Relationship Between Weather and Soybean Seed Infection by<i>Phomopsis</i>sp.

TeKrony, D. M.; Egli, D. B.; Stuckey, R. E.; Balles, John

doi:10.1094/phyto-73-914

Cited by 41 publications

(15 citation statements)

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“…If seed maturation and harvest coincide with rainy periods, infection by Phomopsis sp. will be favored, as already demonstrated by Tekrony et al (1983), Balducchi and McGee (1987) and Sinclair (1991).…”

Section: Localitysupporting

confidence: 58%

Physical and sanitary quality of soybean seeds produced in the state of Santa Catarina

et al. 2015

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Soybean production accounts for approximately 43% of Brazil's grain produce, worth over 81 million tons for the 2012-2013 cropping season. The use of quality seeds is essential for a high-yield agriculture, since low quality seeds compromise plant standing and increase production costs due to reseeding. This will in turn reduce yields through delays on the establishment dates. Seed quality is affected by relative humidity levels, mechanical damage during harvest and processing, thermal damage during the drying process and the environmental conditions during storage that could foster insect and fungi damage. The climate in the state of Santa Catarina favors soybean seed production, and seed companies in general work with high levels of technology. This work is aimed at characterizing the physical and sanitary quality of soybean seeds produced by different companies at different locations throughout the state of Santa Catarina (municipalities of Xanxerê, Abelardo Luz, Campos Novos and Canoinhas). The physical purity, moisture level, sanitary quality and mechanical damage of soybean seeds were studied at three stages, i.e. reception at the seed processing unit, at the end of the processing process and before being marketed. Results pointed out at mechanical injury and cultivar mixture as the main issues concerning seed lot quality, and that soybean seeds produced in Santa Catarina show pathogen contamination, which emphasizes the need for seed treatment.

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Section: Localitysupporting

confidence: 58%

Physical and sanitary quality of soybean seeds produced in the state of Santa Catarina

et al. 2015

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“…These are known to have a negative impact on soya bean seed germination (McGee, 1992), with c'o~ntrie& such as the U.S.A. and Brazil experiencing a serious probletn with the pathogens Phomopsis sojae and P. longicolla (Kmetz, Ellett & Schmitthenner, 1974;Wilcox, Laviolette & Athow, 1974;TeKrony et at., 1983;McGee, 1992;Zorrilla, Knapp & McGee, 1994), the seed being most susceptible to infection during specific growth stages (Kmetz, Schmitthenner & Ellett, 1978;McGee, 1986McGee, , 1992.…”

Section: Introductionmentioning

confidence: 99%

Germination of South African soya bean seed lots

Hamman

Koning

Venter

1996

South African Journal of Plant and Soil

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A survey of the germination performance of some South African soya bean [Glycine max (L.) Merrill.] cultivars, produced at different localities, was conducted. Seeds were harvested from two early-maturing (Columbus and Crawford), two intermediate-maturing (Prima and Highveld Top), and two late-maturing cultivars (Ibis and Impala), from seven sites. The standard germination test was performed on all 42 seed lots. Germination performance was not linked to any particular maturity type or cultivar, but locality had a distinct effect. Germination of seeds of some seed lots harvested at Groblersdal and Potchefstroom was reduced, primarily due to the effect of seed-borne pathogens, which resulted in relatively large numbers of dead seeds. At Piet Retief, poor germination performance was inversely related to the large number of abnormal seedlings in the standard germination test, which was due to damaged seed coats. There were highly significant correlations between the number of dead seeds and the incidence of fungal infection, and between the number of abnormal seedlings and seedcoat damage. The predominant seed-borne pathogen was identified as Fusarium equiseti, a fungus not previously reported as being present in South African soya bean seed.Saadontkieming van verskeie Suid-Afrikaanse sojaboon [Glycine max(L.) Merrill.]-kultivars, wat in verskillende lokaliteite geproduseer is, is ondersoek. Saad van twee kortseisoen-kultivars (Columbus en Crawford), twee langseisoen-kultivars (Ibis en Impala) en twee intermediere tipes (Prima en Highveld Top) is op sewe lokaliteite geoes. Die standaardontkiemingstoets is op al42 saadlotte uitgevoer. Ontkiemingsprestasie het nie met groeiperiodetipe of kultivar verband gehou nie, maar daar was 'n duidelike invloed van lokaliteit. Ontkieming van sommige van die saadlotte wat op Groblersdal en Potchefstroom geoes is, is verlaag, hoofsaaklik as gevolg van die invloed van saadgedraagde patogene wat tot relatiewe hoe getalle dooie sade gelei het. Swak prestasie van saad afkomstig van Piet Retief was te wyte aan 'n hoe persentasie abnormale saailinge in die ontkiemingstoets wat die gevolg van beskadigde saadhuide was. Hoogs betekenisvolle korrelasies is gevind tussen die aantal dooie sade en die voorkoms van swaminfeksie, asook tussen die aantal abnormale saailinge en saadhuidskade. Die algemeenste saadgedraagde patogeen was Fusarium equiseti. Hierdie fungus is nog nie voorheen as 'n patogeen van Suid-Afrikaanse sojaboonsaad gerapporteer nie.

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“…In August and September when pod filling and physiological maturity occur, rainfall in the 3300-3500, 3100-3300 and 2900-3100 HU areas, respectively, totalled 29, 27, and 28 cm in 1981 and 11, 15, and 19 cm in 1982. A positive correlation between incidence of seed mold and rainfall or humidity has been reported (15,16,17).…”

Section: Discussionmentioning

confidence: 91%

Seed molds of soybean in Ontario and the influence of production area on the incidence ofDiaporthe phaseolorumvar.caulivoraandPhomopsissp.

Anderson

1985

Canadian Journal of Plant Pathology

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Relationship Between Weather and Soybean Seed Infection byPhomopsissp.

Cited by 41 publications

References 0 publications

Physical and sanitary quality of soybean seeds produced in the state of Santa Catarina

Physical and sanitary quality of soybean seeds produced in the state of Santa Catarina

Germination of South African soya bean seed lots

Seed molds of soybean in Ontario and the influence of production area on the incidence ofDiaporthe phaseolorumvar.caulivoraandPhomopsissp.

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