Contamination of ryegrass seed with Drechslera species and its effect on disease incidence in the ensuing crop

Labruyère, Rob

doi:10.1007/bf01977032

Cited by 8 publications

(4 citation statements)

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“…Other foliage pathogens include Drechslera sissans, which causes significant production losses; disease incidence is significantly increased with high nitrogen (N) use conditions [44,48,49]. Though not prominent in Australia, snow mould (Microdochium nivale) and grey leaf spot (Pyricularia grisea) are another two serious diseases causing yield losses in perennial ryegrass and tall fescue in the northern hemisphere [50,51].…”

Section: Disease Stress To Pasture Grassesmentioning

confidence: 99%

“…Another approach is to apply suitable fertiliser in desirable rates of application to enrich the growth medium with macro and micro nutrients necessary for plant growth and performance [63,65]. Cultural and mechanical control measures include grazing and irrigation management practices [49,60]. All these curative methods are costly and labour demanding.…”

Section: Disease Stress To Pasture Grassesmentioning

confidence: 99%

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Metabolic Potential of Epichloë Endophytes for Host Grass Fungal Disease Resistance

et al. 2021

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Asexual species of the genus Epichloë (Clavicipitaceae, Ascomycota) form endosymbiotic associations with Pooidae grasses. This association is important both ecologically and to the pasture and turf industries, as the endophytic fungi confer a multitude of benefits to their host plant that improve competitive ability and performance such as growth promotion, abiotic stress tolerance, pest deterrence and increased host disease resistance. Biotic stress tolerance conferred by the production of bioprotective metabolites has a critical role in an industry context. While the known antimammalian and insecticidal toxins are well characterized due to their impact on livestock welfare, antimicrobial metabolites are less studied. Both pasture and turf grasses are challenged by many phytopathogenic diseases that result in significant economic losses and impact livestock health. Further investigations of Epichloë endophytes as natural biocontrol agents can be conducted on strains that are safe for animals. With the additional benefits of possessing host disease resistance, these strains would increase their commercial importance. Field reports have indicated that pasture grasses associated with Epichloë endophytes are superior in resisting fungal pathogens. However, only a few antifungal compounds have been identified and chemically characterized, and these from sexual (pathogenic) Epichloë species, rather than those utilized to enhance performance in turf and pasture industries. This review provides insight into the various strategies reported in identifying antifungal activity from Epichloë endophytes and, where described, the associated antifungal metabolites responsible for the activity.

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Section: Disease Stress To Pasture Grassesmentioning

confidence: 99%

Section: Disease Stress To Pasture Grassesmentioning

confidence: 99%

Metabolic Potential of Epichloë Endophytes for Host Grass Fungal Disease Resistance

et al. 2021

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“…Drechslera siccans and D. catenaria are seed-borne pathogens causing root rot of Lolium sp. arid also are found on f. rubra (30,52).…”

Section: Literaturementioning

confidence: 84%

“…Drechslera siccans and D. catenaria are seed-borne pathogens causing root rot of Lolium sp. arid also are found on f. rubra (30,52).The importance of seed-borne Q. sorokiniana on barley was studied by Jorgensen (26) relative to discoloration of seedling roots. Up to 4.5 % of the barley seed examined was conta~inated with Q. sorokiniana and a positive correlation was established beb1een the percent of seeds with .Q_.…”

mentioning

confidence: 99%

Effects of Drechslera sorokiniana, Curvularia geniculata and Alternaria alternata on germination and seedling establishment of Festuca rubra in soil as influenced by nitrogen fertilization.

Madsen

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LITERATUREPathogenicity of Drechsler~ sorokiniana and Drechslera species .Q_r~_chslcra_ _ snrohnian_ a_ (Sacc.) Subram and Jain ( = flelminthosporium sorokinianum Sacc. in Sorok. =H. sativum P.K. and B.) is a serious pathogen of numerous grass species including Festuca rubra L. and causes leaf spot and crown and root rot (17,24,26,32, 40). Drechslera sorokiniana (tl. sativum) is distributed world-wide, particularly in temperate climates (35). It exists as dormant spores in soil or as spores on crop debris (40).Drechslera sorokiniana is the causal organism of root rot of wheat (47).Leaf spot of f. rubra and F. rubra L. spp. rubra also is caused by foliar infections by Q. sorokiniana (3, 45).Drechslera dictyoides and Q. siccans are found associated with seed of ryegrass and meadow fescue (50). Drechslera siccans and D. catenaria are seed-borne pathogens causing root rot of Lolium sp. arid also are found on f. rubra (30,52).The importance of seed-borne Q. sorokiniana on barley was studied by Jorgensen (26) relative to discoloration of seedling roots. Up to 4.5 % of the barley seed examined was conta~inated with Q. sorokiniana and a positive correlation was established beb1een the percent of seeds with .Q_. sorokiniana and the discoloration of seedling roots. The occurrence of D. sorokiniana on barley seed only slightly reduced the emergence of the seedlings in field tests. However, Q. sorokiniana persisted on the plants through the summer. It was concluded that Q. sorokiniana may kill the plant at the seedling stage, develop into a chronic disease on the

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The effects of pests and diseases on grasses

Plumb¹

1988

The Grass Crop

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Contamination of ryegrass seed with Drechslera species and its effect on disease incidence in the ensuing crop

Cited by 8 publications

References 4 publications

Metabolic Potential of Epichloë Endophytes for Host Grass Fungal Disease Resistance

Metabolic Potential of Epichloë Endophytes for Host Grass Fungal Disease Resistance

Effects of Drechslera sorokiniana, Curvularia geniculata and Alternaria alternata on germination and seedling establishment of Festuca rubra in soil as influenced by nitrogen fertilization.

The effects of pests and diseases on grasses

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