Effects of crop rotation and removal of crop debris on the soil population of two isolates of <i>Verticillium dahliae</i>

Mol, L.; Schölte, K.; Vos, J.

doi:10.1111/j.1365-3059.1995.tb02666.x

Cited by 27 publications

(12 citation statements)

References 16 publications

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“…This study demonstrates that microsclerotia can survive in infested peanut residue and then can infect susceptible cotton in the next season. Root exudates stimulate germination of microsclerotia leading to a decline in the population of viable propagules in soil until the incorporation of new inoculum from infected tissues at the end of the crop [16,23]. Inoculum potential is related to the density and distribution of infested residues as well as to the susceptibility of the host crop [2].…”

Section: Discussionmentioning

confidence: 99%

“…Inoculum density in soil at planting has been shown to play a critical role in disease development [14]. Production of V. dahliae microsclerotia on infected plant parts of many field crops has been found [15,16]. Formation of microsclerotia on dying host debris in the soil can cause an increase in inoculum density in the following year, especially if the increase is greater than the reduction in microsclerotia due to mortality [15,16].…”

Section: Introductionmentioning

confidence: 99%

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Influence ofVerticillium dahliaeInfested Peanut Residue on Wilt Development in Subsequent Cotton

Chawla

Woodward

Wheeler

2012

International Journal of Agronomy

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Texas ranks first in cotton production in the United States and accounts for approximately 40% of the total production. Most of the cotton production is concentrated in the Texas High Plains where cotton and peanut are commonly grown in rotation. With peanut being a legume crop, farmers routinely leave residue on the soil surface to improve soil fertility; however,V. dahliaecan survive in the crop residue contributing inoculum to the soil. A microplot study was conducted to investigate the impact of peanut residue infested withV. dahliaeon subsequent microsclerotia density in soil and Verticillium wilt development in cotton. The effects of infested peanut residue rate on percent germination of cotton seeds and on wilt incidence were monitored in 2008 and 2009. In both years microplots were planted with a susceptible cotton cultivar, Stoneville (ST) 4554B2RF. Increasing infested peanut residue rate was positively correlated with wilt incidence in cotton and negatively correlated with germination of cotton seeds. Density of microsclerotia in the soil increased significantly with increasing rates of infested peanut residue over time. Results indicate infested peanut residue serve as a source ofV. dahliaeinoculum, and removing infested residue can reduce disease development in subsequent cotton crops.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence ofVerticillium dahliaeInfested Peanut Residue on Wilt Development in Subsequent Cotton

Chawla

Woodward

Wheeler

2012

International Journal of Agronomy

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“…Potato haulms are the most important source of V. dahliae microsclerotia. Hence, the soil inoculum level of V. dahliae can be influenced by incorporating or removing haulms [20].…”

Section: Justification Of Treatmentsmentioning

confidence: 99%

“…Each year, in the second week of August, 20 randomly chosen plants of the potato test crop were harvested, five from each of the inner four rows of each plot. A transverse section of 1-2 mm thickness was cut from the middle of each haulm piece, and eight sections per dish were placed on a selective medium in Petri dishes and incubated for two weeks [20]. Colonies of V. dahliae were counted using a stereo dissecting microscope.…”

Section: Haulm Infections With V Dahliae and Rmentioning

confidence: 99%

Multimodel Inference for the Prediction of Disease Symptoms and Yield Loss of Potato in a Two-Year Crop Rotation Experiment

Berg¹,

Vos

Grasman

2012

International Journal of Agronomy

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The second order Akaike information criterion was used for the assessment of 139 regression models for three responses of potato test crops: (a) incidence of Spongospora subterranea on the harvested tubers, (b) percentage of haulms infected with Verticillium dahliae, and (c) tuber yield. Six variables that are likely related to the response variables were taken into consideration: soil infestations of the fungus Verticillium dahliae and of three nematode species (Globodera pallida, Trichodoridae, and Meloidogyne spp.) and, furthermore, soil pH and water soluble phosphor (P). Interactions between V. dahliae and the three nematode species were included as well. Based on multimodelling, predictors are given a weight from which one may decide about the need to include them in a prediction of crop yield. The most important predictors were soil infestation levels of V. dahliae and G. pallida and soil pH. The outcome also showed that tubers suffered more from S. subterranea for higher soil pH values. Finally, yield reduction from the presence of V. dahliae was enhanced by the presence of higher densities of G. pallida.

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“…microsclerotia in soil and the incidence of Verticillium wilt on subsequent cauliflower (B. oleracea L. var. botrytis L.) crops (18,25,26,30). Broccoli and other crucifers are recognized as good candidates for disease suppression in crop rotations because of their innate glucosinolate content (13,14,16).…”

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confidence: 99%

Effects of Broccoli Rotation on Lettuce Drop Caused by Sclerotinia minor and on the Population Density of Sclerotia in Soil

Hao

Subbarao

Koike³

2003

Plant Disease

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Field experiments were conducted at Spence Road site and at the Hartnell College East Campus site in Salinas, CA, to determine the effects of crop rotation with broccoli or a fallow period on lettuce drop caused by Sclerotinia minor and the density of pathogen sclerotia in the soil. Treatments at the Spence Road site with low inoculum density (<7 sclerotia per 100 cm3 of soil) distributed randomly included: successive crops of lettuce (LLL), lettuce rotated with broccoli (LBL), and lettuce followed by a fallow period (LFL). Treatments at the Hartnell site with high inoculum density (>7 sclerotia per 100 cm3 of soil) distributed uniformly included: continuous lettuce (LLLL), broccoli-lettuce-broccoli-lettuce (BLBL), broccoli-broccoli-lettuce-lettuce (BBLL), and fallow-lettuce-fallow-lettuce (FLFL). At the Spence Road site, continuous lettuce did not increase lettuce drop incidence for at least 2 years, although an increase in soilborne sclerotia was observed annually but was below the threshold at which a correlation between inoculum density and disease incidence is observed. Rotation with broccoli resulted in small reductions in disease incidence only in the first year. The density of sclerotia was lowest in the LFL treatment, and the highest in the LLL. At the Hartnell site, rotation with broccoli significantly reduced both sclerotia and lettuce drop incidence. The number of broccoli crops rather than the sequence of lettuce rotations with broccoli was critical for reducing the numbers of S. minor sclerotia in soil. Fallowing after a lettuce crop resulted in marginal reductions in sclerotia and lettuce drop incidence. Viability of recovered sclerotia was not significantly different between treatments, although differences between seasons were detected. Results suggest that rotations with broccoli can be a practical lettuce drop management strategy.

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Effects of crop rotation and removal of crop debris on the soil population of two isolates of Verticillium dahliae

Cited by 27 publications

References 16 publications

Influence ofVerticillium dahliaeInfested Peanut Residue on Wilt Development in Subsequent Cotton

Influence ofVerticillium dahliaeInfested Peanut Residue on Wilt Development in Subsequent Cotton

Multimodel Inference for the Prediction of Disease Symptoms and Yield Loss of Potato in a Two-Year Crop Rotation Experiment

Effects of Broccoli Rotation on Lettuce Drop Caused by Sclerotinia minor and on the Population Density of Sclerotia in Soil

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