-6- 



WEED CONTROL IN WINTER WHEAT 



2,4-D will control most troublesome weeds, such as wild mustard. However, 2,4-D 

 does not do a good job of controlling wild buckwheat and smartweed. 



Banvel can be used to control smartweed or wild buckwheat, but is weak on wild 

 mustard. A mixture of 2,4-D and Banvel can be used where wild mustard and wild 

 buckwheat present problems. Do not use Banvel or 2,4-D ester on winter wheat 

 with a legume underseeding. Use 2,4-D amine at no more than 1 pint (a formula- 

 tion of 4 pounds per gallon) to minimize legume injury. 



2,4-D ester at rates up to 1-1/2 pints (the 4 pounds -per- gallon formulation) 

 can be used to reduce the possibility of harvest-time dockage for wild garlic 

 in wheat. The mild winter has favored the growth of wild garlic in some areas 

 this year. The rate given above will be enough to kill legume underseedings , 

 but can reduce aerial bulblet formation of wild garlic. 



Wait until winter wheat has finished tillering before spraying it with 2,4-D or 

 Banvel. Applying herbicides when wild garlic is small will improve control, but 

 will also increase the possibility of wheat injury. Do not treat winter wheat 

 when it is in the boot to soft- dough stage. 



BRUSH CONTROL 



2,4,5-T is not cleared for brush control around drainage ditches, homes, or 

 recreation areas, but Silvex (2,4,5-TP) can be used in these areas. Silvex is 

 sold as an ester formulation under two trade names, Kuron (Doro) and Weedone 

 2,4,5-T? (Amchem) . The esters will mix with water or water-oil mixes. To re- 

 duce cost, combine 2,4-D ester and Silvex. 



LAWN WEEDS 



Balan or Emblem (bene fin) , Dacthal (DCPA) , Betas an (bensulide) , and Tupersan 

 (siduron) are the preemergence herbicides recommended for crabgrass control. 



Tupersan is the only preemergence herbicide that can safely be used on Kentucky 

 blue grass seedlings to control crabgrass . 



Bandane is no longer recommended for use on lawns . Recent research has shown 

 that annual applications may cause thatch development and poor rooting, and may 

 also increase disease susceptability. 



Thatch development has also been observed from annual applications of calcium 

 arsenate . This herbicide is recommended only for use by professionals to con- 

 trol annual bluegrass. 



The best control for crabgrass and other lawn weeds is to develop a dense, vigor- 

 ously growing turf through adequate fertilization, proper mowing, and deep irri- 

 gation during drought periods. 



SPECIAL NOTE TO PESTICIDE DEALERS 



Some aspects of United States Public Law 92-516 are now in effect, some are not. 

 One regulation states that it will be illegal to use a pesticide except as specif- 

 ically labeled. This leads to some confusion concerning tank mixes of two or more 

 pesticides, even though such mixes have been used for many years and have withstood 



