-2- 



Insecticides can also "be applied after the damage begins, but timing is 

 critical. Apply 1 l/2 pounds of DDT per acre when 50$ of the leaf surface of the 

 plants have "been eaten. Do not feed the small grain straw to livestock. 



Sawfly leaf miner on hawthorne ; The adult sawflies are now swarming about 

 the host trees in great numbers laying their eggs. These eggs will hatch in a few 

 days, and the young larvae will feed between the leaf tissues causing great numbers 

 of the leaves to turn brown and die. 



Prevent damage to varieties of cockspur hawthorne and the English morello 

 cherry "by spraying with emulsifiable concentrates of dieldrin, lindane, or aldrin. 

 Use one quart of the emulsifiable concentrate per 100 gallons of water or 6 table- 

 spoons per 5 gallons of water. 



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

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

 nate insecticide residue hazards. 



********** 



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 

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



