replanting is necessary, use one of the phosphate insecticides (diazinon at 2 

 pounds per acre, Dasanit, Dyfonate, or Thimet at 1 pound per acre) as granules in 

 a 7- inch band just ahead of the press wheel. These insecticides will control the 

 small wireworms , but may not control the larger ones . 



LIVESTOCK INSECTS 



Horn flies appeared for the first time on cattle in pasture this past week in 

 southern sections. Populations are still light but they could build up to eco- 

 nomic levels (50-100 or more per animal) within the next few weeks. 



Face flies have been observed in light numbers on pastured cattle near wooded 

 areas in the central section. These adult flies spent the winter in homes, barns, 

 sheds and probably in protected areas in woods, and they are now laying eggs for 

 the first generation of flies. Before the new spring adults emerge in late May 

 and early June, the flies now present will die. Therefore, during mid-May few, 

 if any, face flies will be present. 



HOMEOWNER INSECTS 



Spider mites are building up on junipers, and some damage has been reported. The 

 mites cause a russetting and browning of the foliage. To detect mites, strike a 

 branch sharply with one hand while holding a white dish or piece of paper under 

 the branch with the other. The spider mites appear as small, moving black specks 

 on a white surface. For control, apply dicofol (Kelthane 18.5-percent liquid con- 

 centrate) at 2 teaspoons ful per gallon of water or 1-1/2 teaspoons ful of 25-percent 

 wettable powder chlorobenzilate per gallon of water. Repeat treatments may be 

 needed. 



Eastern tent caterpillars are feeding on a variety of trees --especially on wild 

 cherry, willow, and fruit trees. These insects spin webs in the tree crotches 

 and feed on the foliage outside their web nests. Some small, wild cherry trees 

 were already completely stripped of their leaves this week. If control is needed, 

 apply a spray containing cabaryl (Sevin) or malathion. For carbaryl, mix 2 table- 

 spoons of the 50-percent wettable powder per gallon of water. For malathion, mix 

 2 teaspoons of the 50- to 75-percent liquid concentrate per gallon of water. 



The tick season is getting into full swing. The peak period of activity is in May 

 and June. Campers, picnickers, hikers, fishermen, and berry pickers are the ones 

 most often attacked. Ticks cling to vegetation along paths in brushy places and 

 the woods. They lie in wait, ready to attach themselves to a passing animal or 

 man. A favorite place for feeding on a person is at the base of the head around 

 the hairline. Certain ticks can transmit Rocky Mountain spotted fever to man. 

 Occasional cases of this disease have been reported in Illinois. 



When entering areas that may be infested with ticks, use a repellent on socks, 

 pant cuffs, and exposed parts of the body. DEET (diethyltoluamide) is a reason- 

 ably effective tick-repellent. It also works well against mosquitoes. To con- 

 trol ticks in such places as home yards, parks, lay grounds, or around the summer 

 cabins, spray the grass, shrubs, and flowers with malathion or carbaryl (Sevin). 

 Do not apply malathion to canaert red cedar, or carbaryl to Boston Ivy. 



You can prevent ants, spiders, waterbugs, centipedes, crickets, and other insects 

 from entering your home by spraying the outside foundation wall with a 1-percent 



