-5- 



2,4-D--can reduce the seed production of grasses considerably. The smaller the 

 grass, the less Dowpon you'll need. If weeds have made much of a growth, it may 

 pay to clip or chop the stubble before spraying. 



If you have Johns ongrass in wheat stubble and plan to plant corn or soybeans in 

 the field next spring, consider a Dowpon application now for control. Clipping 

 or chopping the Johnsongrass a time or two before spraying will help deplete the 

 food reserves in roots and rhizomes; this generally improves control. 



When the Johnsongrass is about a foot high and is actively growing during warm 

 moist weather, spray with 8 pounds of Dowpon in 50 to 40 gallons of water per acre, 

 Wait at least a week or two before working the soil, in order to give the Dowpon 

 plenty of time to translocate and act on the roots and rhizomes. Unless the 

 Johnsongrass is making good, active growth when sprayed, results may be disap- 

 pointing. 



By spraying Johnsongrass this summer, you can control much of the old Johnsongrass 

 without delaying planting next spring. But you should plan to follow up next 

 spring with a preemergence application of Eptam for corn or Treflan for soybeans, 

 to control Johnsongrass that may come from seed. See Illinois Circular 827 for 

 more details on Johnsongrass control. 



If you see dead clumps of Johnsongrass along roadsides and in other non-crop areas, 

 it means somebody is doing a good job of spraying. Find out who it is and pat 

 them on the back. 



READ THE LABEL AND FOLLOW ALL PRECAUTIONS 



This weekly report was prepared as follows: 



Insects: H.B. Petty, Steve Moore, Roscoe Randell, Don Kuhlman, and Stephen 

 Sturgeon, University of Illinois College of Agriculture and Illinois Natural 

 History Survey. 



Cereal Leaf Beetles: T.J. Lanier, USDA, Plant Pest Control. 



Plant Diseases: M.P. Britton and M.C. Shurtleff, Department of Plant Pathology. 



Weeds: Ellery Knake, Department of Agronomy. 



Ag Communications: Del Dahl. 



The information for this report was gathered by these people, staff members, 

 county Extension advisers, and others, in cooperation with the USDA Agricultural 

 Research Service, Plant Pest Control Branch. 



