Infestations of second- generation corn borers on late-maturing corn could be severe in 

 the southern section of Illinois. Moth- emergence is underway, and peak egg-laying can 

 be expected by about July 25 in that area. Some borers are present in most of the com 

 fields that were planted early, and the emerging moths will move to the late-maturing 

 fields that are in the late-whorl to early silk stage to lay their eggs. Check these 

 late-maturing fields during late July or early August for corn-borer egg masses or 

 whorl feeding. 



First-generation borers are pupating rapidly in the central section, and an occasional 

 second- generation moth has emerged. Pupation is just getting underway in the northern 

 section. 



For corn in whorl stage, if 75 percent or more of the plants are showing recent whorl 

 feeding, apply carbaryl (Sevin) or diazinon granules. If the corn has tasselled, look 

 for egg masses. If the average is 1 or more per plant, apply an insecticide after a 

 few eggs have hatched. 



Commercial applicators may prefer to use parathion at 1/2 pound per acre. Sprays by 

 air or high-clearance equipment are effective on tasselled corn. Allow 10 days between 

 treatment and harvest for diazinon and 12 days for parathion. Carbaryl has no waiting 

 period. 



SMALL GRAINS 



Cereal- leaf -beetle quarantines have been imposed on the following, entire counties: 

 Champaign, Christian, Clark, Coles, Cook, Cumberland, DeWitt, Douglas, DuPage, Edgar, 

 Fayette, Ford, Grundy, Iroquois, Kankakee, Livingston, Macon, McLean, Montgomery, 

 Moultrie, Piatt, Shelby, Vermillion, and Will. A quarantine is in effect for parts of 

 these counties: North of a line along the north edge of Township 6 in Effingham; Grove 

 Township in Jasper; Seward Township in Kendall; Road District No. 2 in Menard; East of 

 a line along the East edge of Range 6, West in Sangamon; and Kansas Township in Woodfor* 

 County. Continued surveys may reveal new infested areas; if so, these will be announce' 



For further information on cereal- leaf -beetle quarantine and regulations, contact 

 Mr. Rodney Anderson, Head, Division of Plant Industries, State Department of Agriculturi 

 Emerson Building, State Fairgrounds, Springfield, Illinois 62706; Mr. Burhl McClung, 

 Supervisor in Charge, Plant Protection Division, USDA, P.O. Box 98, Urbana, Illi- 

 nois 61801; or R.M. Puyear, District Supervisor, Plant Protection Division, USDA Box F, 

 Wyanett, Illinois 61379. 



GENERAL 



Grasshoppers continue to pose a threat in many areas. Hot, dry weather increases the 

 likelihood of damage. They will tend to move to the more-succlent crops such as corn 

 and soybeans as the vegetation dries out in roadside, ditchbank, fencerow, waterway, 

 and hayf ield areas . 



For control in roadsides, ditch banks, fencerows, waterways, and other grassy areas 

 (where no crops are involved) , apply toxaphene at 1-1/2 pounds per acre. Do not apply 

 it near fish-bearing waters. 



For control in clover, alfalfa, and hayfields , apply 3/4 pound of carbaryl or 1 pound 

 of malathion per acre. Do not apply to clover or alfalfa fields that are in bloom, sine 

 both insecticides are toxic to bees. 



