Helmut Riedl

Helmut Riedl, Professor, Entomology Ph.D., 1973 Michigan State University, East Lansing Phone: 541.386.2030 ext. 14 Send e-mail to Helmut Riedl

Research Area:
Integrated pest management (IPM) on tree fruits; IPM programs as components of integrated fruit production (IFP) systems.

Description of Research:
Research activities involve studies on the biology, ecology and management of insect and mite pests and their natural enemies on deciduous tree fruits. Main research themes have been: selective control tactics for major and minor fruit pests; pesticide effects on natural enemies; monitoring and management of insecticide and acaricide resistance in tree fruit pests; prediction of pest phenology; cultivar susceptibility to pest attack; and pest management under conventional, organic and integrated fruit production (IFP) systems.

Related Publications:
Pons, S., H. Riedl & J. Avilla. 1999. Toxicity of the ecdysone agonist tebufenozide to codling moth (Lepidoptera: Tortricidae). J. Econ. Entomol. 92:1344-1351.

Bosch, M.D., M.T. Voltes, H. Riedl, R. Tora, M.J. Sarasua & J. Avilla. 1999. Evaluacion de la resistencia de poblaciones espanolas de carpocapsa (Cydia pomonella (L.)) a metil-azinfos. Phytoma 109: 40-51.

Giliomee, J.H. & H. Riedl. 1998. A century of codling moth control in South Africa. I. Historical perspective. J. South African Soc. Hort. Sci. 8(2): 27-31.

Riedl, H., T.L. Blomefield & J.H. Giliomee. 1998. A century of codling moth control in South Africa. II. Current and future status of codling moth management. J. South African Soc. Hort. Sci. 8(2): 32-54.

Niederholzer, F., C.F. Seavert & H. Riedl. 1998. Demonstration and implementation of Integrated Fruit Production (IFP) on pears in northern Oregon: Introduction. In: Proc. VIIth Intern. Symp. Pear Growing, J.B. Retamales et al. (eds.); Acta Hort. 475: 59-66.

Seavert, C.F, F. Niederholzer & H. Riedl. 1998. Demonstration and implementation of Integrated Fruit Production (IFP) on pears in northern Oregon: Economics. In: Proc. VIIth Intern. Symp. Pear Growing, J.B. Retamales et al. (eds.); Acta Hort. 475: 67-75.

Pons, S., J. Avilla, and H. Riedl. 1998. Efecto del momento de aplicacion, utilizacion de coadyuvantes y volumen de tratamientos en la efectividad de tebufenocida para el control de Cydia pomonella (L.) (Lepidoptera: Tortricidae). Boletin de Sanidad Vegetal-Plagas. 24(4): 921-934.

Riedl, H. 1998. Pflanzenschutz im Obstbau in Europa und Nordamerika - ein Vergleich. Obstbau Weinbau 35 (10): 308-309.

Riedl, H. 1998. Comparison of American and European pest problems on tree fruits - different approaches to problem solution. 6th European Congress of Entomology, Ceske Budejovice, Aug 23-29, 1998; Abstracts, Vol. 2: 613-614.

Beers, E.H., H. Riedl, & J.E. Dunley. 1998. Resistance to abamectin and reversion to susceptibility to fenbutatin oxide in spider mite (Acari: Tetranychidae) populations in the Pacific Northwest. J. Econ. Entomol. 91: 352-360.

Varela, L.G., V.P. Jones, P.W. Shearer, H. Riedl, and S.C. Welter. 1997. Monitoring and characterization of insecticide resistance in tentiform leafminer, Phyllonorycter mespilella (Lepidoptera: Gracillariidae) in four western states. J. Econ. Entomol. 90: 252-260.

Riedl, H., and F. Niederholzer. 1997. Secondary pests: the up- and down-side of selective pest management on tree fruits. Proceed. 111th Ann. Mtg. Oregon Hort. Soc. 88: 93-106.

Riedl, H. 1997. Integrated fruit production (IFP), selective pest management, and pesticide resistance. Proceed. 111th Ann. Mtg. Oregon Hort. Soc. 88: 81-85.

Davis / Deschuytter / Duckwall / Einhorn / Laraway / McCarty / Riedl / Rojas / Seavert / Smith / Spotts / Turner / Wallis