-2- 



Keep gardens end berry patches free of overripe and rotting fruits and 

 vegetables. Preventing injury from other insects will help to reduce the numbers 

 of these pests on vegetable and fruit farms. Sprays of sevin, diazinon or malathion 

 help to control them, but it may be necessary to make repeated applications as 

 beetles migrate into the area. Follow the labels on containers for rate of application 

 and interval between treatment and harvest. 



An 0.1 percent pyrethrin spray can be used as a quick knockdown spray at 

 picnics or cookouts. 



The mimosa webworms, which are gray to brown worms, are making nests and 

 beginning to skeletonise leaves of mimosa and honey locust in the southern two-thirds 

 of Illinois. A second generation is expected to develop during the next two months,, 

 If treatment is needed, mix a spray containing 2 teaspoons of 50-57$ malathion, or 

 60$ toxaphene, or 1 tablespoon of lead arsenate per gallon of water. Combining mal- 

 athion and lead arsenate has proved very effective in controlling this pest. 



Face fly populations are increasing noticeably in the northern two-thirds 

 of the state. Observe cattle on pasture between 10 a.m. and k p.m. on clear days 

 to see how numerous these flies are. The problem can be expected to worsen during 

 succeeding weeks. 



For dairy cattle . Brush 0.2$ DDVP in corn syrup on the foreheads each 

 morning. Use a DDVP concentrate and mix with corn syrup as needed. Commercial 

 ready-to-use baits may be ineffective. Dairymen who wish to try a new remedy for 

 face flies should obtain a 2.0$ Ciodrin oil solution. Apply at the rate of 1 to 2 

 ounces per animal as needed, but 2 to 3 applications per week should be adequate. 

 Ciodrin has federal label approval for use on dairy and beef cattle. 



For beef cattle . Use a rubbing device, preferably constructed of cloth, 

 burlap or canvas, and keep it well saturated with a 5«0$ toxaphene-oil solution. 

 Locate these devices surrounding salt, mineral or watering units to insure their 

 use. 2.0$ Ciodrin in oil can also be used on beef cattle conveniently from an 

 automatic sprayer. Apply 1 to 2 ounces per animal 2 to 3 times per week. Allow 30 

 days to elapse between treatment and slaughter when using toxaphene. 



Salt blocks, mineral supplements or other feeds containing either pheno- 

 thiazine or ronnel are not recommended for face fly control even though they may 

 give good control of horn flies. Even though ronnel, not phenothiazine, when fed 

 to beef cattle in small amounts each day, will prevent face fly maggots from devel- 

 oping in the manure, there will be just as many face fly adults on the cattle as 

 before treatment because of migration from neighboring herds. 



Caution : Before applying insecticides, read the 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, Il- 

 linois, for "Safe Use of Pesticides." 



■x- * * * * 



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

 Natural History Survey and Illinois College of Agriculture, 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. 



SM:ss 

 7/12/63 



