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Spring cankerworms : These measuring or inch worms begin to feed on elm 

 leaves just before or as they are emerging from the bud in the early spring. Control 

 when the worms are small will be beneficial. Apply a spray oi k pounds of lead ar- 

 senate, 2 pounds of 50 percent wettable DDT, or 2 quarts of 25 percent emulsifiable 

 DDT per 100 gallons of water as the leaf buds are opening or shortly thereafter. 



Elm leaf beetles : These insects may appear soon in southern Illinois. The 

 small, dirty, yellow to black, spiny larvae will skeletonize elm leaves. They are 

 particularly severe on Chinese elms. To control them, use the same insecticides as 

 for spring cankerworm. 



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. 



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. 



