Fruit pathologist with Extension, Research and Teaching responsibilities. Retired 2014.
Retirement Reception (Oct. 2014)
Midwest Home Fruit Production Guide
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Developing a Disease Management Program for Wine Grapes in Ohio
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(Presented 10/26/2010, Department of Plant Pathology)
Grape Disease Management
15-30 minute segment videos on the diseases of grapes and their management.
Much of my research was directed toward developing various components of integrated disease management programs for Ohio fruit crops. Most of the research involved studies on the epidemiology, etiology and ecology of the major fungal pathogens on strawberries, grapes and apples. On strawberries, much of the research focused on epidemiology and control of the major fruit rot diseases (gray mold, caused by Botrytis cinerea; anthracnose, caused by Colletotrichum acutatum; and leather rot, caused by Phytophthora cactorum). Working with graduate students and my colleague Dr. Larry Madden, we developed disease predictive models for all of these fruit rot diseases.
Also of major interest was the effects of various cultural practices on disease development and spread. On grapes, we developed predictive models for black rot, caused by Guignardia bidwellii and downy mildew, caused by Plasmopora viticola. We also conducted annual evaluations to determine the efficacy of experimental and nonregistered fungicides for controlling the major fungal pathogens on Ohio's fruit crops.
In addition to responsibilities in research and teaching, I was a State Extension Specialist with Ohio State University Extension, where it was my duty to provide the most reliable and current information available on diagnosis and control of fruit crop diseases to Ohio fruit growers and other interested clientele. A major emphasis of my work was the development and implementation of integrated disease management programs for the various fruit crops grown in Ohio. Helping fruit growers in Ohio to effectively control their major disease problems was one of the most rewarding aspects of my job.
Anco, D.J., Madden, L.V., and Ellis, M.A.. 2012. Effects of temperature and wetness duration on the sporulation of Phomopsis viticola on infected grape canes. Plant Health Progress (July 2012: 1-9. Anco, D.J., Madden, L.V., Ellis, M.A. 2012. Temporal patterns of sporulation potential of Phomopsis viticola on infected grape shoots, canes, and rachises. Plant Disease 96: 1297-1302.
Nita, M., Ellis, M.A., and Madden, L.V. 2012. Spatial distribution of Phomopsis cane and leaf spot symptoms in commercial vineyards in Ohio. Journal of Phytopathology 160: 26-36.
Rebollar-Alviter, A., Silva-Rojas, H.V., Lopez-Cruz, I., Boyzo-Marin, J., and Ellis, M.A. 2012. Fungicide spray programs to manage downy mildew (dryberry) of blackberry caused by Peronospora sparsa. Crop Protection 42: 49-55.
Rebollar-Alviter, A., Wilson, L.L., Madden, L.V., and Ellis, M.A. 2010. A comparative evaluation of post-infection efficacy of mefenoxam and potassium phosphite with protectant efficacy of azoxystrobin and potassium phosphite for controlling leather rot of strawberry caused by Phytophthora cactorum. Crop Protection. Vol. 29(4): 349-353.
Diaz, M.D., Batzer, J.C., Harrington, T.C., Wong, A.W., Bost, S.C., Cooley, D.R., Ellis, M.A., Hartman, J.R., Rosenberger, D.A., Sundin, G.W., Sutton, T.B., Travis, J .W., Wheeler, M.J., Yoder, K.S., and Gleason, M.L. 2010. Diversity and biogeography of sooty blotch and fly speck on apples in the eastern and Midwestern United States. Phytopathology. Vol. 100: 345-355.
Anco, D.J., Kim, S., Mitchell, T.K., Madden, L.V., and Ellis, M.A. 2009. Transformation of Phomopsis viticola with the green fluorescent protein. Mycologia. Vol. 101, no. 6: 853-858. DOI: 10.3852/09-007
Rebollar-Alviter, H.V. Silva -Rojas, L.X. Zelaya-Molina, and M.A. Ellis. 2009. First report of Peronospora sparsa causing downy mildew (dryberry) of Rubus fruticosus in Mexico. Plant Disease. Vol. 93: 674-674.
Ellis, M. A., Welty, C., Miller, D., and Doohan, D. 2008. Ohio Commercial Tree Fruit Spray Guide. Bulletin 506-A2 (revised). OSUE/OSU. 62 pp.
Ellis, M. A., Welty, C., Williams, R. N., Doohan, D., Wright, S, and Dami, I. 2008. Ohio Commercial Small Fruit and Grape Spray Guide. Bulletin 506-B2 (revised). OSUE/OSU. 75 pp.
Ellis,M.A. 2008. Cultural practices for disease control in Grapes. Massachusetts Berry Notes, Vol. 20: No.7, 6-8.
Ellis, M.A. 2008. Fungicides in organic production systems. Massachusetts Berry Notes, Vol.20: No. 7, 8-11.