For pastured beef cattle, apply a water-base spray of 0.5-percent toxaphene, using 

 1 to 2 quarts per animal every three weeks. Allow 28 days to elapse between treat- 

 ment and slaughter. Compared with spraying, back rubbers are only partially effec- 

 tive against horn flies and stable flies. A 2-percent Ciodrin oil -base spray- - 

 applied at the rate of 1 to 2 ounces per animal every 3 to 4 days from an automatic 

 sprayer--is an excellent way to control flies on pastured beef cattle, if the situ- 

 ation permits its use. 



Forage Crop Insects 



Striped blister beetles have been observed feeding on alfalfa. They rarely do much 

 damage to the plants, but can cause alfalfa that is used as green chop to be un- 

 palatable when these beetles are mixed in the forage. If these beetles are numer- 

 ous in forage, cut and fed in dry lot, they can be controlled with 1 pound of car- 

 baryl (Sevin) per acre. There is no limitation between spraying and harvest. 



Soybean Insects 



Thrips , commonly found last week on the whorl leaves of corn and on soybean plants, 

 have been reduced by rains and rapidly growing corn. These insects rasp the leaves 

 and give the leaves a silvery appearance. 



Homeowner Insects 



Squash bugs are appearing on vine crops in vegetable gardens. As adults, these in- 

 sects are very difficult to kill. Carbaryl (Sevin) will control newly hatched 

 nymphs. Apply as dust or as a thorough spray to both sides of the leaves. Insec- 

 ticides should be applied late in the day to vine crops to avoid bee kill. 



Ants entering homes at this time of year can be successfully controlled with a 

 foundation spray of 2-percent chlordane. For the average-sized house, use 1 pint 

 of 45-percent chlordane in 3 gallons of water and spray the foundation to the point 

 of runoff. Spray cracks and expansion joints around walks and steps. This treat- 

 ment will also reduce many other nuisance insects such as crickets and waterbugs. 



First-generation elm leaf beetles are skeletonizing the leaves of Chinese and other 

 elms in the central and northern Illinois areas. The small, dirty yellow- to-black 

 worms feed on the undersides of the leaves. Commonly, they congregate in large 

 numbers next to the trunk at ground level when ready to pupate. A spray of car- 

 baryl (Sevin) --using 2 pounds of 50-percent wettable powder per 100 gallons of 

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

 water- -is effective. An additional treatment may be needed in late July in south- 

 ern sections for second-generation worms. 



Bagworm hatch is complete in northern Illinois and larvae are feeding. Treatments 

 should be made when the worms are young and easy to kill, before severe damage is 

 done. Carbaryl (Sevin), malathion, diazinon, or lead arsenate are effective. Fol- 

 low directions on the label and check the plants that may be injured if sprayed 

 with the insecticide you are using. 



