In southern sections, bagworm hatch is complete and sprays should be applied im- 

 mediately. The target date for spraying in the central sections is after June 15, 

 in northern sections after June 30. 



Make plans to apply treatments early this year, while the worms are small and easy 

 to kill and before damage is evident. Carbaryl (Sevin) , malathion, diazinon, or 

 lead arsenate are all effective. Follow label directions and check the plants that 

 may be injured if sprayed with the insecticide you are using. 



Oystershell scale hatch is about complete in the central and southern sections; 

 sprays will control them if applied during the next few weeks. In northern sec- 

 tions, sprays should not be applied until after June 15, when hatch is complete. 

 Careful and thorough sparying with malathion (2 teaspoons of 50-to-57 percent con- 

 centrate per gallon of water) will effectively control oystershell scale. An addi- 

 tional treatment will likely be needed in mid- August for second-generation crawlers. 

 Even though scales are killed by spraying, the scale covering will persist for 

 several months. 



Lilac borers are laying eggs. Spray the lower stems and larger branches (not the 

 leaves) with DDT. To mix, use 3 tablespoons of 25-percent DDT emulsion concentrate 

 per gallon of water. Repeat the treatment every 3 to 4 weeks during the summer. 



In the southern half of the state, first generation elm leaf beetles are skeleton- 

 izing the leaves of Chinese elms, and to some extent other species of elms. These 

 small, dirty yellow- to-black worms can be found on the undersides of leaves. If 

 control becomes necessary, spray with carbaryl (Sevin) using 2 pounds of 50-percent 

 wettable powder per 100 gallons of water or with lead arsenate, using 4 pounds of 

 wettable powder per 100 gallons of water. An additional treatment may be needed 

 for second-generation worms in late July or August. 



Special Reminder: Agronomy Day is June 15 



You'll have a chance to get an up-to-the-minute report on the insect situation at 

 Agronomy Day, June 15, at the Agronomy South Farm, Urbana. The Extension Entomol- 

 ogy staff will be on hand to discuss current insect problems. We'll be happy to 

 discuss specific insect problems you may have in your area. 



Besides insect information, you'll get information on 18 Agronomy Department re- 

 search projects that intended to improve farming. The 3-hour tours of research 

 projects begin at 7 a.m. Tours will leave every 10 minutes thereafter until 1 p.m. 

 If it rains, the group will meet in the east side of the football stadium. 



CAUTION: BEFORE APPLYING INSECTICIDES, READ TOE LABELS CAREFULLY AND FOLLOW ALL 

 PRECAUTIONS. THIS WILL NOT ONLY INSURE PERSONAL SAFETY, BUT WILL ALSO 

 PREVENT RESIDUE HAZARDS. 



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

 Don KuhLman, University of Illinois College of Agriculture and Illinois Natural 

 History Survey, in cooperation with USDA Agricultural Research Service, Plant 

 Pest Control Branch, from information gathered by entomologists and cooperators 

 who send in weekly reports from their own localities. 



