Bill G. Johnson
William "Bill" G. Johnson is a professor of Botany and Plant Pathology at Purdue University. His area of expertise is weed science, specifically, the biology and management of economically important weeds in agronomic crops; interactions between weed management tactics, insects and diseases.
Johnson lists his research objectives as:
- 1. Develop weed management systems that are economically and environmentally sound, integrate cultural practices with judicious herbicide use, improve efficiency of production, and minimize selection pressure for herbicide-resistant weeds.
- 2. Promote grower acceptance of these weed management systems through education efforts targeting growers, crop consultants, input suppliers, industry representatives and extension educators in Indiana and surrounding states.
He focuses his research on:
- Biology, Management, and Distribution of Glyphosate Resistant Horseweed, Giant Ragweed, Volunteer Corn, and other Weeds.
- Interactions Between Weeds and Other Plant Pests Such as Soybean Cyst Nematode, and Western Corn Rootworm.
- Management of Weeds Common to No-Till Systems.
- Evaluation and Management of New Weed Management Tools and Transgenic Events such as 2,4-D Resistant Crops, Dicamba-Tolerant Soybeans, and Optimum GAT Crops.
- Brabham, C., & Johnson, W. G. (2010). Efficacy of Ignite and Flexstar Tank Mixtures on Giant Ragweed and Common Lambsquarters. Crop Management, 2010.
- Johnson, W. G., Young, B., Matthews, J., Marquardt, P., Slack, C., Bradley, K., York, A., Culpepper, S., Hager, A., Al-Khatib, K., Steckel, L., Moechnig, M., Loux, M., Bernards, M., & Smeda, R. (2010). Weed control in dicamba-resistant soybeans. Crop Management, 2010.
- Weller, S. C., Owen, M. D. K., & Johnson, W. G. (2010). Managing glyphosate-resistant weeds and population shifts in Midwestern U.S. cropping systems. Glyphosate Resistance in Crops and Weeds – History, Development and Management (213-233). Hoboken, NJ: John Wiley and Sons.
- Davis, V. M., Kruger, G. R., Hallett, S. G., Tranel, P. J., & Johnson, W. G. (2010). Heritability of glyphosate resistance in Indiana horseweed (Conyza canadensis) populations. Weed Science, 58, 30-38.
- Kruger, G. R., Davis, V. M., Weller, S. C., & Johnson, W. G. (2010). Growth and seed production of horseweed (Conyza canadensis) after exposure to 2,4-D. Weed Science, (58), 413-419.
- Johnson, W. G., Mock, V. A., Creech, J. E., & Hallett, S. E. (2010). Influence of Winter Annual Weed Removal Timings on Soybean Cyst Nematode Population Density and Plant Biomass. Weed Science, 58, 381-386.
- Kruger, G. R., Davis, V. M., Weller, S. C., & Johnson, W. G. (2010). Control of horseweed (Conyza canadensis) with growth regulator herbicides. Weed Technology, 24, 425-429.
- Davis, V. M., Kruger, G. R., Young, B. G., & Johnson, W. G. (2010). Fall and spring preplant herbicide applications influence spring emergence of glyphosate-resistant horseweed (Conyza canadensis). Weed Technology, 24, 11-19.
- Loux, M., Stachler, J., Johnson, W. G., Nice, G., & Bauman, T. (2009). 2009 Weed Control Guide for Ohio and Indiana.
- Krupke, C., Marquardt, P., Johnson, W. G., Weller, S., & Conley, S. P. (2009). Volunteer corn presents new challenges for insect resistance management. Agronomy Journal, 101, 797-799.
Awards & Honors
- Advisor of WSSA Outstanding Ph.D. Student (2010). Weed Science Society of America.
- Outstanding Extension Specialist Award (2010). Weed Science Society of America.
- Advisor of Outstanding Ph.D. Student - Greg Kruger (2009). Dept. of Botany and Plant Pathology.
- CropLife Educator of the Year (2009). Mid America CropLife Association.
- Outstanding Graduate Educator Award (2009). Dept. of Botany and Plant Pathology.
- Advisor of Outstanding M.S. Student - Valerie Mock (2008). Dept. of Botany and Plant Pathology.
- Coach - 1st Place Graduate Team at NCWSS Weed Science Contest (2008). North Central Weed Science Society.
- Outstanding Graduate Educator Award (2008). Dept. of Botany and Plant Pathology.
- Purdue Agriculture Team Award (2008). Purdue University College of Agriculture.
- Coach - 1st Place Graduate Team at NCWSS Weed Science Contest (2007). North Central Weed Science Society.