-2- 



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

 1 l/2 pounds per acre as a spray or 3A 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 he used in this case, provided label restrictions 

 are followed. 



Stored grain insects , With wheat harvest starting, take steps to protect 

 the new wheat from insect attack. Clean out old grain and other debris from in 

 and around the bin. Apply a bin spray of 1.5$ premium grade malathion or 2.5$ 

 methoxychlor to the point of run-off. Do not use DDT for this purpose. 



Treat the wheat with a premium grade malathion protective dust or spray 

 at the rates recommended on the label. Anyone planning to store oats or shelled 

 corn for longer than 6 to 8 weeks would also profit by using this treatment. 

 Treated grain may be fed to livestock or marketed with complete safety. 



Weather conditions of the past 10 days to 2 weeks have affected corn. Do 

 not confuse this general damage by wind, cold weather, and possibly hot sun on 

 tender leaf tissue with insect feeding. This weather damage appeared as a white 

 searing of the leaves, yellow leaves, and broken leaves. It was general throughout 

 a large area of Illinois. 



Caution ; Before applying insecticides, read labels carefully and follow 

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

 nate insecticide residue hazards. 



******** 



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

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

 USDA Agricultural Service, Plant Pest Control Branch, from information gathered by 

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



HBP:bl 

 6/23/61 



