Soil Temperature and Moisture Effects on Sclerotium Germination and Infection of Onion Seedlings by<i>Sclerotium cepivorum</i>

Crowe, F. J.; Hall, D. H.

doi:10.1094/phyto-70-74

Cited by 38 publications

(35 citation statements)

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“…Germination of sclerotia of S. cepivorum without Allium spp. was observed previously (Crowe and Hall, 1980;Merriman et al, 1981;Coley-Smith and Parfitt, 1986). In all these studies germination did not exceed the level of 20%.…”

Section: Discussionsupporting

confidence: 77%

“…Viability was determined according to Crowe and Hall (1980). Surface-sterilized sclerotia were cracked with forceps and placed on water agar.…”

Section: Methodsmentioning

confidence: 99%

“…In the absence of suitable host plants, these sclerotia may survive for many years (ColeySmith and Sansford, 1986). Although germination of sclerotia has been reported to occur at a low level in the absence of host plants (Merriman at al., 1981;Crowe and Hall, 1980), it is generally a very specific response to compounds released by Allium species (Coley-Smith and Holt, 1966;Coly-Smith and King, 1969). This germination response can be induced by treatment of sclerotia with Allium extracts (Crowe and Hall, 1980), artificial onion oil (Merriman et al, 1981) or diallyl disulphide (DADS) (ColeySmith and Parfitt, 1986).…”

Section: Introductionmentioning

confidence: 99%

“…Although germination of sclerotia has been reported to occur at a low level in the absence of host plants (Merriman at al., 1981;Crowe and Hall, 1980), it is generally a very specific response to compounds released by Allium species (Coley-Smith and Holt, 1966;Coly-Smith and King, 1969). This germination response can be induced by treatment of sclerotia with Allium extracts (Crowe and Hall, 1980), artificial onion oil (Merriman et al, 1981) or diallyl disulphide (DADS) (ColeySmith and Parfitt, 1986). The germination of sclerotia induced by DADS showed a seasonal response: summer treatments with DADS during June, July and August gave a poor germination, but a high level of germination was recorded for treatments in the other months of the year.…”

Section: Introductionmentioning

confidence: 99%

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The effects of various temperatures during storage in soil on subsequent germination of sclerotia of Sclerotium cepivorum

Gerbrandy

1989

Netherlands Journal of Plant Pathology

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The effects of various storage temperatures on germination of sclerotia of Sclerotium cepivorum Berk. were investigated. Sclerotia buried in soil for 10 weeks at temperatures of 5 and 10 ~ were conditioned to a fast germination. When germination was performed at 15 ~ and induced by Allium extracts, 50~ of these sclerotia germinated within 10 days and the total of germination was over 90~ Sclerotia buried at temperatures of 15, 20 and 25 ~ were conditioned to a slow germination. About 50~ of these sclerotia could be induced to germinate at 15 ~ by Allium extracts. The conditioning by high or low temperatures proved to be reversible.The optimum temperature for germination of the cold (5 ~ conditioned sclerotia was 10-20 ~ The optimum temperature for germination of sclerotia conditioned at 20 ~ was about 10 ~ C. Without Allium extracts 90o70, 80~ 50~ and 40~ of the sclerotia stored at 5 ~ germinated at temperatures of 10, 5, 15 and 20 ~ respectively. Sclerotia stored at 20 ~ did not germinate without Allium extracts at any temperature.

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Section: Discussionsupporting

confidence: 77%

“…Viability was determined according to Crowe and Hall (1980). Surface-sterilized sclerotia were cracked with forceps and placed on water agar.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effects of various temperatures during storage in soil on subsequent germination of sclerotia of Sclerotium cepivorum

Gerbrandy

1989

Netherlands Journal of Plant Pathology

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“…Sclerotial germination is little affected by pHs varying from 4.8 to 8.5 (Entwistle and Granger, 1977); there is a decrease in germination of sclerotia as soils became drier or wetter than field capacity (-300 millibars) (Crowe and Hall, 1980). Sclerotia may persist in the soil from at least four to 20 years (Entwistle and Munasinghe, 1978;Entwistle, 1990).…”

Section: (B) Epidemiologymentioning

confidence: 99%