-2- 



In severe infestations to corn, apply 1 pound of malathion per acre. 

 One-fourth pound of parathion or phosdrin may be applied, but only by operators 

 experienced in handling and applying these materials. One day should elapse be- 

 tween applications of phosdrin and harvest, 7 days with malthion and 15 days with 

 parathion. These materials can be applied to sorghums in the early boot stage 

 to control aphids. Allow three days to elapse between application of phosdrin and 

 harvest, 7 days with malathion and 21 days with parathion. 



Northern corn rootworm : The adult, a pale green to yellow beetle, feeds 

 on corn silks. Some areas, particularly in southern Illinois, have infestations 

 severe enough to interfere with pollination. This is particularly true if the 

 hybrid has a tendency to be incompletely pollinated. One and one-half pounds of 

 DDT per acre readily controls these beetles. Do not apply to corn for ensilage or 

 stover. 



Caution : Before applying insecticides, read labels carefully and follow 

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

 insecticide residue hazards, 



S XX - X - XXX - X - XX 



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. 



