-2- 



For hay crops, apply 3/k lb. of dibrom, 1 lb. of malathion or 1 to 1 1/2 lb. 

 of Sevin per acre. No interval between application and harvest in required for 

 Sevin. Allow h days when using dibrom and 7 days for malathion. Diazinon, 1/2 lb. 

 per acre, can be used on alfalfa, with 7 days between application and harvest. A 

 single treatment of 1 oz. of dieldrin per acre may be applied to hay crops, but not 

 after the new growth is over six to eight inches high or within 35 days of harvest. 



For com or soybeans, apply l/8 lb. of dieldrin or 1 l/2 lb. of toxaphene 

 per acre. Do not apply toxaphene to corn or soybeans to be used for hay, ensilage 

 or stover for dairy cattle or animals being finished for slaughter. Dieldrin, l/8 lb. 

 per acre, may be applied to corn to within kO days of harvest or ensiling and to 

 soybeans to within 60 days of harvest or feeding. One ounce of dieldrin per acre 

 may be applied to soybeans to within 35 days of harvest or feeding. 



Dieldrin, toxaphene and Sevin kill grasshoppers slowly. Do not evaluate 

 control for 2 to h days after treatment. Dieldrin and toxaphene provide control for 

 several days after application; Sevin, for a few days. Diasinon, dibrom and 

 malathion kill a high percentage cf 'hoppers within 2k to 36 hours, and control in- 

 creases only slightly thereafter. 



The fall armyworm , not the true armyworm, is present in small numbers in 

 imm ature corn. These worms feed in the whorl and as the leaves emerge the plant 

 develops a ragged appearance. If control becomes necessary, 1 l/2 lb. of DDT or 

 toxaphene per acre can be used if the corn is not to be used as ensilage or stover 

 for dairy cattle or animals being finished for slaughter. 



True armyworms are still evident in some fields of grasses, grains and 

 grassy corn in northern Illinois, as reported last week. See last week's report for 

 control measures. 



Face fly populations are still increasing. DDVP sirup baits used correctly 

 are providing good control. Back rubbers saturated with % toxaphene, for beef 

 cattle only, have been giving erratic results. Their success depends on how much 

 the cattle use them. 



Caution ; Before applying insecticides, read the labels carefully, and 

 follow all precautions. This not only will insure personal safety, but will also 

 eliminate insecticide residue hazards. 



This weekly report was prepared by H. 3. Petty, Illinois Agricultural 

 Extension Service and Illinois Natural History Survey, in cooperation with USDA 

 Agricultural Research Service, Flant Pest Control Branch, from information gathered 

 by entomologists and cooperators who send in weekly reports from their own localities. 



HBPrdl 

 7/27/62 



