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FOR IMMEDIATE RELEASE June 22, I962 



INSECT SURVEY BULLETIN NO. 10 



These weekly "bulletins, prepared by entomologists of the University of 

 Illinois College of Agriculture, Illinois Natural History Survey and cooperating 

 agencies, report general trends in insect populations in Illinois (fruit insects 

 excepted). Check your ovn fields to determine local conditions. 



Grasshoppers ; The situation has changed little during the past week. A 

 few scattered rainstorms may have killed some small grasshoppers, hut these rains 

 were not widespread. Grasshopper populations vary from one locality to another, 

 and each individual should evaluate his own problem. There are areas where insec- 

 ticide control is not necessary, but there are other areas where applications should 

 be made very soon. If grasshoppers were moderate to abundant in your area last year, 

 check carefully for small 'hoppers now. 



Many home owners have reported heavy infestations in lawns and gardens. 

 For this purpose use 2 teaspoons of malathion emulsifiable concentrate per gallon 

 of water. Spray these areas liberally, and observe the interval between application 

 and harvest of vegetables listed on the container. If only the lawn is to be 

 sprayed, you can use aldrin, dieldrin, heptachlor or toxaphene, which will last longer 

 than malathion. 



If small 'hoppers are extremely numerous in diverted acres, fence rows, 

 ditch banks, grass waterways, roadsides and similar areas, apply l/8 lb. of dieldrin 

 or 1 1/2 lb. of toxaphene to areas that will not be grazed or used as hay for dairy 

 animals or livestock fattening for slaughter. Aldrin or heptachlor can also be 

 used in these areas at \/h lb. per acre. 



If treating hay crops or pastures, use 1 lb. of malathion or 3/4 "to 1 1/2 

 lb. of Sevin. (From now on, the rate of Sevin depends on the size of the grass- 

 hoppers.) Allow one week to elapse between application of malathion and grazing or 

 cutting. No interval is required with Sevin. Diazinon can be used on alfalfa only, 

 at 1/2 lb. per acre, with a 7-day interval between application and harvest. Dibrom, 

 a comparatively new insecticide, can be used on alfalfa or red clover hay or pasture. 

 Allow h days to elapse between treatment and harvest. Toxaphene, 1 1/2 lb. per acre, 

 can be used on permanent pastures only, and for beef cattle only. If toxaphene is 

 also being applied to the cattle for fly control, allow 42 days to elapse between 

 last grazing and slaughter. Do not graze dairy animals on toxaphene-treated forage 

 or pasture. 



For corn or soybeans, apply 1 or 2 oz. of dieldrin or 1 l/2 lb, of 

 toxaphene. To protect seedings in small grain, apply 2 oz. of dieldrin or 1 1/2 lb. 

 of toxaphene. Do not treat within one week of harvest of the grain except for 

 toxaphene on barley, when a two-week interval is required. 



Corn borer : Moths are still depositing eggs in north-central and northern 

 Illinois. An occasional very advanced field warrants treatment. In north-central 

 Illinois these fields should be treated right away. In northern Illinois, where 

 eggs are still being laid, treatment, where needed, may be made as late as the first 

 few days in July. 



THE LIBsIMY OF TR£ 

 JUN liD 1962 

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