Soybean Insects 



Thistle or painted lady caterpillars are still present and feeding on soybeans. 

 They web the leaves together in a nestlike manner and eat chunks out of the leaf 

 margins in the same way that grasshoppers do. One worm will move a foot or two 

 along the row as it feeds. The larva is covered with dark spines, and the body 

 itself is velvety black with light green stripes running lengthwise. When full 

 grown (1 1/2 inches) the larvae transform into silvery, pink, hard-shelled cocoons 

 found attached to the undersides of the leaves. 



In general, infestations are not serious. Most fields have less than 10 percent 

 feeding damage. Soybeans can withstand considerable defoliation (30-40 percent) 

 before bloom without affecting yields greatly. Toxaphene and carbaryl (Sevin) 

 have both provided good control of this insect. Do not feed soybeans as forage 

 to livestock if treated with toxaphene. 



Homeowner Insect Problems 



Cottony maple scale eggs are hatching, and the young 

 crawlers are moving to the leaves to feed. The eggs 

 appear as cottony masses (like popcorn) on small twigs 

 and branches. This scale is particularly injurious 

 to soft maple but will attack a variety of trees and 

 shrubs . 



Apply control measures within the next week or two to 

 kill the young crawlers before they develop protective 

 coverings . A malathion spray containing 2 teaspoons 

 of the 50-57 percent liquid concentrate per gallon of 

 water is effective. 



Bagworm hatch is now complete in northern Illinois, 

 and larvae are feeding on evergreens and other trees 

 and shrubs . Treatments should be made when the worms 

 are young and easy to kill before severe damage is 

 done. Carbaryl (Sevin), diazinon, or malathion are 

 all effective. Malathion will provide fair control 

 of mites that might be present. Follow label direc- 

 tions and check plants that may be injured if sprayed 

 with the insecticide you are using. 



, , , , , , . Cottony maple scale 



Striped and spotted cucumber beetles are attacking 



vine crops in the home garden. The beetles may kill 



small seedlings and seriously retard or kill older plants. Carbaryl (Sevin) or 



malathion will control these insects. Follow label directions for dosage and 



precautions. Make the application late in the day to avoid injury to bees. 



Mosquito populations continue high in many areas . This is fast becoming another 

 record high year for these insects. To reduce the number of mosquitoes in your 

 yard, follow these steps. (1) Eliminate standing water in such places as eaves, 

 troughs, old tires, tin cans, children's toys, storm sewers, etc. (2) Apply a 

 water-base spray containing 1-percent malathion (2 ounces of 50-57 percent liquid 

 concentrate per gallon of water) to shrubbery and tall grass. Repeat the treat- 

 ment every week or two if needed. (3) Keep the screens on doors and windows in 



