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

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

 treatment and slaughter. Back rubbers, compared with spraying, are only par- 

 tially effective 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 5 to 4 days 

 from an automatic sprayer- -is an excellent way to control flies on pastured beef 

 cattle, if the situation permits its use. 



Homeowner Insect Problems 



The " dive bombers" are back again. Mosquitoes are abundant in many areas, prob- 

 ably as a result of the wet weather during recent weeks. To reduce mosquito num- 

 bers, follow these steps: (1) Eliminate standing water in such places as eave 

 troughs, old tires, tin cans, childrens' toys, storm sewers, etc. (2) Apply a 

 water-base spray containing 1-percent malathion (2 ounces of 50- to 57-percent 

 liquid emulsion concentrate per gallon of water) to shrubbery and tall grass. 

 Repeat the treatment every week or two if needed. (3) Keep screens on doors and 

 windows in good repair. (4) Hang plastic resin strips (2" x 10") containing 20- 

 percent dichlorvos (DDVP)--one strip per 1,000 cubic feet of space, or about one 

 per room. These strips will kill mosquitoes and flies for 4 to 6 weeks. As an 

 added precaution, hang the strips out of reach of children and away from fish 

 bowls and food counters. A 0.1-percent pyrethrin space spray- -applied from a 

 pressurized spray can- -can be used for quick knockdown in place of the dichlorvos 

 resin strips. Frequent treatments will be needed during problem periods. (5) When 

 entering mosquito- infested areas, use a repellent. One of the most effective 

 mosquito repellents is DEET (diethyltoluamide) . (6) For quick knockdown at cook- 

 outs, outdoor parties, or picnics, use either 0.1-percent pyrethrin or 0.5-to-l 

 percent dichlorvos (DDVP) as an oil- or water-base space spray. Spray the mist 

 lightly beneath tables and chairs and into the air for a few feet around the area. 

 Repeat the treatment as needed. 



The brown recluse spider , first found in 1957 in Jackson County, 

 is present as far north as central Illinois. This spider, prob- 

 ably of Southern or Southwestern origin, is apparently finding 

 conditions suitable for development in the state. Just recently, 

 large numbers were found in a school building in one area. Both 

 the male and female brown recluse spiders bite and inject a toxin, 

 but the bite is seldom fatal. A stinging sensation followed by 

 pain usually occurs, the area becomes swollen, a small blister 

 arises, and local pain is intense. Tissues surrounding the bite 

 are killed and gradually slough off over a period of 6 to 8 weeks, 

 leaving a sunken scar the size of a penny to a half-dollar. Some- 

 Brown recluse times, there is a general systemic reaction to the bite. 

 spider 



The brown recluse spider has a dark fiddle-shaped mark on its 

 head and back and is light fawn to brown. It prefers to live in and near build- 

 ings and homes; it spins an irregular web. 



The only other poisonous spiders known to exist in the state are the black widows , 

 they are present throughout the entire state and can be easily recognized by the 

 orange or red hour-glass design on the underside of the abdomen. 



