For pastured dairy cattle, apply 1 to 2 ounces of an oil-base spray of 

 2 percent Ciodrin, 1.0 percent dichlorvos (DDVP) or 0.1 percent pyrethrins as 

 needed. Water-base sprays of the same materials may be used, but control is less 

 effective. Pay particular attention to the legs and undersides of animals when 

 spraying. 



For pastured beef cattle, apply 0.5 percent toxaphene as a water-base 

 spray at 1 to 2 quarts per animal every three weeks. Cover the animals thoroughly 

 with the spray. Allow 28 days to elapse between treatment with toxaphene and 

 slaughter. 



Upcoming Farm Insect Problems 



Black cutworm moths are present and may be depositing eggs in low spots 

 in cornfields where water has stood during the past few weeks. In the north one- 

 third to one-half of Illinois, look for cutworm damage in such spots during the 

 next few weeks. If small black cutworms should appear, apply 3 pounds of toxap : .yii 

 or 2 pounds of carbaryl (Sevin) as a spray directed at the base of the plants. 



Armyworm moths are extremely abundant. They may deposit eggs in grassy 

 cornfields. Check such cornfields for worms in the north one-third of the state 

 in two or three weeks. If it becomes necessary to control the armyworms, apply 1 

 pound of carbaryl per acre. 



Corn leaf aphid s in small numbers are in cornfields. Now present in 

 grassy weeds, particularly foxtail, they will transfer to corn later. Many people 

 believe that damage from these aphids is greater in grassy fields than in clean 

 cornfields. We have no data on this point. No control is recommended now. 



Corn rootworms can now be found feeding on the corn roots in an occa- 

 sional cornfield. The worms are less than half grown. It is still too early to 

 predict overall abundance and consequent damage. 



The Homeowner's Insect Problems 



Mosquitoes are troublesome in many areas of the state. To reduce mos- 

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

 drained eave troughs, old tires, children's toys, etc. (2) Spray shrubbery and 

 tall grass 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 

 the treatment 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. These strips will kill mosquitoes and flies for four to six weeks. Do 

 not use where tropical fish are present or in pet shops. A 0.1 percent pyrethrin 

 space spray or fog applied from a pressurized can, can be used for quick knockdown 

 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 ex- 

 posed parts of the body. The best mosquito repellent to use is DEEP (diethyl 

 toluamide) . 



