Chinch bugs can be found occasionally in thin stands of small grains. 

 Examine dead or dying spots for small red or black chinch bugs. If migration 

 starts, apply l/2 pound dieldrin per acre as a barrier strip two rods into the 

 edge of the grain field and into the corn as far as bugs are wilting corn. Do 

 not harvest the grain for one week after application. 



Clover root curculios have been injuring soybeans that followed red or 

 sweet clover or were adjacent to such crops. This damage occurs on marginal rows 

 or in spots in the field. These small gray to light brown snout beetles eat the 

 leaves and gouge holes in the stem above ground as well as below. They feed mostly 

 at night and are difficult to find during the day. To control curculio on soy- 

 beans, apply 1 l/2 pounds of DDT per acre or l/2 pound of dieldrin. Apply only 

 if plant loss is apparently going to be severe. 



Thrips can be found in the whorl of many corn plants in western and 

 southern Illinois. Their feeding appears as tiny streaks of white mottling on 

 the leaves. When thrips are abundant, the damage may give the field a wilted 

 silvery appearance. The plants rapidly outgrow the damage with the first rain. 

 If control is necessary, 1 pound of DDT per acre banded over the row will be 

 satisfactory. Toxaphene, malathion, and several other insecticides should also 

 provide control. 



Face flies increased this past week. This increase is somewhat later 

 than in previous years and may be a good omen. However, dairymen should begin to 

 spray their cattle with 2$ ciodrin in oil. For beef cattle on pasture, apply 

 ciodrin with an automatic sprayer, or at least provide a backrubber with 5$ toxa- 

 phene. Allow 28 days to elapse between treatment of beef cattle with toxaphene 

 and slaughter. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



For a list of general precautions to use when handling and applying 

 pesticides, write to 280 Natural Resources Building, University of Illinois, 

 Urbana, Illinois, for "Safe Use of Pesticides." 



*'/ V V V. V V V V V 

 A A A A AtvA A A 



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

 White, Illinois Agricultural Extension Service and Illinois Natural History Sur- 

 vey, in cooperation with the USDA Agricultural Service, Plant Pest Control Branch, 

 from information gathered by entomologists and cooperators who send in weekly re- 

 ports from their own localities. 



