-2- 



Face flies are generally present on cattle on pasture throughout the 

 northern 3/4 of Illinois- Counts although low (5-10/head) will begin to increase 

 as the new generation of flies emerges. 



For dairy cattle use 0.2$ DDVP in corn sirup brushed on the foreheads of 

 the animals. For beef cattle use a backrubber well saturated with 5$ toxaphene in 

 oil. Allow 30 days to elapse between application of toxaphene on beef cattle and 

 slaughter. Toxaphene should not be used on dairy cattle. 



Spring cankerworms are measuring- or inch- worms that feed on tree leaves in 

 the early spring. Partial to nearly complete defoliation of hackberry and elm trees 

 was observed this week in the western section of the state. For control, apply a 

 spray of k pounds of lead arsenate, 2 pounds of 50 percent wettable DDT, or 2 quarts 

 of 25 percent emulsifiable DDT per 100 gallons of water. 



El m leaf beetles , small, dirty, yellow to black, spiny larvae skeletonize 

 elm leaves. ~The;y are particularly severe on Chinese elms. To control them, use the 

 same insecticides as for spring cankerworms. 



Caution : E^fore applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



********** 



This weekly report was prepared by Steve Moore, Illinois Agricultural 

 Extension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Research Service, Plant Pest Control Branch, from information gathered 

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



