The 2010 season could tell the tale whether rootworms are becoming tolerant or resistant to current Bt traits. (DTN/The Progressive Farmer file photo by Jim Patrico) Rootworms Strike Back High Insect Counts, Crop Damage, Show in Some Bt Fields Thu Mar 11, 2010 10:36 AM CST Entomologists are baffled why some Bt corn fields had rootworm damage in 2009. What they do stress is that problems continue to increase as the number of farmers planting insect-resistance-management refuges remains at less-that-desirable levels.

There are more options for postemergence herbicide mixes for Roundup Ready and Liberty Link soybeans. (DTN photo by Greg Horstmeier) New Products Target Resistant Weeds New Herbicide Products Aim for Soybean Market Subscriber Content Wed Feb 10, 2010 10:47 AM CST A new active ingredient and several new generic brands join the list of soybean herbicides this year. Many new products focus on controlling glyphosate-resistant weeds.

With five Kansas kochia populations confirmed as resistant to glyphosate herbicides, it's likely others exist in the state. (Photo courtesy Texas Department of Transportation) Kansas Confirms Resistant Kochia Five Populations of Glyphosate-Resistant Kochia Found Across the State Subscriber Content Wed Mar 3, 2010 07:38 AM CST Continued reliance on glyphosate-based herbicides has led to wider-spread kochia resistance. Kansas State University weed scientists say the issue has reached the point that farmers need to be on the offensive.

Farmers Dave Hula, left, and Jerry Cox, center, discuss yield contest ideas with DTN Agronomist Daniel Davidson during the National Farm Machinery Show. Corn Contest Tips Veterans Share Winning Ideas Subscriber Content Mon Feb 22, 2010 06:42 AM CST So you want to be a yield contest winner? Start by networking with experts. Then set a goal, do your homework and realize it will take several years of testing to find the system that works.

Dr. Dan Davidson discusses how to make easier work of eliminating residue. (DTN file photo) Ask Dr. Dan Break Down Residue Subscriber Content Mon Mar 1, 2010 02:18 PM CST Ask Dr. Dan appears in our sister publication The Progressive Farmer magazine. In this column, DTN Agronomist Dr. Dan Davidson says if you want to supercharge residue decomposition, you should consider feeding the bugs that eat it.