INSECT 



SURVEY 



BULLETIN 



#»'%, 



'*//,«** 



# 



College of Agriculture 



University of Illinois 



and Natural History Survey, Urbana, Illinois 



County 



Local Groups 



U. S. Department of Agriculture Cooperating 



FOR IMMEDIATE RELEASE 



ouh - c ■-, 





INSECT SURVEY BULLETIN NO. 10 



June 16, 1967 



This series of weekly bulletins provides a general look at the insect situation 

 (fruit insects excepted), along with suggested, abbreviated control measures. 

 Each individual should check his own fields to determine local conditions . 



Small Grain Insects 



Armyworms continue to cut heads and migrate to adjacent corn from ripening wheat 

 fields . In the southern third of the state, the worms have matured (pupated), and 

 treatments are no longer needed. In the central sections, the worms are rapidly 

 maturing and pupating; treatments should not be needed after June 21. The wheat 

 crop is mature enough so that leaf feeding is no longer important. 



If armyworms are eating only the leaves on wheat, ignore them. But if they start 

 to cut heads or migrate, estimate the population and possible damage, and apply 

 toxaphene if necessary. Large numbers of armyworm moths will emerge in another 

 2 to 5 weeks and fly northward. Late-maturing oats, grassy cornfields, grass pas- 

 tures, and hay fields should be checked for the presence of armyworms in early- 

 to-mid July in the northern third of the state. 



Use 1 1/2 pounds per acre of toxaphene for armyworm control in small grains. For 

 migrating worms , treat a strip 1 to 2 rods wide in the wheat and a strip in the 

 cornfield, using 2 pounds of toxaphene per acre. There are no restrictions on 

 the use of the grain. Do not feed the straw or corn forage to dairy animals or 

 livestock fattening for slaughter. Do not contaminate fish-bearing waters with 

 toxaphene . 



We have suggested that dairy farmers not use chlorinated hydrocarbons on their 

 farms. Toxaphene belongs to this group of chemicals. However, the official label 

 permits its use on dairy farms. If it is used on or adjacent to dairy farms, avoid 

 drift onto pastures and hay crops . 



A few live specimens of the cereal leaf beetle were found recently in Vermilion, 

 Kankakee, Iroquois, Woodford, and Edgar counties --according to Mr. Robert Bills, 

 Plant Pest Control Division, Agricultural Research Service, USDA. This is the 

 first time the beetle has been found in Woodford and Edgar counties. Plans are 

 underway to conduct eradication spray programs in each area sometime in July and 

 again next spring. 



