-3- 



Sunf lowers . Fields planted to sunflowers last year should be planted to corn this 

 year, rather than soybeans . You can use AAtrex (atrazine) , Banvel (dicamba) , or 

 2,4-D to control volunteer sunflowers in corn. AAtrex can be used either preplant, 

 preemergence , or postemergence ; while 2,4-D or Banvel are recommended as postemer- 

 gence treatments. 



The options for controlling sunflowers in soybeans are limited. Tenoran or Norex 

 (chloroxuron) may provide some control when used postemergence, but this material 

 must be applied before sunflowers are more than two inches tall. Sencor (metri- 

 buzin) , Lorox (linuron) , and Maloran or Bromex (chlorbromuron) may give some con- 

 trol of sunflowers if applied at the higher rates; but control may be erratic and 

 there is some risk of soybean injury. Controlling volunteer sunflowers is definite- 

 ly easier and safer in corn than in soybeans. 



Sorghums . Cultivation plus the use of certain selective herbicides will provide con- 

 trol of volunteer grain sorghum, sudangrass, or sorghum-sudan crosses; also, wild 

 cane or Johnsongrass seedlings. 



Treflan (trifluralin) , Vernam (vernolate) , Cobex (dinitramine) , and Planavin (nitra- 

 lin) can be used preplant to control volunteer sorghum in soybeans. Use the maxi- 

 mum rate recommended for your soil type. Disk slightly deeper than is suggested to 

 control other annual grasses. 



Planavin is not adapted for use on soils with an organic-matter content of more than 

 2 to 3 percent. 



Sutan (butylate) , Eptam (EPTC) , or Princep (simazine) can be used to control volunteer 

 sorghum in corn. Use the maximum, labeled rate for your soil type and incorporate be- 

 fore planting. Eptam often injures corn, but safeners have been developed that de- 

 crease the risk of injury. Eradicane is a formulated mixture of Eptam plus a safener. 

 Protect (naphthalic anhydride) is a seed- treatment that also protects corn from Eptam 

 injury. 



Volunteer corn . There are no good, selective treatments to control volunteer corn-- 

 especially "ear corn." Treflan or Cobex may provide some control of volunteer "ker- 

 nel corn," but do not expect to control volunteer corn arising from "ear corn." Glean- 

 ing the field by hand or with animals is probably best, but the choices outlined 

 may not always be possible or economical. 



NEW CLEARANCES 



Lasso -plus -Bladex (alachlor plus cyanazine) has been cleared as a tank -mix for pre- 

 emergence use on field and silage corn. The recommended rate for Lasso 4EC is 2 to 

 2-1/2 quarts per acre. The recommended rate for Bladex 80W varies from 1 to 2.75 

 pounds per acre, depending on the soil texture and organic-matter content. 



Eradicane (EPTC plus R25788) has received clearance for preplant use in corn. It 

 is a combination of Eptam plus a safening agent to reduce the risk of Eptam injury. 

 Eradicane will be sold in areas where wild cane, Johnsongrass seedlings, and nut- 

 sedge are major problems. In most other situations, Sutan will work just as well 

 and will probably be more economical. 



