there is a high population of annual grasses (such as giant foxtail and fall panicum) ; 

 then, use a 2-to-l ratio. 



Bladex 80W has also been cleared for application with fluid fertilizers when used pre 

 emergence on corn. Postemergence use has not been cleared. 



Basagran (bentaz on) received an experimental permit for postemergence use in soybeans. 

 Broadleaved weeds controlled are smartweed, cocklebur, velvetleaf, common ragweed, jim 

 sonweed, Venice mallow, and prickly sida. Bentazon will not control annual grasses, 

 and its control of pigweed, lambsquarter, annual morningglory, and yellow nutsedge will 

 vary. However, some of these weeds can be controlled with a preplant or preemergence 

 application of Tref Ian (trif luralin) , Cobex (dinitramine) , Planavin (nitralin), Vernam 

 (vernolate) , or Lasso (alachlor) . 



The Basagran formulation is a 4-pounds-per-gallon, sodium salt of bentazon. The rec- 

 ommended application rate is 3/4 to 1 quart per acre when weeds are in the 2- to 6 -lea 

 stage. Soybeans should be in the 1- to 4-trifoliate-leaf stage. Basagran is cleared 

 up to 1-1/2 quarts per acre for use on pigweed, lambsquarter, yellow nutsedge, and an 

 nual morningglory. 



The addition of Citowett Plus Spreader-Sticker (surfactant) at 0.25 to 0.5 percent, 1 

 volume, may increase the activity of Basagran at low application rates on large, sus 1 

 ceptible weeds such as yellow nutsedge and morningglory. However, adding a surfactant 

 may also increase the chance of injury to soybeans from Basagran. 



Basagran should not be applied to soybeans growing under very high moisture condition 

 since soybean injury is likely to occur. Do not apply Basagran within 65 days of ha; 

 vest. Do not feed treated forage or hay to livestock. 



i 



VOLUNTEER SUNFLOWERS IN WINTER WHEAT { 



These are now appearing. The March 30 issue of this bulletin had a note about weed 

 control in winter wheat. Volunteer sunflowers can be controlled with 2,4-D or Banvel 

 (dicamba) . However, legume underseedings would be injured by Banvel or 2,4-D ester. 

 Sunflowers should have at least two true leaves (not cotyledons or seed leaves) . Ap- 

 ply 2,4-D before the wheat is in the boot stage (head can be felt in the stem). Appl; 

 Banvel before jointing. 



WEED IDENTIFICATION 



Please send questions or weeds you want identified and/or injury samples to the ap- 

 propriate subject-matter specialist: 



Field Crops - -Ellery Knake, N-305 Turner Hall or M.D. McGlamery, N-311 Turner Hal 

 (217) 333-4424. 



Vegetables Crops - -Herb Hopen, 206 Vegetable Crops. (217) 333-1967. 



Turf and Lawn - -A. J. Turgeon, 202 Floriculture. (217) 335-2123. 



Forestry - -L.B. Culver, 211 Mumford Hall. (217) 333-2777. 



Aquatics --R.C. Hiltibran, 273 Natural Resources. (217) 533-6889. 



