The use of the area under the disease-progress curve (AUDPC) to assess quantitative disease resistance in crop cultivars

Jeger, M.J.; Viljanen‐Rollinson, S. L. H.

doi:10.1007/s001220051615

Cited by 352 publications

(235 citation statements)

References 36 publications

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“…where R 1 to R 4 represent the desiccation ratings observed at the respective evaluation timings t 1 , t 2 , t 3 and t 4 ( Van der Plank 1963;Jeger and Viljanen-Rollinson 2001;Simko and Piepho 2012). The modified use of Eq.…”

Section: Data Collectionmentioning

confidence: 99%

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

et al. 2015

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. 2015. Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.). Can. J. Plant Sci. 95: 369Á375. Early application of desiccants in dry edible bean may cause yield reductions and unacceptable herbicide residue levels, resulting in rejection of exported shipments. The effect of application timing of two registered desiccants, glyphosate and saflufenacil, was examined in 12 field trials conducted over a 4-yr period (2009Á2012) at Exeter, Ontario, Carman, Manitoba, and Lethbridge, Alberta. Desiccants were applied alone and in combination at five crop maturation stages. When glyphosate or saflufenacil alone, or in combination, was applied at 100% crop maturity, herbicide residue levels were acceptable (less than 2.0 and 0.01 ppm for glyphosate and saflufenacil, respectively) and there was no reduction in yield or hundred seed weight. Glyphosate residues remained below 2.0 ppm when the desiccant was applied alone or with saflufenacil at 75% crop maturity, but crop yield decreased by 16% compared with the untreated control when glyphosate and saflufenacil were combined. Residue levels were unacceptable when glyphosate was applied at 0, 25, and 50% maturity; generally the earlier glyphosate was applied, the greater the residue concentration in the seeds at harvest. Although no application timing resulted in saflufenacil residues above 0.01 ppm, crop yield was reduced when the desiccant was applied at 0, 25, 50, and 75% crop maturity. This information will provide dry bean processors with the necessary information to design guidelines concerning the application timing of glyphosate and saflufenacil so that bean yield and quality remain unaffected and seed residues remain below accepted levels.Key words: Desiccation, dry edible bean, harvest aid, maximum residue level, Phaseolus vulgaris L.McNaughton, K. E., Blackshaw, R. E., Waddell, K. A., Gulden, R. H., Sikkema, P. H. et Gillard, C. L. 2015. Conse´quences du moment de l'application du glyphosate et du saflufenacil employe´s comme agents de dessiccation avec le haricot (Phaseolus vulgaris L.). Can. J. Plant Sci. 95: 369Á375. L'application haˆtive d'agents de dessiccation au haricot peut donner lieu a`des pertes de rendement et a`une concentration inacceptable de re´sidus d'herbicide, puis, par voie de conse´quence, entraıˆner le rejet des lots de haricot sec exporte´s. Les auteurs ont examine´les conse´quences du moment d'application du glyphosate et du saflufenacil, deux agents de dessiccation homologue´s, lors de douze essais au champ re´alise´s au cours d'une pe´riode de quatre ans (2009Á2012) a`Exeter (Ontario), a`Carman (Manitoba) et a`Lethbridge (Alberta). Les agents ont e´te´applique´s seuls ou combine´s a`cinq stades de maturation de la culture. Quand on applique le glyphosate, le saflufenacil ou les deux au moment ou`la culture a atteint 100 % de sa maturite´, la concentration de re´sidus d'herbicide est acceptable (moins de 2,0 et de 0,01 ppm respectivement pour le glyphosate et le saflufenacil) et ...

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Section: Data Collectionmentioning

confidence: 99%

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

et al. 2015

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“…They stopped 47 and 34 days later, which corresponded to 121 and 103 days after planting for the 2008/09 and 2009/10 seasons, respectively. Subsequently, the area under the disease progress curve (AUDPC) was calculated (Jeger & Viljanen-Rollinson, 2001;Yuen & Forbes, 2009) using equation (1):…”

Section: Evaluation Of Resistance To P Infestansmentioning

confidence: 99%

Resistance to Phytophthora infestans in Solanum tuberosum landraces in Southern Chile

Solano¹,

Acuña²,

Esnault³

et al. 2014

Trop. plant pathol.

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The objective of this work was to evaluate the resistance of 30 Chilean potato landraces to natural infection by Phytophthora infestans during two growing seasons in Southern Chile. Control cultivars were 'Désirée', which has moderate susceptibility to late blight, and 'Karú', which is characterized by moderate resistance to the disease. The response of the potato landraces to late blight infection was assessed weekly by scoring the percentage of foliage destruction during the growing season. Subsequently, the relative area under the disease progress curve (AUDPCr) was calculated. A wide response variation was observed among the landraces during the occurrence of late blight. The comparative analysis of the AUDPCr showed that three landraces achieved high resistance to the disease (low AUDPCr values). These were UCT-34Cor (0.05), UCT-26Ach (0.06) and UCT-27Mu (0.10). Most of the potato landraces were classified into the range moderately resistant to moderately susceptible. The estimated values of heritabilities of the means were moderate to high for the joint analysis of the two years tested (0.65). The wide range of AUDPCr observed within potato landraces suggests the presence of partial resistance in response to the complex virulence pattern of the P. infestans populations present in Southern Chile.

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“…The SI for one plant corresponds to the average percentage of necrotic leaf surface (calculated by the averaging the scores for all plant leaves) and it was used as a data point to build a diseaseprogress curve. To quantify the disease infestation for each plot, we calculated the area under the SI disease-progress curve (AUDPC) for all plants according to Jeger and Viljanen-Rollinson (2001). At each date of disease observation, the YLS (youngest leaf spotted) was scored according to the method described by Stover and Dickson (1970).…”

Section: Assessment Of Leaf Spot Diseasesmentioning

confidence: 99%

Effects of Black Leaf Streak Disease and Sigatoka Disease on fruit quality and maturation process of bananas produced in the subtropical conditions of southern Brazil

et al. 2012

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The use of the area under the disease-progress curve (AUDPC) to assess quantitative disease resistance in crop cultivars

Cited by 352 publications

References 36 publications

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

Effect of application timing of glyphosate and saflufenacil as desiccants in dry edible bean (Phaseolus vulgaris L.)

Resistance to Phytophthora infestans in Solanum tuberosum landraces in Southern Chile

Effects of Black Leaf Streak Disease and Sigatoka Disease on fruit quality and maturation process of bananas produced in the subtropical conditions of southern Brazil

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