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Chinch bug adults are plentiful in a few fields where small grain stands 

 are thin, particularly in some areas of eastern and central Illinois. During the 

 next two or three weeks, examine thin stands of small grains for evidence of chinch 

 bug damage. It will appear as prematurely dry or dead areas in grain fields. 

 Corn adjoining such fields may suddently wilt and die. Close examination will show 

 clusters of small red chinch bugs on the stalks. 



To control migrations of bugs from small grains to corn, apply l/2 pound 

 of dieldrin per acre to a strip two rods wide along edge of the grain field and 

 into the corn as far as the chinch bugs have migrated. 



The application to the grain field is important if you want to control 

 chinch bugs before they damage corn. For maximum results, cut and remove the grain 

 prior to application; if you spray standing grain, be sure to allow one week to 

 elapse between the application and harvest of the grain. Do not use the straw for 

 livestock feed. 



Sod webworm moths were flying this past week in central Illinois. These 

 moths will now lay eggs to produce the first generation of larvae, which seldom 

 cause injury. It is the second generation, occurring in late July and August, that 

 is destructive. Therefore, if controls are needed, it will not be until the middle 

 of this summer. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate residue hazards. 



X 'OX XX XXX X 



This weekly report was prepared by H. B. Petty, Steve Moore and C. E. 

 White, Illinois Natural History Survey and Illinois College of Agriculture, in co- 

 operation with the USDA Agricultural Service, Plant Pest Control Branch, from in- 

 formation gathered by entomologists and cooperators who send in weekly reports 

 from their own localities. 



Special to farm advisers- -not for publication . 



Fish kills of a week ago in northwestern Missouri were first attributed 

 to armyworm pesticides. It is now believed that heavy rains washed out the sewers 

 in some major cities. This heavy influx of organic material created a distinct 

 oxygen shortage in the rivers and caused the fish to die. 



A further report by the USDA on the Mississippi river fish kills states 

 that "recent public hearings conducted by the Department did not substantiate 

 assumptions that recent fish kills in the lower Mississippi resulted from the use 

 of pesticides on farms... a major source of pesticide residues was an industrial 

 plant manufacturing the chemicals." 



