Influence of continuous cropping on severity of common root rot in wheat and barley

Conner, Robert L.; Atkinson, T. G.

doi:10.1080/07060668909501126

Cited by 20 publications

(7 citation statements)

References 17 publications

(21 reference statements)

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“…These results are similar to those found in previous studies conducted on the Canadian prairies (Conner and Atkinson 1989;Bailey et al 1992;Fernandez et al 1998a). On the other hand, leaf spot disease severity (tan spot) generally increased with conservation tillage practices in Oklahoma (Schuh 1990).…”

Section: Spring Wheatsupporting

confidence: 83%

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Impact of agronomic practices and environment on diseases of wheat and lentil in southeastern Saskatchewan

Bailey¹,

Gossen²,

Derksen³

et al. 2000

Can. J. Plant Sci.

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. 2000. Impact of agronomic practices and environment on diseases of wheat and lentil in southeastern Saskatchewan. Can. J. Plant Sci 80: 917-927. To determine the effect of tillage and rotation on plant diseases, their severity and prevalence were monitored on spring wheat, lentil, and field pea grown in rotation with zero and conventional tillage at Indian Head, SK, from 1992 to 1995. Root disease severity of wheat was less under zero tillage than conventional tillage, but leaf spot severity was unchanged. Incidence of the causal agents from roots was variable, such that Fusarium spp. were higher under zero tillage than conventional and Bipolaris sorokiniana was lower. Pyrenophora triticirepentis was the only foliar pathogen more prevalent under zero tillage than conventional. Rotation did not affect the pathogens causing root disease. However, the rotation of canaryseed-sunola-wheat-lentil had higher disease severity and levels of Septoria tritci on wheat compared with wheat-canola-wheat-lentil or wheat-pea-wheat-lentil. Neither crop rotation nor tillage practice had a measurable impact on lentil diseases, but epidemics of Ascochyta lentis and Botrytis cinerea were most severe in treatments with the densest plant stands. Multivariate analyses explored trends of tillage, rotation, and environment over years demonstrating that regardless of tillage or crop rotation practices, the annual environment was the most important factor limiting the severity of disease and the prevalence of causal agents in the complex. Les affections racinaires du blé étaient moins graves en régime SD qu'en régime TC, mais on ne notait pas de différences comparables pour les taches foliaires. La fréquences des pathogènes prélevés sur les racines était variable, celle des Fusarium spp., par exemple, était plus forte et celle de Bipolaris sorokiniana plus basse en régime SD. Pyrenophora tritici-repentis était le seul pathogène foliaire plus abondant en régime SD. Le type de rotation des cultures n'avait pas d'effet sur les pathogènes racinaires, bien que la rotation alpiste des Canaries-sunola-blé-lentille manifestait un niveau plus élevé de gravité et d'étendue des infections à Septoria tritci sur le blé que les rotations blé-canola-blé-lentille ou blé-pois-blé-lentille. Ni la rotation ni le régime de travail du sol n'avait d'effet mesurable sur les maladies de la lentille, mais les épidémies d'Ascochyta lentis et de Botrytis cinerea étaient le plus graves dans les cultures présentant une plus forte densité de peuplement. Les analyses multivariées de l'évolution des pratiques du travail du sol, des rotations et des conditions du milieu au cours des années ont permis de constater que ces dernières constituent le facteur limite le plus important de la gravité des maladies et l'abondance relative de tel ou tel pathogène dans les cultures.

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Section: Spring Wheatsupporting

confidence: 83%

“…Long-term changes in crop management are often associated with substantial changes in root pathogen populations. For example, the severity of common root rot of cereals declines under reduced tillage (Conner and Atkinson 1989;Bailey et al 1992), but take-all and pythium root rot increase (Cook and Haglund 1991).…”

mentioning

confidence: 99%

Impact of agronomic practices and environment on diseases of wheat and lentil in southeastern Saskatchewan

Bailey¹,

Gossen²,

Derksen³

et al. 2000

Can. J. Plant Sci.

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“…However, several recent studies indicate that tillage management may have a smaller impact on plant diseases in the northern Great Plains regions of Canada and the USA. In Canada, foliar disease severity on wheat, barley, pea, and lentil was not affected by tillage practices (Kharbanda et al 1995;Turkington et al 1996Turkington et al , 1998Fernandez et al 1999;Bailey et al 1992Bailey et al , 2000a, and root disease of cereals declined slightly (Conner and Atkinson 1989;Bailey et al 1992).…”

mentioning

confidence: 99%

Effect of tillage and crop rotation on root and foliar diseases of wheat and pea in Saskatchewan from 1991 to 1998: Univariate and multivariate analyses

Bailey¹,

Gossen²,

Lafond³

et al. 2001

Can. J. Plant Sci.

110

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. 2001. Effect of tillage and crop rotation on root and foliar diseases of wheat and pea in Saskatchewan from 1991 to 1998: Univariate and multivariate analyses. Can. J. Plant Sci. 81: 789-803. Disease severity and incidence of fungal species on wheat and pea were evaluated under zero, minimum, and conventional tillage in three rotations with increasing broad-leaved crop diversity from 1991 to 1998 at Indian Head, SK. The objective was to determine whether differences in crop rotation and crop residue at the soil surface would increase crop disease problems. Rotation and tillage had little impact on disease relative to the environment. Reduced tillage did not substantially increase disease severity from leaf spot diseases of wheat or on diseases of field pea. However, the relative importance of root pathogens of wheat was affected; under reduced tillage Bipolaris sorokiniana and Gaeumannomyces graminis decreased, but Fusarium spp. increased on wheat roots. These changes did not affect overall root severity or yield. Rotations had limited impact on wheat disease severity and the prevalence of fungal species, but wheat grown in diversified crop rotations using cereal, pea and flax had consistently higher yields than wheat following wheat. Growing wheat after summerfallow or pea reduced foliar diseases of wheat compared with wheat after wheat. Increased crop diversity in rotations reduced populations of B. sorokiniana, Septoria tritici, and Stagonospora nodorum in wheat leaves and roots, but growing wheat after flax increased the incidence of Fusarium spp. in wheat roots. Les auteurs ont évalué la gravité des maladies cryptogamiques et l'incidence des espèces de cryptogames sur le blé et le pois. Les deux espèces ont été cultivées en trois régimes d'assolement sans travail, avec travail minimal et avec travail normal du sol de 1991 à 1998, à Indian Head, en Saskatchewan. Durant cette période, on a progressivement accru la diversité des cultures latifoliées. Le but de l'expérience était de déterminer si une modification du régime d'assolement et de la quantité de déchets de culture augmente l'incidence des maladies. La rotation des cultures et le travail du sol ont peu d'effets sur la maladie, comparativement aux facteurs environnementaux. Moins travailler le sol n'accroît pas sensiblement la gravité de la tache foliaire du blé ni des maladies du pois de grande culture, mais la population de microorganismes responsables du piétin du blé s'en ressent. Ainsi, avec un travail minimum du sol, la population de Bipolaris sorokiniana et de Gaeumannomyces graminis sur les racines du blé diminue, tandis que celle de Fusarium sp. augmente. Ces changements n'affectent pas la gravité du piétin ni le rendement. L'assolement a un effet restreint sur la gravité des maladies du blé et sur la prévalence des espèces cryptogamiques, mais le blé cultivé dans des régimes à plus grande diversité, comprenant des céréales, du pois et du lin, donne toujours un rendement supérieur à celui de la monoculture. Le blé cultivé sur jachère ou aprè...

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“…Jones and Singh (1995) showed that continu ous barley cultivation in this region resulted in a yield de cline that cannot be compensated for by the addition of fertilizer. It is not yet known to what extent root diseases (and pests) have a role in this decline but research in Can ada, the United States, and Australia have demonstrated an increase of root diseases, especially common root rot, under continuous cereal cultivation (Piening and Orr 1988;Conner and Atkinson 1989;El-Nashaar and Stack 1989;Wildermuth and McNamara 1991;Bailey et al 1992).…”

mentioning

confidence: 97%

The occurrence of barley root diseases in different agri-ecological zones of Syria

Leur

Bailey

2000

Canadian Journal of Plant Pathology

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A survey was conducted to determine the occurrence of root diseases and the identity of causal agents on barley grown in northern agricultural areas of Syria in 1992 plants with at least 1 cm long subcrown internodes were randomly selected from each of 53 fields when plants were between flowering and maturity. In 1993, 50 plants were selected from each of 72 fields. In addtion, four wheat fields were sampled in 1993. Plants were visually rated for disease severity on the subcrown internode. Fungal cultures were isolated from root tissues by plating on selective and general media. Isolates were tested for pathogenicity using a seedling bioassay, and representative pathogens were identified to the species level. Root rot was more severe in the drier agricultural zones and disease severity increased with crop maturity. There was a weak negative association between disease severity and the number of tillers per plant. The most prevalent pathogens in both years were Microdochium nivale (average of 43%), Cochliobolus sativus (35%), red-pigmented Fusaria (13%), and Microdochium bolleyi (8%). More than 80% of the C. sativus and M. nivale isolates, and less than 20% of the Fusarium spp. and M. bolleyi isolates, were pathogenic. Cochliobolus sativus was most common in the drier areas, whereas M. nivale was most common in the wetter areas, particularly from the northwest region. This paper is the first report of M. nivale and M. bolleyi on barley and Gaeumannomyces graminis var. tritici on wheat in Syria. Other root disorders (pests) found included cyst-forming nematodes and Porphyrophora tritici.Resume : En 1992 et 1993. un relevé des maladies de racine chez Forge a été effectué dans les regions agricoles du nord de la Syrie pour en connaitre la frequence et l'identité des agents pathogènes en cause. En 1992, 20 plantes ayant un entre-noeud sub-coronal d'au moins 1 cm de long ont été choisies au hasard, entre la floraison et la maturité, dans chacun de 53 champs. En 1993, 50 plantes ont été choisies dans chacun de 72 champs. De plus, quatre champs de blé ont été échantillonnés en 1993. L'intensité des maladies a été évaluée visuellement sur l'entre-nceud sub-coronal. Des cultures fongiques ont été obtenues a partir des tissus de racines par isolement sur des milieux sélectifs ou généraux. Le pouvoir pathogène des isolats a été établi par essai biologique sur des semis et l'identité des champignons pathogènes représentatifs a été établie a Tespèce. La pourriture de racine était plus intense dans les zones agricoles plus sèches et la gravité des maladies augmentait avec la maturité de la culture. Une faible relation negative a été trouvée entre la gravité des maladies et le nombre de talles par plante. Les agents pathogènes les plus frequents lors des deux années ont été le Microdochium nivale (moyenne de 43%), le Cochliobolus sativus (35%), les fusariums carmin (13%) et le Microdochium bolleyi (8%). Plus de 80% des isolats du C. sativus et du M. nivale. et moins de 20% des isolats des Fusarium spp. et du M. bolleyi, étaient...

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Influence of continuous cropping on severity of common root rot in wheat and barley

Cited by 20 publications

References 17 publications

Impact of agronomic practices and environment on diseases of wheat and lentil in southeastern Saskatchewan

Impact of agronomic practices and environment on diseases of wheat and lentil in southeastern Saskatchewan

Effect of tillage and crop rotation on root and foliar diseases of wheat and pea in Saskatchewan from 1991 to 1998: Univariate and multivariate analyses

The occurrence of barley root diseases in different agri-ecological zones of Syria

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