It will require about four weeks to bring an existing Indian meal moth infestation 

 under control with the dichlorvos strips. For immediate control of the moths, ap- 

 ply a pyrethrin spray to the surface of the grain, sidewalls, and ceiling, or use 

 a grain fumigant. 



LIVESTOCK INSECTS 



Cattle . Face fly and stable fly populations were higher than normal on pastured 

 cattle during the summer of 1973. The above-normal rainfall in most areas was 

 favorable to fly development. Animal treatments with 1- to 2 -percent crotoxyphos 

 (Ciodrin) water- or oil -base sprays applied at 1 to 2 ounces per animal two to four 

 times per week or 1 -percent water -base spray applied at 1 pint per animal per week 

 gives the best control of the fly complex on pastured cattle. Excellent control of 

 face flies, horn flies, stable flies, and horse flies was obtained on a herd of pas- 

 tured beef cattle treated with a water-base spray of 1.25-percent Ciovap (1.0-percent 

 crotoxyphos + 0.25-percent dichlorvos) applied from a tractor -powered mist blower. 

 Three ounces of spray material was applied per animal per treatment, with about 1 

 ounce of spray actually impinging per animal. A total of about 8 minutes was re- 

 quired to treat the herd. Total time for mixing, applying, and cleaning the spray- 

 er was about 30 minutes. Treatments were applied every 3 to 4 days during the peak 

 fly period (July and August). Because of its convenience and effectiveness, this 

 method of application has been added to our control suggestions. 



Rabon was registered for use in dust bags and back oilers for control of flies at- 

 tacking both dairy and beef cattle in 1973. Three years of testing insecticide dust- 

 bag treatments on cattle using crotoxyphos (Ciodrin) , coumaphos (Co-Ral) , Rabon, 

 and prolate have shown that these devices effectively control horn flies but not 

 face flies and stable flies. An increasing number of beef and dairy farmers are 

 using dust bags because of their convenience (animals treat themselves) and rela- 

 tively low cost. We rate insecticide dust-bag and back-oiler devices as a second- 

 rate method of controlling flies on cattle. 



Horses . For control of flies and mosquitoes attacking horses on pasture, use 1. 25- 

 percent Ciovap as a water-base spray or sponge-on treatment. Apply the spray at 1 

 pint per animal per week or 1 to 2 ounces per animal per day (spray or sponge on) . 

 Use rubber gloves when sponging on the insecticide. Lice can be safely and effec- 

 tively controlled on horses with a 0.5-percent malathion water-base spray. Cover 

 animals thoroughly to saturation and repeat in 14 days. 



LAWN INSECT CONTROL 



We have dropped our recommendation of applying chlordane as a preventive treatment 

 for control of annual white grubs in lawn areas. The only effective insecticide 

 labelled for use is diazinon applied at the rate of 5 pounds of actual ingredient 

 per acre. Also, the insecticide should be drenched into the upper inch of soil for 

 it to be effective. This is done most effectively by soaking the treated area with 

 a lawn sprinkler. Annual white grubs, if a problem, will attack the roots of grass 

 from August through October. 



PESTICIDE TRAINING SCHOOLS: DATES TO REMEMBER 



26th Illinois Custom Spray Operators Training School 



January 9, 10, Illini Union Building, University of Illinois, Urbana- Champaign 



