Ann E. MacGuidwin
Ph.D.: Michigan State University in Entomology (Nematology)

Research Program

As the department's only nematologist, my research projects often include a wide variety of nematode species, crops, and approaches. Members of our group often work in collaboration with other scientists in the Department. I have two primary research interests - the role of nematodes in the early dying disease of potato and the overwinter survival strategies of nematodes. We have demonstrated in field trials that the nematode Pratylenchus penetrans and Verticillium dahliae interact synergistically to cause potato early dying and are now studying mechanisms responsible for the interaction. The emphasis of our program on the overwinter survival of nematodes is to understand the ecological and physiological parameters which enable nematodes in Wisconsin to survive freezing. The goal of my collaborative work is to develop sustainable management strategies for nematode pests of potato, soybean, corn, and other crops important to the north central region of the U.S.

Selected Publications

MacGuidwin, A. E., M. E. Rosemeyer, and T.-S. Lim. The diversity of nematode communities of four established low and high input midwestern cropping systems over three years. In preparation--to be submitted to Applied Soil Ecology.

MacGuidwin, A. E., M. E. Rosemeyer, and T. S. Lim. 2000. The diversity of nematode communities of four established low and high input midwestern cropping systems over three years. In preparation for Applied Soil Ecology.

Saeed, I. A., A. E. MacGuidwin, D. I. Rouse, and S. Janskey. 2000. Toxicity of volatiles emitted by macerated leves of Brassica spp. and other crop plants toward Pratylenchus penetrans and Verticillium dahliae. In preparation.

MacGuidwin, A. E. 1999. Nematodes Pp --:-- in W. Stevenson and R. Loria, eds. Compendium of potato diseases. APS Press (in press).

Saeed, I. A. A., A. E. MacGuidwin, D. I. Rouse, and T. D. Sharkey. 1999. Stomatal and non-stomatal limitation to photosynthesis in Pratylenchus penetrans- and Verticillium dahliae- infected potato. Crop Science

Saeed, I., A. E. MacGuidwin, and D. I. Rouse. 1998. Effects of initial nematode population density on the interaction of Pratylenchus penetrans and Verticillium dahliae on Russet Burbank potato. J. Nematol. 30:100-107.

Saeed, I. A., A. E. MacGuidwin, and D. I. Rouse. 1997. Disease progress based on gas exchange effects of Verticillium dahliae and Pratylenchus penetrans on Russet Burbank potato. Phytopathology 87:440-445.

Saeed, I. A, A. E. MacGuidwin, and D. I. Rouse. 1997. Synergism of Pratylenchus penetrans and Verticillium dahliae manifested by reduced gas exchange of potato. Phytopathology 87:435-439.

Saeed, I., A. E. MacGuidwin, and D. I. Rouse. 1994. Interactive effects of Pratylenchus penetrans and Verticillium dahliae on potato gas exchange. Phytopathology vol. 84 (Abstr.)

MacGuidwin, A. E. 1993. Management of nematodes. pp. 159-166 in R. C. Rowe (ed) Potato Health Management. St. Paul, APS Press.

Forge, T. A. and A. E. MacGuidwin. 1992. Impact of thermal history on freezing tolerance of second-stage Meloidogyne hapla. J. Nematology 24:262-268.

Forge, T. A. and A. E. MacGuidwin. 1992. Effects of water potential and temperature on survival of the nematode Meloidogyne hapla in frozen soil. Can. J. Zool. 70:1552-1560.

MacGuidwin, A. E. and D. I. Rouse. 1990. Role of Pratylenchus penetrans in the potato early dying disease of Russet Burbank Potato. Phytopathology 80:1077-1082.

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