Survival potential of Phytophthora infestans sporangia in relation to environmental factors and late blight occurrence
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USDA-ARS, Eastern Regional Research Center, Wyndmoor, PA 19038, USA
North Carolina A&T State University, Greensboro, NC 27411, USA
USDA-ARS, Southern Regional Research Center, New Orleans, LA 70124, USA
USDA-ARS, New England Plant, Soil and Water Laboratory, Orono, ME 04469, USA
USDA-NRCS, Washington, D.C. 20250, USA
Submission date: 2015-09-09
Acceptance date: 2016-02-24
Corresponding author
Olanya Ocen Modesto
USDA-ARS, Eastern Regional Research Center, Wyndmoor, PA 19038, USA
Journal of Plant Protection Research 2016;56(1):73-81
Potato is an important crop globally and late blight (Phytophthora infestans) often results in severe crop loss. The cost for late blight control can be in excess of $210 million in the United States. We utilised a non-parametric density distribution analysis of local temperature (T) and relative humidity (RH), from 2005 to 2009, to assess and validate sporangia survival potential using survival model and late blight risks during the potato cropping season at Presque Isle, in the northern part of the state of Maine, USA. Model-based analyses showed that ambient temperatures of 3−30°C and RH values of 45−100% were conducive for sporangia survival. Disease outbreaks and risk periods coincided with a high sporangia survival probability (15−35%). Due to the omission of solar radiation (SR) in the computation of survival potential in previous research, we applied a Cox proportional model to estimate the probability of sporangia survival [i.e. hazard at a specific time H (t)] as a function of baseline hazard (H 0) and the influencing parameters. The model is: H (t) = H 0 (t) × exp(0.067 ET + 0.138 T + 0.083 RH + 0.001 SR) where ET is exposure time. The survival model indicated that RH (β = 0.083) and T (β = 0.138) were significant (p < 0.05) factors in sporangia survival in comparison to SR (β = 0.001). The hazard ratio, indicative of sporangia survival risk, varied with the predictors. For the unit increase of T, sporangia survival hazard increased by 1.148 times. The Cox model and sporangia hazard probabilities can be used for short-term disease forecasts based on the risk period most conducive for pathogen survival and targeted fungicide applications for optimum late blight management.
The authors have declared that no conflict of interests exist.
Andrivon D. 2007. Dynamics of the survival and infectivity to potato tubers of sporangia of Phytophthora infestans. Soil Biology and Biochemistry 26 (8): 945–952.
Birch P.R., Whisson S.C. 2001. Phytophthora infestans enters the genomic era. Molecular Plant Pathology 2: 257−263.
Bowman A.W., Azzalini A. 1997. Applied smoothing techniques for data analysis: The Kernel Approach with S-Plus Illustrations, Oxford University Press, Oxford, UK, 208 pp.
Crosier W. 1934. Studies in the biology of Phytophthora infestans (Mont) de Bary. Cornell Agricultural Experiment Station Memoir: 155−203.
Erwin D.C., Ribeiro O.K. 1996. Phytophthora Diseases Worldwide. American Phytopathological Society Press, St. Paul, Minn., USA, 562 pp.
Fry W.E. 2008. Phytophthora infestans: the plant (and R gene) destroyer. Molecular Plant Pathology 9 (3): 385–402.
Groves C.L. 2002. Characterization of Phytophthora infestans from Maine during 1999 to 2000. American Journal Potato Research 79 (5): 325−333.
Guenthner J.F., Michael K.C., Nolte P. 2001. The economic impact of potato late blight on US growers. Potato Research 44 (2): 121−125.
Halloran J.M., Larkin R.P., DeFauw S.L., Olanya O.M., He Z. 2013. Economic potential of compost amendment as an alternative to irrigation in Maine potato production systems. American Journal of Plant Science 4: 238–245.
Hamill T.M., Whitaker J.S., Mullen S.L. 2006. Reforecasts, an important dataset for improving weather predictions. Bulletin American Meteorological Society 87: 33–46.
Hartill W.F.T., Young K., Allan D.J., Henshall W.R. 1990. Effects of temperature and leaf wetness on the potato late blight. New Zealand Journal Crop Horticultural Science 18 (4): 181−184.
Haverkort A.J., Boonekamp P.M., Hutten R., Jacobsen E., Lotz L.A.P., Kessel G.J.T., Visser R.G.T., van der Vossen E.A.G. 2008. Societal costs of late blight in potato and prospects of durable resistance through cisgenic modification. Potato Research 51 (1): 47–57.
He Z., Larkin R.P., Honeycutt C.W. (eds.). 2012. Sustainable Potato Production: Global Case Studies. Springer, Amsterdam, The Netherlands, 539 pp.
Krause R.A., Massie L.B., Hyre R.A. 1975. BLITECAST: a computerized forecast of potato late blight. Plant Disease Reporter 59: 95–98.
Lima M.A., Maffia L.A., Barreto R.W., Mizubuti E.S.G. 2009. Phytophthora infestans in a subtropical region: survival on tomato debris, temporal dynamics of airborne sporangia and alternative hosts. Plant Pathology 58 (1): 87–99.
Michaelides S.C. 1985. A simulation model of the fungus Phytophthora infestans (Mont) De Bary. Ecological Modelling 28 (1−2): 121−137.
Mizubuti E.S.G., Aylor D.E., Fry W.E. 2000. Survival of Phytophthora infestans sporangia exposed to solar radiation. Phytopathology 90 (1): 78–84.
Olanya O.M., Plant A.B., Larkin R.P., Honeycutt C.W. 2009a. Infection potential of hairy nightshade (Solanum sarrachoides) by Phytophthora infestans and late blight implications of the alternate host. Journal of Phytopathology 157 (7–8): 427–437.
Olanya O.M., Ojiambo P.S., Nyankanga R.O., Honeycutt C.W., Kirk W.W. 2009b. Recent developments in managing tuber blight of potato (Solanum tuberosum) caused by Phytophthora infestans. Canadian Journal of Plant Patholology 31 (3): 280−289.
Olanya M., Nelson R., Hakiza J., Ewell P., El-Bedewy R., Kakuhenzire R., Namanda S., Kasheija I., Wagoire W., Ngombe B., Musoke C. 2010. Comparative assessment of pest management practices in potato production at Farmer Field Schools. Food Security 2 (4): 327−341.
Olanya O.M., Honeycutt C.W., He Z., Larkin R.P., Halloran J.M. 2012a. Early and late blight potential on Russet Burbank potato as affected by microclimate, cropping systems and irrigation management in North eastern United States. p. 43–60. In: “Sustainable Potato Production: Global Case Studies” (Z. He, Larkin R.P., Honeycutt C.W., eds.). Springer, Amsterdam, The Netherlands.
Olanya O.M., Honeycutt C.W., Tschoepe B., Kleinhenz B., Lambert D.H., Johnson S.B. 2012b. Effectiveness of SIMBLIGHT1 and SIMPHYT1 models for predicting Phytophthora infestans in north-eastern United States. Archives of Phytopathology and Plant Protection 45: 1558−1569.
Olanya O.M., Honeycutt C .W., Larkin R.P. 2015. Incidence of Phytophthora infestans on potato in Maine, 2006−2010. Journal of Plant Protection Research 55 (1): 58-68.
Porter L.D., Johnson D.A. 2004. Survival of Phytophthora infestans in surface water. Phytopathology 94 (4): 380−387.
Sato N. 1994. Effect of sporulating temperature on the limit temperature in indirect germination of sporangia of Phytophthora infestans. Annals Phytopathology Society of Japan 60: 60–65.
Sunseri M.A., Johnson D.A., Dasgupta N. 2002. Survival of detached sporangia of Phytophthora infestans exposed to ambient, relatively dry atmospheric conditions. American Journal of Potato Research 79 (6): 443–450.
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