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True annyworm moths are still flying. They may he attracted to grassy 

 cornfields for egg laying. Ohserve such fields in northern Illinois for the next 

 two weeks. Carbaryl can be used for control. 



White grubs are damaging soybeans in eastern and central Illinois. They 

 are only half grown and will continue to feed until October. Only one specie is 

 involved and the adult, a June beetle, lays eggs in soybean fields where the rota- 

 tion has included only soybeans and corn for several years. 



It is doubtful if chemicals will be helpful in control. Little can be 

 done this late in the season. 



Stable flies are causing the most annoyance to livestock while horn 

 fly populations are light to moderate. Face fly numbers remain low, at most one 

 to two per animal. For control of these flies on pastured dairy cattle, we recom- 

 mend that two percent Ciodrin in oil be applied for flies. House flies are not 

 especially abundant as yet but control programs using good sanitation and barn 

 sprays should be started. 



Sod webworm moths are flying and will soon deposit eggs for another 

 generation. First generation worms have caused no severe damage as soil fertility 

 and moisture kept the grass growing these past weeks. However, the moths now 

 flying are seeking luxuriant lawns on which to deposit eggs. The worms hatch and 

 begin to feed. Then, as grass growth slows in early August, webworm damage to these 

 lawns will become apparent . 



If your lawn is now luxuriant and you observe scads of moths on your 

 lawn during the next two or three weeks, be prepared to apply two pounds of actual 

 carbaryl (Sevin) or one pound of actual diazinon per 10,000 square feet of lawn. 

 They may be used as sprays or granules. When spraying, use sufficient water to 

 get good coverage. Mow and water before applying. Do not water the lawn for three 

 or four days after application. Do not apply insecticides unless you have seen 

 lots of webworm moths in your yard at dusk. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



****** 



Prepared by H. B. Petty, Steve Moore, Roscoe Randell and Clarence E. White 

 Extension Entomologists, University of Illinois College of Agriculture 



and Illinois Natural History Survey 



****** 



H. B. Petty 

 Extension Specialist 

 in Entomology 



