-2- 



l/k pound of endrin or 3 pounds of toxaphene per acre as a "band spray, directed at 

 the base of the plants. Use as much water per acre as possible, and cultivate im- 

 mediately, throwing dirt around the base of the plants to cover the insecticide. 

 Cultivation may not be needed if the soil is exceptionally wet at time of treatment. 

 Fields that are too wet to get through with ground equipment could probably be 

 treated successfully by air if conditions are critical. The same insecticides should 

 be used. 



Full-grown cutworms are difficult to kill with insecticides. Applying 

 insecticides after the damage is done and when most of the worms are full grown is 

 a waste of money. 



If replanting is necessary, apply 1 pound of dieldrin, 3 pounds of toxaphene 

 or 2 pounds of aldrin or heptachlor per acre before planting the field again. Make 

 a broadcast application, and disk the material into the soil immediately. 



Armyworms : Scattered reports of damage continue. Observe rank growths of 

 grain and grasses for the next few days, particularly in the northern one-third to 

 one -half of the state. Armyworms in the southern two- thirds to one -half are mostly 

 mature, and damage will drop off rapidly. 



Several reports of rabbit and rodent damage have been received. These pests 

 cut up the straws into even lengths and usually pile them up. Damaged areas a yard 

 or so in diameter are now noticeable in many fields. 



Armyworms are readily controlled in grain fields with l/h pound of dieldrin 

 or 1 1/2 pounds of toxaphene per acre. Usually it takes 1 to 3 days for results to 

 become apparent. Do not harvest the grain for 7 days after treatment. If treatment 

 becomes necessary in grass pastures to protect the pasture or to prevent migrations 

 to adjacent corn fields, use 2 pounds of methoxychlor per acre. Methoxychlor will 

 prevent the worms from feeding, even though actual kill is poor. When using methoxy- 

 chlor, allow 7 days to elapse between treatment and harvest or pasturing. 



Grasshoppers ; These insects are now hatching and are concentrated in fence 

 rows, roadsides, ditch banks and similar areas. Hard beating rains will kill these 

 small hoppers. The effect on the total population can not be determined yet. 



Bagworms : In many areas these pests are still small enough to control 

 effectively. Apply a spray made with 2 teaspoons of the 57$ malathion concentrate, 

 3 teaspoons of 60$ toxaphene concentrate or 1 tablespoon of lead arsenate per gallon 

 of water. 



Cau tion : Before applying insecticides, read labels carefully and follow 

 all precautions. This not only will insure personal safety, but will eliminate in- 

 secticide residue hazards. 



Special note to vegetable growers ( not for publication ): We have received 

 a wire that Sevin is now registered for corn earworm control at 1.5 to 2.0 pounds of 

 active ingredient as 85$ sprayable powder per acre. No oil is required. Treated 

 fodder and forage may be fed to dairy and beef cattle 7 days after the last applica- 

 tion. There is no time restriction on the ears for market. 



\* mmuuu -j m v 



A A AAArtAAAff 



This weekly report was prepared by H. B. Petty, Illinois Agricultural Ex- 

 tension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Service, Plant Pest Control Branch, from information gathered by ento- 

 mologists and cooperators who send in weekly reports from their own localities. 



HBP: cm 

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