-2- 



No economic damage from the clover leaf weevil is expected since the 

 good growing conditions enable the plants to rapidly outgrow the feeding. Also 

 moisture and moderate temperatures are favorable for the spread of a fungus dis- 

 ease that kills these weevils. 



Spittlebugs have been hatching in northern Illinois but economic damage 

 is not expected. 



Pea aphid populations have not as yet begun to increase in alfalfa fields. 

 In fact, these aphids are present only in low numbers thus far. 



Armyworm and black cutworm moths continue to be abundant. They are or 

 will soon be depositing eggs, but worm abundance cannot be predicted now. 



White grubs can easily be found during seedbed preparation in those fields 

 where they damaged soybeans or corn last year. They are hungry and will eat the 

 roots of plants as fast as they develop and may even chew on the seeds before ger- 

 mination. 



Aldrin or heptachlor, 3 pounds per acre, should be applied to corn soil 

 during seedbed preparation to control grubs in these occasional fields. Do not use 

 these two insecticides for insect control in soybean fields. Do not plant soybeans 

 in these grub-infested fields until early June. 



The Homeowner's Insects of the Week 



Bean leaf beetles are damaging newly emerging garden beans. These beetles 

 are green, yellow, tan, or red insects with black bands around the outer edges of 

 their wing covers. They usually have black spots on their backs. The beetles feed 

 on the undersides of the leaves, eating irregular holes in the leaves. Sometimes 

 plants are completely defoliated in a few days time. These adults will continue 

 to feed for several weeks. 



Carbaryl (Sevin) as a spray or ready-prepared dust is effective. For 

 sprays use 2 tablespoons of the 50 percent wettable powder per gallon of water. 

 A second application may be needed if more beetles appear. Good leaf coverage, 

 on both under and upper sides, is important for best control. 



Ants are now entering homes in search of food. Now is an ideal time to 

 spray the outside foundation with 2 percent chlordane or 1/2 percent dieldrin. Buy 

 the liquid emulsion concentrate and dilute it with water to the proper strength. 

 Spray the foundation from the sill to the soil to the point cf runoff. Also spray 

 2 or 3 inches of soil next to the foundation wall. Spray cracks or expansion joints 

 along porches and around steps. In houses with crawl spaces, it is best to treat 

 the inside of the foundation wall as well as the outside. Do not spray near wells 

 or cisterns. Do not spray shrubbery or flowers, as the oil may burn the foliage. 

 This treatment will control other insects that migrate into the house from the 

 lawn and eliminates the need for sprays in the house. 



Caution ; Before applying insecticides, read the labels carefully and 

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

 eliminate residue hazards. 



This weekly report was prepared by H. B. Petty, Steve Moore, Rcscoe Ran- 

 dell, and Clarence E. White, Illinois Natural History Survey and University of 

 Illinois College of Agriculture, in cooperation with the USDA Agricultural Research 

 Service, Plant Pest Control Branch, from information gathered by entomologists and 

 cooperators who send in weekly reports from their own localities. 



Sent by: H. B. Petty 



Extension Specialist 

 mjp.cM.T3D.nm.7.-K„ in Entomology 



