-2- 



Upcoming Farm Insect Problems 



Black cutworm moths are being taken in light traps in increasing numbers and 

 may be depositing eggs in low spots in cornfields. Be on the lookout for cutworm 

 damage in such spots in the northern half of Illinois during the next few weeks. 

 If small black cutworms should appear, apply 3 pounds of toxaphene or 2 pounds of 

 carbaryl (Sevin) as a spray directed at the base of the plants. 



Corn leaf aphids can be found in the whorl of corn in the south-central and 

 southern sections. Individual aphids — not colonies--are present in corn in the 

 northern half of the state. Aphids can also be found in small numbers in grassy 

 weeds like foxtail and will soon move to the corn. It is too soon to predict over- 

 all abundance and problems with this insect. 



Armyworm moth flight has been heavy for two weeks. Carefully observe grassy 

 cornfields, grass pastures and late-maturing oats in the northern one-third to one- 

 half of the state in the next week or two. The moths may deposit eggs in these 

 fields. If it becomes necessary to control amyworms, apply 1 pound of carbaryl 

 per acre to corn and grasses. 



Spotted alfalfa aphids are present in many fields of alfalfa, but populations 

 are not yet alarming. Hot, dry conditions favor their development, and dakcge in 

 the past has occurred from late July through August and into September. More on 

 this insect later. 



The Homeowner's Insect Problems 



Ants, spiders, sowbugs, roaches and other crawling insects continue to enter 

 hones. If you sprayed the outside foundation wall of your house in May, it will 

 need another application now. Spray the foundation from the sill to the soil to 

 the point of runoff with either 2 percent chlordane or l/2 percent dieldrin. Also 

 spray 2 or 3 inches of soil next to the foundation wall. B-y the liquid emulsion 

 concentrate, and dilute it with water to the proper strength. Spray cracks or 

 expansion joints along porches and around steps. In houses with crawl spaces, it 

 is best to treat the inside of the foundation wall as well as the outside. Po not 

 spray near wells or cisterns. Do not spray shrubbery or flowers, as the oil may 

 burn the foliage. This treatment will control many crawling ins« :ts that migrate 

 into the house from outside and will help to eliminate the need for sprays ir doors. 



Mosquitoes are troublesome in many areas of the state. To reduce rrosq^ito 

 problems, follow these steps: (l) Eliminate standing water in poorly drained eave 

 troughs, old tires, children's toys, etc. (2) Spray shrubbery and tall gras^ and 

 also walls in storm sewers with 1.5 percent malathion. To mix, use 3 ounces of 

 50-57 percent emulsion concentrate per gallon of water. Repeat tie tre .:ment 

 every week or two if necessary. (3) Keep door and window screens in good repair. 

 (k) Hang plastic resin strips (2' x 10") containing 20 percent dichlorvos (DDVP, 

 Vapona), one strip per 1,000 cubic feet of space, or about one per room. Ihese 

 strips will kill mosquitoes and flies for four to six weeks . Do not use where 

 tropical fish are present or in pet shops. For quick knockdown you can use a 0.1 

 percent pyrethrin space spray or fog, applied from a pressurized can, in place of 

 the dichlorvos resin strips. Repeat treatments will be needed with the spray. 

 (5) When entering mosquito-infested areas, apply a repellent to exposed parts of 

 the body. The best mosquito repellent to use is DEET (diethyl toluamide). 



