-3- 



Elm leaf beetles are skeletonizing the leaves of Chinese elms, and to some 

 extent other elm species are affected. These small, dirty, yellow to black worms 

 can be found on the undersides of leaves. If control becomes necessary, carbaryl 

 or lead arsenate sprays are effective. 



Sod web worms are common in lawns. The moths, which have been flying for 

 several weeks, deposit their eggs in the sod. In general, fertility and moisture 

 will enable the grass to grow away from worm feeding. The brown spots now appear- 

 ing in lawns are not due to webworm feeding. In late July and August, a new gen- 

 eration will appear in larger numbers, but grass growing conditions will be less 

 favorable. In central Il l inois, plan to treat with carbaryl or diazinon in early 

 August if inspection reveals tiny worms. 



Tomato hornworms are attacking tomatoes in the southern half of Illinois. 

 These large (up to 3 or h inches) green, white-barred worms with a slender horn 

 projecting from the back eat the foliage ravenously. A carbaryl spray will pro- 

 vide effective control. 



Caution to Those Using Insecticides 



Before applying insecticides, read the labels carefully and follow all pre- 

 cautions. This will not only insure personal safety, but will also eliminate res- 

 idue hazards. 



Special Rote to Farm Advisers, Cooperators and Subscribers: (NOT FOR PUBLICATION) 



Your help is needed . Please advise persons sending us specimens of insects 

 or insect damage to package them properly. Specimens that are just dropped into 

 an envelope and mailed often arrive so badly damaged that positive identification 

 is impossible. Place insect specimens in a small vial or box, then wrap the box 

 and place it in another relatively crush-proof box or tube. 



Put plant specimens with insect damage in a sealed polyethylene bag and 

 mail it in a sturdy box with ample packing. 



Lindane vaporizers - present status . We have been getting questions again 

 about electrical vaporizing devices using lindane as a means of controlling insects, 

 We do not recommend them. We consider them ineffective and a possible health haz- 

 ard in the home. There is no label clearance for their use in private dwellings. 

 A dealer should not sell them to individuals for home use. They should carry the 

 statement, "For Industrial and Commercial Use Only. Not for Home Use." 



This weekly report was prepared by H. B. Petty, Steve Moore, Roscoe Randell, 

 Don Kuhlman and Clarence E. White, Illinois Natural History Survey and University 

 of Illinois College of Agriculture, in cooperation with the USDA Agricultural Re- 

 search Service, Plant Pest Control Branch, from information gathered by entomolo- 

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



Sent by: H. B. Petty 



Extension Specialist 

 in Entomology 



HBP : SM : RR : DK: CEW : gpg 



