-2- 



G-ras shopper infestations are sporadic. This may "be correlated -with last 

 year's control practices. Infestations are greater where no control was used last 

 year than where control measures were applied. 



If control in fence rows and roadsides becomes necessary, use 2 ounces of 

 dieldrin or I 1/2 pounds of toxaphene per acre. Do not apply near fish-bearing 

 waters. Do not apply to pasture or forage to be used for dairy cattle or livestock 

 fattening for slaughter. 



Barn fly control programs should be started this week. Follow these three 

 steps: 



1. Practice good sanitation; clean fly-breeding areas as often as is 

 practical. 



2. Apply a barn spray material, such as dimethoate, diazinon, or ronnel, 

 to the point of runoff to ceilings and walls of all livestock buildings except 

 poultry houses. Use only ronnel in poultry houses. 



3. Supplement the spray application with spray bait applications, using 

 the same insecticide with a corn sirup and water solution (2-1 ratio). Other in- 

 secticides and baits may be used as supplementary measures. 



Biting flies, such as the stable fly and horn fly, are increasing rapidly. 

 For dairy cattle, apply either a 0.1$ pyrethrin or 1.0$ DDVP oil-base spray at 1-2 

 ounces per animal per day. For beef cattle only, apply an 0.5$ toxaphene water- 

 diluted spray, 1-2 quarts per animal, every three weeks. Allow 28 days to elapse 

 between treatment and slaughter. 



Sod webworm moths have been abundant for the past 10 days to two weeks. 

 They are laying eggs in healthy, luxuriant bluegrass, but not in bluegrass that has 

 been retarded by lack of water and fertilizer. 



If control becomes necessary (circular brown spots in otherwise fast- 

 growing grass), apply insecticide at the first appearance of damage. Apply l/2 pound 

 of DDT, l/8 pound of dieldrin, or 1 to 2 pounds of Sevin in ko to 50 gallons of water 

 per 10,000 square feet. 



Bagworms have been hatching in central Illinois and will be hatching soon 

 in northern Illinois. If small bagworms are abundant, apply control measures as 

 soon as you notice the small bags. For small amounts of spray, use 1 tablespoon of 

 lead arsenate, malathion wettable powder, sevin wettable powder, or 60$ toxaphene 

 emulsifiable concentrate or 2 teaspoons of malathion emulsifiable concentrate per 

 gallon of water. Do not use malathion on Cannert red juniper. 



Caution : Before applying insecticides, read labels carefully and follow 

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

 insecticide residue hazards. 



For a list of general precautions to use when handling and applying pesti- 

 cides, write to 280 Natural Resources Building, University of Illinois, Urbana, Illi- 

 nois, for "Safe Use of Pesticides." 



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

 HBP:dl 

 6/lk/63 i m 



