The Purdue Plant and Pest Diagnostic Laboratory

Asian Soybean Rust

Coneflower Wit

The following question was sent to the P&PDL diagnosticians here at Purdue University:

Question: I live in Indianapolis. Last year I noticed one of my coneflower plants had yellow striations on it's leaves which looked like rose mosaic. The plant was not chlorotic. Other than the discolored leaves it seemed healthy and flowered. This year, I've noticed in addition to the original plant with mosaic like appearance there are now three more on the other side of the path displaying same symptoms. I have had a rose with mosaic planted in the general area, could this be a source of the problem?

Answer: Before control recommendations are given, it is very important to identify the specific virus. Therefore, we are not able to answer your specific question without seeing a sample. You are welcome to submit a sample to our lab and we will diagnose the problem for a fee of $11 within Indiana. Virus testing is an additional $25. If you do not wish to pay for the extra virus test, only "most likely" comments will be given rather than confirmed comments.

If you do not want virus testing done for the additional $25, please state so on the sample submission form. You can find a copy of our sample submission form on our webpage, or you can write a letter describing your problem. Include your email address and we can respond via email. Mail your sample to:

Plant and Pest Diagnostic Lab
Purdue University
915 W. State Street
West Lafayette, IN 47907-2054


Information listed is valid only for the state of Indiana.

The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by the Purdue University Cooperative Extension Service is implied. Any person using products listed assumes full responsibility for their use in accordance with current direction of the manufacturer. Purdue University is an equal opportunity/equal access institution.

Purdue Cooperative Extension Service