-3- 



Woolybears and other leaf- feeding bristly caterpillars are being observed feeding 

 on corn leaves and silks. Control with insecticides is seldom needed for these 

 insects . 



Soybean Insects 



Green cloverworms are present in some soybean fields in central and northern 

 Illinois. These pale, green worms with white stripes "spring" or jump by rapidly 

 curling and uncurling their body. Damage is not apparent, but the situation bears 

 watching . 



Small-Grain Insects 



Cereal leaf beetles were recently found in Moultrie County, as well as in those 

 counties previously reported. A survey of all 102 counties for this insect has 

 now been completed by the Plant Industry Division, Illinois Department of Agri- 

 culture and the Plant Pest Control Division, USDA. 



Forage Insects 



Young grasshoppers are present in occasional fencerows, roadsides, and ditches, 

 grass waterways and hay fields. They will remain in these areas as long as suc- 

 culent plant growth is present for feeding. When the growth begins to turn brown, 

 these insects will migrate into adjoining soybean and cornfields. 



Since egg hatch is complete, there is only one generation per year and they are 

 concentrated in small areas. Chemical control of these young 'hoppers is most 

 economical and easiest before they migrate into the field crops. Treating these 

 areas with carbaryl (Sevin) at 3/4 pound per acre as a spray is best for grass- 

 hoppers. Diazinon at 1/2 pound, malathion at 1 pound, and naled (Dibrom) at 3/4 

 pound per acre are also effective. When treating forage crops, allow 7 days be- 

 tween treatment and harvest with diazinon, 4 days with naled; there is no waiting 

 period for malathion or carbaryl. 



Homeowner Insect Problems 



Sod webworm moths , which are buff colored, have been observed flying over lawns 

 in towns in the southwestern section of the state, and they are beginning to 

 appear in the central section. This flight is the second-generation of moths. 

 They are laying eggs as they fly in a zigzag pattern just above the lawn. If you 

 notice large numbers of these moths, plan to treat your lawn with an insecticide 

 about 2 weeks later. 



The larvae of the webworm are a gray worm with small brown spots over their back 

 and a black head. They are about an inch long when mature, and live for about 

 4 weeks as a larva. The worms live in silken-lined burrows in the thatch of the 

 lawn, clipping off the grass blades at the base. Brown spots appear in the lawn 

 when worms are numerous, and large numbers of robins will move in to feed on the 

 larvae. By this time, it is usually too late for control. 



To control sod webworms , apply as a spray: (1) 2 pounds of actual carbaryl (Sevin), 

 (2) 1 pound of diazinon, or (3) 1-1/4 pounds of trichlorfon (Dylox) per 10,000 

 square feet (1/4 acre). Apply the amount of insecticide suggested in at least 

 25 gallons of water, and do not water the lawn for 3 days after treatment. Gran- 

 ular forms of the same insecticides applied from a fertilizer spreader can be 

 used in place of the spray. 



