-4- 



In spite of occasional injury, 2,4-D is still one of the most effective and least 

 costly treatments for controlling many broadleaved weeds in corn. There will 

 probably be 3 to 4 million acres treated in Illinois again this year. 



Don't wait until corn is tasseling or silking to apply 2,4-D. Apply it early, 

 while weeds are small and are the easiest to kill. 



Banvel-D can give greater control of smartweeds in corn than 2,4-D. But if you 

 plan to use Banvel-D, be fully aware of the possibility of injury to nearby soy- 

 bean fields. See the 1 968 Weed Control Guide or the Agronomy Handbook for more 

 details. If you used atrazine earlier, you very likely do not have a serious smart- 

 weed problem now. Smartweeds are quite sensitive to atrazine applied preemergence 

 or as a very early postemergence treatment. 



2,4-DB may help control a serious infestation of cockleburs in soybeans. It can 

 also help control annual morningglory and giant ragweed. But again, be aware of 

 the risk of soybean injur/. Refer to the 1968 Weed Control Guide for details. 



In addition to the previous clearance (for broadcasting 2,4-DB from 10 days pre- 

 bloom to midbloom) , there is a new clearance for application as a directed spray, 

 when soybeans are 8 to 12 inches tall and cockleburs are 3 inches tall. 



Panicum and crabgrass may be late-season grass problems in cornfields, especially 

 where corn stands are thin or in inbred seed fields where plants are short and 

 there is little shade. With these late grasses, only the seeds near the surface 

 germinate. In some fields, these grasses can be controlled with timely cultivation. 



You may find panicum or crabgrass developing in fields that were treated earlier 

 with atrazine. Ramrod applied shortly before or immediately after crabgrass and 

 panicum germinate might provide satisfactory control, but timing is critical. 

 Directed postemergence applications of Lorox or Dowpon are other possible con- 

 trols, but these should be applied when the grasses are small. Be sure to keep 

 Lorox and Dowpon off the corn leaves. 



If you find a serious infestation of crabgrass or panicum this year, consider 

 planting soybeans and using Treflan next spring. 



Leaflets three --let it be . It may be poison ivy. If you need wall charts to help 

 the kids at summer camp"Tdentify poison ivy ask for Circular 850, Controlling 

 Poison Ivy, available from your Extension adviser in agriculture; or write to the 

 Information Office, College of Agriculture, University of Illinois, Urbana, Illinois 

 61801. 



Amitrole or Amitrole-T is effective for controlling poison ivy. Now is a good time 

 to spray. See Circular 850 for details. A slide set on "Identification and Con- 

 trol of Poison Ivy" is available for loan from county Extension visual libraries. 

 Ask your Extension adviser. 



NOT FOR PUBLI^TION^SPECIATNOTE TO RADIO AND TELEVISION STATIONS 



The 1:45 tape recording from our automatic telephone answering service of the 

 weekly insect report has been expanded for your convenience. 



