Field evaluation of a new sequential sampling technique for determining apple scab "risk"

Plant Disease

Volumn 89, Issue 3, 2005, Pages 228-236

  Reardon, J E ^a   Berkett, L P ^a   Garcia, M E ^a   Gotlieb, A ^a   Ashikaga, T ^b   Badger, G ^b  

^a UNIVERSITY OF VERMONT   (United States)

^b UNIVERSITY OF VERMONT COLLEGE OF MEDICINE   (United States)

Author keywords

PAD; Potential ascospore dose; Venturia inaequalis

Indexed keywords

COMPUTER SIMULATION; COMPUTER SOFTWARE; FRUITS; FUNGICIDES; FUNGUS ATTACK;

APPLE ORCHARDS; APPLE SCAB; RISK RATINGS;

PLANTS (BOTANY);

COMPUTER PROGRAMS; FRUITS; FUNGICIDES; FUNGUS RESISTANCE; PLANTS; SIMULATION;

EID: 14844304745     PISSN: 01912917     EISSN: None     Source Type: Journal    
DOI: 10.1094/PD-89-0228     Document Type: Article

References (21)

1. Berkett, L. P., ed. 2000. Apple scab biology and epidemiology. Pages 7-11 in: 2000-2001 New England Apple Pest Management Guide. G. Koehler, ed. Cooperative Extension Service, Universities of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
2. Berkett, L. P., MacHardy, W. E., Sutton, D. K., Neff, G., and Bradshaw, T. 1997. "Whole farm" apple scab IPM project. Proc. 103th Annu. Meet. Mass. Fruit Grow. Assoc. Inc. 103:132-137.
3. Berkett, L. P., and Wolfgang, S. 1990. Introduction. Pages 1-2 in: Management Guide for Low Input Apple Production. USDA Northeast Low Input Sustainable Agriculture Apple Production Project, Cornell University, Rodale Research Center, Rutgers University, University of Massachusetts, and University of Vermont.
4. Burchill, R. T., Hutton, K. E., Crosse, J. E., and Garrett, C. M. E. 1965. Inhibition of the perfect stage of Venturia inaequalis (Cke.) Wint., by urea. Nature 205:520-521.
5. Chapman, P. J., and Catlin, G. A. 1976. Growth stages in fruit trees. N. Y. Food Life Sci. Bull. 58. N. Y. Agric. Exp. Stn. Geneva, NY.
6. Gadoury, D. M., and MacHardy, W. E. 1982. A model to estimate the maturity of ascospores of Venturia inaequalis. Phytopathology 72:901-904.
7. Gadoury, D. M., and MacHardy, W. E. 1986. Forecasting ascospore dose of Venturia inaequalis in commercial apple orchards. Phytopathology 76:112-118.
8. Gadoury, D. M., MacHardy, W. E., and Rosenberger, D.A. 1989. Integration of pesticide application schedules for disease and insect control in apple orchards in the northeastern United States. Plant Dis. 73:98-105.
9. Gadoury, D. M., Seem, R. C., and Stensvand, A. 1995. New developments in forecasting the risk of apple scab. N. Y. Fruit Q. 2:5-8.
10. Koehler, G. W., ed. 1998. 1998-1999 New England Apple Pest Management Guide. Cooperative Extension Service, Universities of Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island, and Vermont.
11. MacHardy, W. E. 1994. A "PAD" action threshold: the key to integrating practices for managing apple scab. Pages 75-82 in: Integrated Control of Pome Fruit Diseases. Denis J. Butt, ed. Norw. J. Agric. Sci. Suppl. No. 17.
12. MacHardy, W. E. 1996. Modes of overwintering. Pages 190-195 in: Apple Scab Biology, Epidemiology and Management. American Phytopathological Society Press, St. Paul, MN.
13. MacHardy, W. E. 1998. Action thresholds for managing apple scab with fungicides and sanitation. Acta Hortic. 52:123-131.
14. MacHardy, W. E., Berkett, L. P., Neefus, C. D., Gotlieb, A. R., and Sutton, D. K. 1999. An autumn foliar scab sequential sampling technique to predict the level of "scab-risk" next spring. (Abstr.) Phytopathology 89:S47.
15. MacHardy, W. E., and Gadoury, D. M. 1989. A revision of Mill's criteria for predicting apple scab infection periods. Phytopathology 79:304-310.
16. MacHardy, W. E., Gadoury, D. M., and Rosenberger, D. A. 1993. Delaying the onset of fungicide programs for control of apple scab in orchards with low potential ascospore dose of Venturia inaequalis. Plant Dis. 77:372-375.
17. MacHardy, W. E., and Jeger, M. J. 1983. Integrating control measures for the management of primary apple scab, Venturia inaequalis (Cke.) Wint. Prot. Ecol. 5:103-125.
18. Reardon, J. E. 2002. Field validation of a new sequential sampling technique for determining 'risk' of apple scab in Vermont apple orchards. M.S. thesis, University of Vermont, Burlington.
19. Ross, R. G., and Burchill, R. T. 1968. Experiments using sterilized apple-leaf discs to study the mode of action of urea in suppressing the perithecia of Venturia inaequalis (Cke.) Wint. Ann. Appl. Biol. 62:289-296.
20. Stensvand, A., Gadoury, D. M., Amundsen, T., Semb, L., and Seem, R. C. 1997. Ascospore release and infection of apple leaves by conidia and ascospores of Venturia inaequalis at low temperatures. Phytopathology 87:1046-1053.
21. Sutton, D. K., MacHardy, W. E., and Lord, W. G. 2000. Effects of shredding or treating apple leaf litter with urea on ascospore dose of Venturia inaequalis and disease buildup. Plant Dis. 84:1319-1326.