Southern Illinois Moth and Beetle Trap Count,
This Week's Activity
Ron's September 2nd comments: The Final 2008 Report
Three flights appear on the increase during this last reporting week of the season. An increased fall armyworm (FAW) moth flight appears to be occurring at the Marion County trap site. That area of the state has a significant amount of late planted corn, grain sorghum and soybeans. Those crops will be the main target for this flight.
From one end of the trap line to the other, the corn earworm (CEW) moth flight just keeps on occurring. The heaviest captures this past week were at the Marion and Pulaski County trap sites. Late maturing corn, grain sorghum and soybeans will also be the main target for this flight.
The third flight of southwestern corn borer (SWCB) moths has officially begun at the southern tip of Illinois at the Pulaski County trap site. It is also beginning to show at the Franklin County trap site. Just like the other two, late maturing corn and grain sorghum will be the crops of interest for this flight.
To recap this year's trap line captures, the most significant captures of fall armyworm moths occurred at the St. Clair County trap site. Although the corn earworm moth flights continued across all trap sites, the largest weekly captures consistently occurred at the Pulaski, St. Clair and Marion County trap sites. Corn tip feeding injury should be the heaviest at harvest in those areas. The south western corn borer moth flights continue to occur most prominently at the near river trap locations at Pulaski and St. Clair Counties. Once again, the European corn borer moth flight numbers remained very low across the entire trap line for the entire year. As expected, the Sangamon County trap site had the only significant captures of western corn rootworm beetles. In fact there were no captures during the entire season at the two southern trap locations in Franklin and Pulaski Counties. While Japanese beetle captures were significant at all locations, the Marion County trap site set a new one week record capture for the trap line of just over 417,000 beetles during the third week of July. The Sangamon County trap site was next with just over 132,400 beetles that same week. The surprise was probably the low captures that occurred this year at the St. Clair County location. The largest one week capture at that location was only a little over 17,000 beetles. For the most part, western bean cutworm moth captures did not occur across the trap line.
The "*" that appears in the Franklin and Sangamon County JB capture columns during the week prior to July 8th is to indicate that due to business travel, the traps at those locations could not be emptied on a daily basis during that week, and they were over-flowing when serviced. Thus, the capture numbers that were entered were not actual totals for the week, but all that we were able to capture.
Following are some helpful web sites for determining insect
development and control recommendations across the southern part
of Illinois:
http://www.ipm.uiuc.edu/bulletin/index.php
http://www.ipm.uiuc.edu/degreedays/index.html
http://www.ipm.uiuc.edu/fieldcrops/corn/insects.html
http://wwwagwx.ca.uky.edu/calculators.html
University
of Kentucky moth trap catch data
University of Missouri Pest Monitoring Network
http://www.ipm.uiuc.edu/fieldcrops/insects/japanese_beetles.pdf
http://www.ca.uky.edu/entomology/entfacts/ef409.asp
http://www.oardc.ohio-state.edu/biocontrol/j_beetle.htm
Until next year.
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