-2- 



In northern Illinois, where armyvorms are less mature, those now present 

 will continue to feed for another week to 10 days. If there are six or more worms 

 per linear foot of drill row in grain, apply l/k pound of dieldrin or 1 1/2 pounds 

 of toxaphene per acre. Do not harvest the grain for at least one week after treat- 

 ment. Do not use the straw until 30 days after application. 



Negro bugs , small round black or reddish-black bugs, have been reported 

 to be congregating in wheat, corn, garden beans and lawns. When numerous, they 

 suck sap from the plants, stunting the plants and causing the leaves to wilt and 

 die. Usually this infect is not a serious pest, and the small amount of injury 

 that may occur floes not justify control measures. However, if the bugs are numer- 

 ous in grain cr lawns and damage is evident, or if moderate to heavy migrations 

 occur from small grains to corn, control measures should be considered. For treat- 

 ing lawns or entire grain fields, apply l/k pound of actual dieldrin per acre. To 

 prevent migrations from small grains to corn, apply 1/2 pound of actual dieldrin as 

 a border 1 or 2 rods into the grain field and into corn fields as far as the bugs 

 are severe. Do not harvest small grain for one week after treatment or use the 

 straw until 30 days after treatment. 



Clover root curculio have been injuring soybeans that have followed clover 

 plow-down. These small gray to light brown snout beetles eat crescent-shaped 

 notches in the leaves and gouge holes in the stem aboveground as well as below. 

 This pest feeds mainly at night and is difficult to find during the day. To con- 

 trol curculio in soybeans, apply 1 1/2 pounds of actual DDT per acre to the affected 

 area. Apply only if plant loss is apparently going to be severe. 



Caution : Before applying insecticides, read the labels carefully and 

 follow all precautions. This not only will insure personal safety, but will also 

 eliminate insecticide residue hazards. 



This weekly report was prepared by H. B. Petty and Steve Moore, Illinois 

 Natural History Survey and Illinois College of Agriculture, in cooperation with the 

 USDA Agricultural Service, Plant Pest Control Branch, from information gathered by 

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



SM:wb 

 6/21/63 



