DDT is still the insecticide most commonly used for corn borer. Apply 

 1 1/2 pounds per acre as a spray, or 3/k to 1 pound per acre as granules. When 

 spraying, arrange two or three nozzles over the row to cover the upper one- third of 

 the plants, particularly the whorl zone. 



Other insecticides approved for use against corn borer include endrin and 

 toxaphene. Ensilage or stover of corn treated with DDT or toxaphene should not be 

 fed to dairy cattle. Endrin may be used in this case, provided label restrictions 

 are followed. 



Grasshoppers . Control grasshoppers while they are still concentrated in 

 the fence rows, ditch banks, and grass waterways. Use l/8 to 1/4 pound of dieldrin 

 or 1 to 1 1/2 pounds of toxaphene per acre. Do not apply dieldrin to pastures 

 grazed by dairy cattle or animals being finished for slaughter. Toxaphene cannot 

 be used on dairy pastures; it can be applied to pastures for beef animals, but not 

 within 42 days of slaughter. 



Leaf hopper eggs are common on corn in western and southwestern Illinois. 

 These egg masses, often confused with corn borer eggs, are laid in leaf tissue in 

 a fan- or kidney- shaped area. The individual eggs are long and narrow with four or 

 five in each mass. They can not be dislodged easily as corn borer egg masses can 

 be. 



Elm leaf beetle are now abundant on Chinese elm. To control, apply a 

 spray containing k pounds of lead arsenate, 2 quarts of 25$ DDT concentrate, or 2 

 pounds of 50$ DDT wettable powder per 100 gallons of water. 



Caution : Before applying insecticides, read labels carefully and follow 

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

 insecticide residue hazards. 



WtfAIUtfl>U U4iU 



AOrtW A A A A A 



This weekly report was prepared by H. B. Petty, Illinois Agricultural Ex- 

 tension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Service, Plant Pest Control Branch, from information gathered by ento- 

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



HBP:bb 

 6/30/61 



