Diseases of wheat and barley in conservation cropping systems of the semiarid Pacific Northwest

Smiley, Richard W.

doi:10.1017/s0889189300006858

Cited by 38 publications

(13 citation statements)

References 63 publications

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Section: Discussionmentioning

confidence: 99%

“…The cereal cyst nematode is also present in the PNW, where it can reduce yields of winter or spring wheat cropped annually (Smiley et al 1994;Smiley 1996). Genetic resistance to nematodes is not available in wheat cultivars developed for the PNW (Smiley 1996) and IMW. The lesion nematode, P. thornei, has been shown to damage wheat and barley, but little is known about its ability to reduce yields or about management in the PNW (Smiley 1996) or the IMW.…”

Section: Discussionmentioning

confidence: 99%

“…Genetic resistance to nematodes is not available in wheat cultivars developed for the PNW (Smiley 1996) and IMW. The lesion nematode, P. thornei, has been shown to damage wheat and barley, but little is known about its ability to reduce yields or about management in the PNW (Smiley 1996) or the IMW. The lesion nematodes, P. thornei and P. neglectus have previously been found in wheat and barley fields in Idaho (Hafez et al 1992), but nothing is known about their ability to reduce yields.…”

Section: Discussionmentioning

confidence: 99%

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Survey of root diseases of wheat and barley in southeastern Idaho

Strausbaugh

Bradley

Koehn

et al. 2004

Canadian Journal of Plant Pathology

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Root diseases of wheat and barley in southeastern Idaho (Intermountain West area of the U.S.A.) have not been extensively studied. Surveys were conducted in 2001 and 2002 to assess root disease severity and to identify soilborne pathogens present in 81 wheat and 52 barley fields in 13 southeastern Idaho counties. Bipolaris sorokiniana and Fusarium culmorum were the most frequent pathogens isolated and also the most virulent in greenhouse pathogenicity tests. Other pathogenic fungi isolated from root lesions included Fusarium spp., Rhizoctonia solani, and Gaeumannomyces graminis var. tritici. Nematode soil assays revealed that 96% of the fields had lesion nematodes (mostly Pratylenchus neglectus) and 78% had stunt nematodes (Tylenchorhynchus spp.). Other nematode species were detected in less than 18% of the fields. The cereal cyst nematode (Heterodera avenae) was found in two fields. Greenhouse experiments with soil cores indicated that disturbing the soil to simulate disking reduced the severity of fusarium root rot. Plant breeders attempting to incorporate resistance to root rot into cereal crops in the Intermountain West should focus on screening with B. sorokiniana and F. culmorum isolates. Résumé: Les maladies racinaires du blé et de l'orge dans le sud-est de l'Idaho (zone intramontagneuse ouest des États-Unis) n'ont pas été beaucoup étudiées. En 2001 et en 2002, des relevés ont été effectués pour évaluer la gravité des maladies racinaires et pour les agents pathogènes identifier telluriques présents dans 81 champs de blé et 52 champs d'orge de 13 comtés du sud-est de l'Idaho. Le Bipolaris sorokiniana et le Fusarium culmorum ont été les agents pathogènes les plus fréquemment isolés et aussi les plus virulents dans des tests de pathogénicité conduits en serre. Parmi les autres champignons pathogènes isolés de lésions racinaires, on a trouvé des Fusarium spp., le Rhizoctonia solani et le Gaeumannomyces graminis var. tritici. Les tests pour les nématodes du sol ont montré que 96 % des champs avaient des nématodes des lésions (principalement des Pratylenchus neglectus) et que 78 % avaient des nématodes du rabougrissement (Tylenchorhynchus spp.). D'autres espèces de nématodes ont été trouvées dans moins de 18 % des champs. Le nématode à kystes des céréales (Heterodera avenae) a été trouvé dans deux champs. Des expériences en serre avec des carottes de sol ont montré que le brassage visant à simuler le passage des disques réduisait la gravité du piétin fusarien. Les améliorateurs qui essaient d'incorporer de la résistance au piétin dans les cultures céréalières de la zone intramontagneuse ouest devraient concentrer leurs efforts de sélection sur l'utilisation d'isolats de B. sorokiniana et de F. culmorum.Mots clés : semis direct, piétin commun, piétin fusarien, piétin-échaudage, rhizoctone commun.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Survey of root diseases of wheat and barley in southeastern Idaho

Strausbaugh

Bradley

Koehn

et al. 2004

Canadian Journal of Plant Pathology

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“…The changes also occur in soil temperature, moisture, aeration, compaction, porosity, plant nutrients, pH and organic matter of soils due to tillage practices. Several diseases are more damaging in high than low-residue seedbeds, and in crops planted during early autumn to reduce soil erosion during winter, especially un-irrigated winter wheat in rotation with summer fallow in low rainfall zones of 250-400 mm rain fall (Smiley, 1996).…”

Section: Dehydrogenase Activitymentioning

confidence: 99%

Resource Conservation Agricultural Practices, Rhizosphere and Diseases of Wheat under Wheat-Rice Cropping System

Rani¹,

Singh²,

Sharma³

et al. 2017

Int.J.Curr.Microbiol.App.Sci

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“…Fungi that infect roots, crowns, and stems are the primary yield-limiting pathogens for dryland cereals in the western United States. Foliar diseases such as rust and smuts are not as damaging to cereals as in many other regions because of low humidity and winter-dominant precipitation combined with integrated genetic, chemical, and cultural management practices for their control (Smiley, 1996).…”

Section: Iiid Diseasesmentioning

confidence: 99%