by Howitt, A.J
Year of Publication 1993

by Brunner J.F, Howitt A.J, Bird G.W, Flore J.A, Putnam A.R, Jones A.L, Ramsdell D.C
Published in Extension Bulletin - Michigan State University (1978)

by Brunner J.F, Howitt A.J, Bird G.W, Flore J.A, Putnam A.R, Jones A.L, Ramsdell D.C
Published in Extension Bulletin - Michigan State University (1978)

by Jones A.L, Ramsdell D.C, Brunner J.F, Howitt A.J, Flore J.A, Bird G.W, Dewey D.H, Mattson J.P, Putnam A.R
Published in Extension Bulletin - Michigan State University (1977)

by Clarke, R.G, Howitt, A.J
Published in Annals of the Entomological Society of America (1975)

by Howitt, A.J
Published in Extension bulletin E - Cooperative Extension Service, Michigan State University (USA) (01.12.1986)

by Howitt, A.J
Published in Annual report - Michigan State Horticultural Society (USA) (1984)

by Howitt, A.J
Published in Annual report - Michigan State Horticultural Society (USA) (1986)

by Howitt, A.J
Published in Proceedings of the ... annual meeting (1979)

by Howitt A.J
Published in Proceedings of the Annual Meeting New York State Horticultural Society (1979)

by Howitt A.J
Published in Proceedings of the Annual Meeting New York State Horticultural Society (1979)

by Howitt, A.J
Published in Proceedings of the ... annual meeting (1979)

by Howitt A.J
Published in Annual Report Oregon Horticultural Society (1979)

by Howitt, A.J
Published in Annual Report - Oregon Horticultural Society (USA) (1979)

by Howitt, A.J
Published in Amer Fruit Grower (1970)

by Howitt, A.J
Published in Mich Agr Exp Sta Res Rep (1969)

by Dutcher, J.D, Howitt, A.J
Published in Journal of Economic Entomology (USA) (01.10.1978)

by Murray, D.A. (Murray Pest Management, Paw Paw, MI.), Kriegel, R.D, Johnson, J.W, Howitt, A.J
Published in Great Lakes entomologist (01.06.1996)

by Biddinger, D.J, Roelofs, W, Howitt, A.J
Published in Great Lakes entomologist (1994)

by Waller, J.B, Howitt, A.J
Published in New Zeal J Agr Res (1969)