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The
following document may be of interest: Pest
Status of the Soybean Stem Borer, Dectes texanus, in North America --
Summary of Poster Presented at ESA North
Central Meeting in
We need your help determining the breadth of the infestation. We have very incomplete records of statewide occurrence. The map above shows the counties which have reported infestations of this pest in soybeans since 1985. If you happen to find it in a county that is not shaded on the map I would appreciate either receiving a sample of the infested plants along with a description of where they were found or directions to the field so that I could check out the infestation. Send samples to Phil Sloderbeck, K-State Southwest Research - Extension Center, 4500 East Mary Street, Garden City, Kansas 67846 or send an e-mail message with the location of the field to psloderb@oznet.ksu.edu
The image below shows typical damage caused by the soybean stem borer.
If you want to do some fall sampling for this pest in your county, we would appreciate hearing from you about what you are finding. The following is a suggested sampling procedure. Earliest maturing fields may have the heaviest infestations. In each field, break off 10 plants at or below ground level. Plants should be chosen two at a time from 5 different locations within each field you examine. Split the stalks with a pocket knife, looking for tunneling that starts several nodes above ground, generally where a leaf was attached. Most likely the legless, yellowish colored larvae will be down near the soil level by now. These larvae developed from an egg that was laid on a mid-canopy petiole by an adult beetle in mid-summer. The larvae entered the petiole and worked its way down the leaf petiole into the main stem, where it continued tunneling down to ground level. Record the date of sampling, whether the field was infested, the numbers of plants sampled and the percent of plants that held stem borer larvae or signs of tunnels. Also record the percent of plants that are girdled and have lodged (broken off). Larvae tend to plug the tunnel above them after they girdle a plant. Therefore, if you see lodged plants with no obvious cause, split the stems and stem bases and see if signs of tunneling and a stem borer larva can be found. Stem bases can also be split to get an idea of the infestation that had been present if the field has already been harvested. Varietal information also would be useful if it is available. Return the information to psloderb@oznet.ksu.edu or sschroll@oz.oznet.ksu.edu and you will help us develop a better understanding of the distribution and seasonal abundance of this pest in Kansas soybeans.
For more information refer to:
New (July 2003) publication (sponsored by the Kansas Soybean Commission) on the soybean stem borer now available on the www at: http://www.oznet.ksu.edu/library/entml2/MF2581.pdf
A web page showing pictures of the Soybean Stem Borer and its damage. http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/sbsb2.html
Efficacy of In-Season Applications of Systemic Insecticide to Control Dectes Stem Borers in Soybean. Buschman, Davis and Sloderbeck.Southwest Kansas Research-Extension Center Field Day 2006, Kansas State University, Agricultural Experiment Station and Cooperative Extension Service. Report of Progress 961. pp 65-69.
Efficacy of In-season Applications of Systemic Insecticide to Control Dectes Stem Borers in Soybeans. Buschman, Witt and Sloderbeck. Southwest Kansas Research-Extension Center Field Day 2005, Kansas State University, Agricultural Experiment Station and Cooperative Extension Service. Report of Progress 945. pp 53-55.
SOYBEAN STEM BORER MANAGEMENT TRIALS 2001-2003, Phil Sloderbeck, Larry Buschman, and Randy Higgins, Southwest Kansas Research-Extension Center 2004 Field Day, Kansas State University, Agricultural Experiment Station and Cooperative Extension Service. Report of Progress 927. pp 41-44.
Progress Reports on our soybean stem borer research:
2006:
http://www.oznet.ksu.edu/entomology/extension/InsectInfo/SBSB/ksc06final.pdf
2005:
http://www.oznet.ksu.edu/entomology/extension/InsectInfo/SBSB/ksc05final.pdf
2004: http://www.oznet.ksu.edu/entomology/extension/InsectInfo/SBSB/ksc04final.pdf
2003:
http://www.oznet.ksu.edu/entomology/extension/InsectInfo/SBSB/ksc03final.pdf
2002: http://www.oznet.ksu.edu/entomology/extension/InsectInfo/SBSB/kscfinal02.pdf
Factsheet on the Soybean Stem Borer (1996):
http://www.oznet.ksu.edu/library/entml1/SoybeanS.pdf
Current Distribution Map for the Soybean Stem Borer http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/SBSB2001c.pdf
Historical Distribution Maps for the Soybean Stem Borer http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/sbsbdist.pdf
Progress Report on our soybean stem borer research 8/4/99: http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/sbsb.pdf
SOYBEAN STEM BORER IN KANSAS: A Research Update. M. Kaczmarek, R. A. Higgins,
P. E. Sloderbeck, L. L. Buschman, D. Crook, S. B. Ramaswamy, W. Schapaugh.
Poster presented at the joint meeting of the Entomological Society of America,
Entomological Society of Canada and the Societe d'entomologie du Quebec,
December 2000 in Montreal, Canada.
http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/esaposter00.pdf
Presence and significance of Soybean Stem Borer, Dectes texanus texanus,
in Kansas soybean variety trials. M. Kaczmarek, R.A. Higgins, P.E. Sloderbeck,
L.L. Buschman, W. Schapaugh. Poster presented at the North Central Branch
Meeting of the Entomological Society of America, Ft. Collins, CO. March
2001.
http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/esancb01.pdf
Seasonal Occurrence of Soybean Stem Borer (Dectes texanus
texanus) in Republic County, Kansas. M. Kaczmarek, R.A. Higgins, P.E.
Sloderbeck, and W. Schapaugh. Poster presented at the Annual Meeting of the
Entomological Society of America, San Diego, CA. December 2001.
http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/esa
poster 2001c.pdf
Comparative toxicities of three insecticides to soybean stem borer, Dectes
texanus texanus (Coleoptera, Cerambycidae) adults. M. Kaczmarek, K.Y. Zhu,
R.A. Higgins, and P.E. Sloderbeck.Poster presented at the North Central Branch
Meeting of the Entomological Society of America, East Lansing, MI. March
2002.
http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/esancb02.pdf
Biology and Management of the Soybean Stem Borer in Kansas. Randall A. Higgins, Department of Entomology; Phillip E. Sloderbeck, Southwest Area Extension Office; Lawrent Buschman, Dept. of Entomology, SW Res./Extn. Center; William Schapaugh, Department of Agronomy; Merle Witt, SW Res./Extn. Center; Douglas J. Jardine, Dept. of Plant Pathology.Presented at the Soybean Expo in Topeka Kansas 2003 http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/expo.pdf
Research on the Management of the Soybean Stem Borer in Kansas. Phillip E. Sloderbeck Lawrent L. Buschman and Randall A. Higgins North Central Branch Meeting of the Entomological Society of America, East Madison, Wisconsin. March 2003 and International IMP Symposium Indianapolis, Indiana, April 2003 http://www.oznet.ksu.edu/entomology/extension/insectinfo/sbsb/ncb-esa03.pdf
We will put out more information on our project as the analysis progresses. This research is being sponsored by K-State Research and Extension and a grant from the Kansas Soybean Commission.
K-State Research and Extension is an equal opportunity provider and employer.