-4- 



late for control. For best results, spray the tree while the worms are still small. 

 Either use carbaryl (Sevin) with 2 pounds of 50 -percent wettable powder in 100 gal- 

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

 water. 



Aphids are presently abundant on some hawthorne trees. These insects are small, 

 green, soft-bodied, sucking insects that congregate on developing buds and leaves. 

 If the insects are numerous and control appears necessary, spray the foliage with 

 malathion (2 teaspoons of 50- to 57-percent emulsion concentrate per gallon of 

 water) or diazinon (2 teaspoons of 25 -percent emulsion concentrate per gallon of 

 water). This treatment will also control mealbugs if present. 



Bag worm eggs have overwintered successfully. Right now it is possible to pick 

 these bags off the evergreens and other shrubs and trees. Destroy them. They are 

 full of eggs which will begin hatching about June 1 in central Illinois. If you 

 hand-pick now, you may not have to spray your evergreens for newly-hatching bag- 

 worms in June. 



If grubs were a problem in your lawn last summer or if you wish to prevent the 

 problem, apply chlordane at 1 1/4 pounds of actual chemical per 10,000 square 

 feet. In established sod, apply as granules or spray on a small area. Then water- 

 in thoroughly, before spraying another small area. For new seedings, mix in soil 

 before planting. Do not plant vegetable root crops in treated soil for five years. 

 This treatment should also eliminate ants and soil nesting wasps from the yard. 



Ticks are already annoying campers, hikers, picnickers, fishermen, and others. Use 

 a repellent on socks, pant cuffs, and exposed parts of the body when entering tick- 

 infested areas (wooded and grassy areas) . A material called DEET (diethyltoluamide) 

 is one of the best tick repellents. 



For control of ticks in home yards, spray grass, weeds, flowers, and low shrub- 

 bery with diazinon, malathion, or carbaryl (Sevin) . Do not apply diazinon to 

 ferns or hibiscus, or malathion to cannaert red cedar, or carbaryl to Boston ivy. 



Clover mites are annoying in some homes. These mites are tiny, orange -to-black 

 moving specks about the size of the period at the end of this sentence. They cover 

 furniture, walls, curtains, window sills, etc. in attempting to find their way 

 outdoors. Pick them up with a vacuum cleaner or use an 0.1-percent pyrethrin spray 

 from a pressurized spray can for quick knockdown. Before fall, remove grass, clo- 

 ver, and weeds next to the foundation- -leaving a strip of bare soil at least 18 

 inches wide. By replanting this strip with such flowers as zinnia, marigold, chry- 

 santhemum, rose, or salvia (which do not attract clover mites) you can prevent 

 clover-mite problems next year. 



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

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

 DUE HAZARDS. 



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

 Don Kuhlman, Illinois Natural History Survey and University of Illinois College of 

 Agriculture, 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. 



