Insecticide Residues 



Some farmers have already broadcast aldrin or heptachlor in preparation for com plant- 

 ing. If you have done this, you must plant corn- -not soybeans. Soybeans planted on 

 soil treated this spring with aldrin or heptachlor will have a definite, illegal resi- 

 due in the beans at harvest. 



LIVESTOCK INSECTS 



The face flies now appearing on cattle are adults that have overwintered. They will 

 soon lay eggs to produce the first generation of new face flies, in mid- to late May. 

 The flies seen now will die before the new generation arrives. Consequently, there will 

 be a period in the early to middle part of May when flies are not noticeable. 



Face flies can be seen now on pastured cattle as well as on cattle in dry lots. These 

 flies have overwintered in sheds, barns, and homes. To help reduce the first genera- 

 tion of face flies, leave the cattle (if possible) on dry lot for another two weeks. 

 Face flies will not reproduce under dry-lot conditions. Insecticide controls applied 

 now will also kill-off the overwintering adults before they lay eggs. One of these 

 measures, taken now, will help delay a buildup of face flies for two to three weeks. 



For insecticide control, use Ciodrin as a water- or oil-base spray, applied to the ani- 

 mals. Follow label directions. Do not apply Ciodrin within one day of slaughter. 



For pastured beef cattle that cannot be conveniently sprayed with Ciodrin, install back 

 oilers or face oilers charged with 5 -percent toxaphene in oil. Do not apply toxaphene 

 within 28 days of slaughter. 



HOMEOWNER INSECT PROBLEMS 



Clover mites are tiny, orange -to -black, moving specks about the size of the period at 

 the end of this sentence. They may cover furniture, curtains, window sills, and walls. 

 Although harmless, clover mites leave a stain when mashed. These mites are now leaving 

 their winter hibernation sites beneath siding and in cracks and crevices. As these 

 mites are warmed by the sun, they move to window sills and walls on the east and south 

 sides of a house or other structure in large numbers. 



For control indoors, pick up clover mites with a vacuum cleaner; or, use a spray of 

 0.1-percent pyrethrum or 0.5-percent dichlorvos (DDVP) for a quick (but only temporary) 

 knockdown . 



To prevent further migration indoors, treat the foundation and house siding up to the 

 first floor window sills and about a 10 -foot strip of lawn adjacent to the house with 

 1 teaspoon of chloropropylate (Acaralate 2E) , 2 teaspoons of dicofol (Kelthane 18.5- 

 percent wettable powder) , or 4-1/2 tablespoons of malathion (50- to 57-percent emulsi- 

 fiable concentrate) per gallon of water. Repeat the spray in seven to ten days, if 

 necessary. 



Later this spring, remove the grass and weeds next to the foundation for a strip 18 to 

 24 inches wide. Very few clover mites will cross this barrier of bare soil in the fall. 



The 17-year periodical cicada is expected to emerge in the northern third of Illinois, 

 beginning in late May. This is Brood XIII. Records from the emergence in 1956 indi- 

 cate that adult cicadas could be present north of a line from Rock Island to Peoria to 

 Paris, as indicated on the map on page 3. 



