In the News

Follow Us

MSU Entomology



Website: Keith Mason
copyright 2014

Steve Van Timmeren
Research Technician

Trevor Nichols Research Center
6237 124th Ave
Fennville, MI 49408
269/ 561-5040
vantimm2 "at" msu.edu



I received my B.S. in Biology from Calvin College in Grand Rapids, MI in 1997 and my M.S. in Biological Sciences from Eastern Illinois University in Charleston, IL in 2000. My Master's research was on the emergence and reproductive behaviors of the Japanese beetle. I studied when male and female beetles emerged from the soil and how emergence related to specific mating and egg laying behaviors.

As a research technician in the Berry Crops Entomology laboratory, I am involved in various projects with a primary focus on two important pests, the spotted wing Drosophila and blueberry stem gall wasp.  

In our spare time, my wife and I enjoy doing just about anything outside. This includes everything from cross-country skiing in winter to running all year round. We also try to keep up with our two daughters who always keep us busy!



Van Timmeren, S., Sial, A.A., Lanka, S.K., Spaulding, N.R., and Isaacs, R. (2019) Development of a rapid assessment method for detecting insecticide resistance in spotted wing Drosophila (Drosophila suzukii Matsumura). Pest Management Science, doi: 10.1002/ps.5341

Van Timmeren, S., Mota-Sanchez, D., Wise, J. C. and Isaacs, R. (2018) Baseline susceptibility of spotted wing Drosophila (Drosophila suzukii) to four key insecticide classes. Pest Management Science, 74: 78-87.

Van Timmeren S., Diepenbrock L.M., Bertone M.A., Burrack H.J., Isaacs R. (2017) A filter method for improved monitoring of Drosophila suzukii (Diptera: Drosophilidae) larvae in fruit. Journal of Integrated Pest Management doi: 10.1093/jipm/pmx019

Van Timmeren, S., Horejski, L., Larson S., Spink K., Fanning, P., and Isaacs, R. (2017) Diurnal activity of Drosophila suzukii (Diptera: Drosophilidae) in highbush blueberry and behavioral response to irrigation and application of insecticides. Environmental Entomology doi: 10.1093/ee/nvx131

Leach H., S. Van Timmeren, and R. Isaacs. (2016) Exclusion netting delays and reduces Drosophila suzukii (Diptera: Drosophilidae) infestation in raspberries. Journal of Economic Entomology, tow157.

Pelton, E., C. Gratton, R. Isaacs, S. Van Timmeren, A. Blanton, and C. Guedot. (2016) Earlier activity of Drosophila suzukii in high woodland landscapes but relative abundance is unaffected. Journal of Pest Science, DOI: 10.1007/s10340-016-0733-z.

Burrack, H.J, Asplen, M., Bahder, L., Collins, J., Drummond, F.A., Guedot, C., Isaacs, R., Johnson, D., Blanton, A., Lee, J.C., Loeb, G., Rodriguez-Saona, C., Van Timmeren, S., Walsh. D, and McPhie, D.R. (2015) Multistate comparison of attractants for monitoring Drosophila suzukii (Diptera: Drosophilidae) in blueberries and caneberries. Environmental Entomology, 1-9. DOI: 10.1093/ee/nvv022

Lee, J.C., Dreves, A.J., Cave, A.M., Kawai, S., Isaacs, R., Miller, J.C., Van Timmeren, S., and Bruck, D.J. (2015) Infestation of wild and ornamental noncrop fruits by Drosophila suzukii (Diptera: Drosophilidae). Annals of the Entomological Society of America, 1-13. DOI: 10.1093/aesa/sau014

Van Timmeren, S., and Isaacs, R. (2014). Drosophila suzukii in Michigan vineyards, and the first report of Zaprionus indianus from this region. Journal of Applied Entomology, doi: 10.1111/jen.12113.

Van Timmeren, S., and Isaacs, R. (2013). Control of spotted wing drosophila, Drosophila suzukii, by specific insecticides and by conventional and organic crop protection programs. Crop Protection, 54: 126-133.

Shearer, P.W., Beers, E.H., Brown, P., Burrack, H.J., Isaacs, R., Lee, J., Miller, B., Novotny, L., Van Timmeren, S., Van Steenwyk, R., Walton, V., and Wise, C. (2013) Drosophila suzukii in the USA; monitoring and management in berries and cherries. Integrated protection of fruit crops, IOBC-WPRS Bulletin 91, 315-316.

Van Timmeren, S., Wise, J.C., and Isaacs, R. (2012) Soil application of neonicotinoid insecticides for control of insect pests in wine grape vineyards. Pest Management Science. 68: 537-542.

Teixera, L., Mason, K.S., Van Timmeren, S., and Isaacs, R. (2011) Seasonal pattern of oviposition by the North American grape berry moth (Lepidoptera: Tortricidae). Journal of Applied Entomology. 135: 693-699.

Van Timmeren, S., Wise, J.C., VanderVoort, C., and Isaacs, R. (2011) Comparison of foliar and soil formulations of neonicotinoid insecticides for control of potato leafhopper, Empoasca fabae (Homoptera: Cicadellidae), in wine grapes. Pest Management Science. 67: 560-567.

Van Timmeren, S.and Isaacs, R. (2009) Susceptibility of highbush blueberry cultivars to cranberry fruitworm and Japanese beetle. International Journal of Fruit Science. 9(1): 23-34.

Isaacs, R. and Van Timmeren, S. (2009) Monitoring and temperature-based prediction of the whitemarked tussock moth (Lepidoptera: Lymantriidae) in blueberry. Journal of Economic Entomology 102(2),637-645.

Van Timmeren, S., Switzer, P., and Kruse, K. (2000) Emergence and reproductive patterns in the Japanese beetle, Popillia japonica (Coleptera: Scarabaeidae). Journal of the Kansas Entomological Society 74(1), 17-27.


Technical Reports

Technical reports of insecticide and acaracide trials are available through the website Arthropod Management Tests. Reports from each year can be searched by crop, pest, author, etc.