Philip Rozeboom

Philip Rozeboom

There’s a new face in charge of spreading information about managing pests in South Dakota.

Philip Rozeboom joined South Dakota State University Extension as the pest management coordinator in October 2018, and over the winter, he’s been busying preparing resources and organizing events to help farmers learn the latest about protecting their crops from insects, weeds and disease.

One of his first tasks was updating extension’s pest management guides for 2019, which were made available early last month. The guides give recommendations for controlling pests in corn, soybeans, wheat, alfalfa and oilseeds. They offer details on brand-name herbicides, insecticides, seed treatments and fungicides and provide a rating on pest response to different products.

The pest management guides are available on extension’s website or in pocket-sized printed form.

Another guide that’s in the works is a guide for attacking pests without chemicals. The natural enemy identification guide covers all the predators to a certain pest species. The guide will give a threshold and make recommendations as to whether natural enemies will suppress the pest.

The updated, pocket-sized flipbook will consist of about 80 pages.

“A farmer can go out with the ID guide and get a good idea of what’s out there,” Rozeboom said.

A major event he’s organizing happens each summer. The crop management field school for agricultural professionals is set for July 16 and 17 at the Volga Research Farm.

Rozeboom is an entomologist by training. He said some of the biggest pest issues for South Dakota include the gall midge, and red sunflower weevils and soybean aphids that are developing a resistance to certain insecticides.

Rozeboom, 29, is a native of Dune, Iowa, who attended SDSU for both his undergraduate and graduate degrees. His graduate research in 2012 focused on soybean aphids and their response to organic foliar fungicide. He did studies to determine of MilStop, used to control mildew could be used to control soybean aphids. More research is needed as to whether it was the active ingredient or something else that was effective on the aphids, but Rozeboom said it’s not likely a viable option for aphid control because the product is expensive. What’s more, it’s difficult to stay ahead of aphids with pesticide resistance.

“Soybean aphids go thorugh up to 18 generations per summer. They develop resistance quite quickly,” Rozeboom said.

Before joining extension, Rozeboom had a research associate position at SDSU, working with the extension pest managment team.

To contact Rozeboom, e-mail him at

Janelle is editor of the Tri-State Neighbor, covering South Dakota, southwestern Minnesota, northwestern Iowa and northeastern Nebraska. Reach her at or follow on Twitter @JLNeighbor


Janelle is editor of the Tri-State Neighbor, covering South Dakota, southwestern Minnesota, northwestern Iowa and northeastern Nebraska.