provided growers are able to alternate years for strawberry cultivation.

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“…It usually involves a combination of cultural practices aimed at minimizing the disease, such as crop rotation, manipulation of fertility and irrigation, with the planting of pathogen-free seeds or stock, and the use of available resistant cultivars and sometimes pre-plant soil treatments, such as soil fumigation or solarization, so as to reduce microsclerotia viability in soil (Powelson and Rowe, 1993;Jeger et al, 1996).…”

Section: Discussionmentioning

confidence: 99%

Efficacy of seaweed concentrate from Ecklonia maxima (Osbeck) and conventional fungicides in the control of Verticillium wilt of pepper

et al. 2010

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SUMMARYIn order to control the causal agent of Verticillium wilt of pepper (Verticillium dahliae), the efficacy of two conventional fungicides, thiophanate-methyl and carbendazim, and seaweed concentrate (SWC) from Ecklonia maxima was evaluated in greenhouse conditions. Pepper plants were inoculated with selected V. dahliae isolate in the stage of more than nine fully developed leaves on primary stem. The tested fungicides and SWC were applied three days before inoculation of pepper plants. Carbendazim was the most efficient fungicide among tested substances (69.64%). SWC proved to be more effective when applied at 1.0% concentarion (41.96%). The use of thiophanate-methyl provided good Verticillium wilt control in pepper (60.71%). SWC was less efficient than thiophanate-methyl and carbendazim, but still significantly better compared to the disease control plot.

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Biology and Management of Early Dying of Potatoes

Cited by 143 publications

References 21 publications

Diversity, Pathogenicity, and Management of Verticillium Species

Diversity, Pathogenicity, and Management of Verticillium Species

Management of Soilborne Diseases in Strawberry Using Vegetable Rotations

Efficacy of seaweed concentrate from Ecklonia maxima (Osbeck) and conventional fungicides in the control of Verticillium wilt of pepper

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