-2- 



The quantity of finished spray applied per acre is also important. Use no less than 4 

 gallons per acre by air or 20 gallons per acre by ground machine. 



Clover- leaf weevil larvae, which can be confused with alfalfa weevil, are also present in 

 both alfalfa and clover fields. Clover-leaf weevils are large, pale-green larvae with 

 white stripes down their back and a tan or brown head; the alfalfa weevil has a black 

 head. Clover-leaf weevils feed mainly at night, hiding down around the base of the plant 

 during the day; alfalfa weevils are found feeding in the terminals during the day. Warm, 

 humid weather enhances the spread of a fungus disease that kills clover-leaf weevils. 

 Parasites also help control them. Clover and alfalfa stands can usually grow away from 

 the damage; however, if damage becomes severe and growth is slow, a spray of 1 pound of 

 malathion per acre is effective. This will also control pea aphids, a few of which are 

 now present in southern sections . 



CORN INSECTS 



European corn borer survival this past winter was normal or above in the northern, western 

 and west -southwestern sections of the state, as shown by a recent survey. A similar surve 

 will be conducted in other areas within the next few weeks. The following survival record 

 were obtained: 



Percent survival 

 County of corn borer 



Greene 82 



Henderson 76 



JoDaviess 76 



Knox 62 



LaSalle 76 



Livingston 88 



Macoupin 84 



Madison 68 



Winnebago 80 



Average 77 



A figure of 70 to 80 percent is considered a normal survival level--above 80 is high, and 

 under 70 is below normal. Statewide, the borer population is higher than it has been 

 since 1955, and it presents a potentially serious problem. The incidence of parasites 

 and diseases among borers is low, so borers are healthy. However, strong winds or beating 

 rains in late May (southern sections) and June (central and northern sections) , when the 

 overwintering moths are emerging, could still eliminate much of the problem. 



Plow cornstalks cleanly and you will eliminate 99 percent of the overwintering borers. 

 Stalk choppers or shredders should be used on stalk fields that are not plowed, or else 

 disk them thoroughly. This will eliminate about 92 percent of the overwintering borers. 



Plant hybrids that are adapted to your area. If you plant your corn early, plan on ap- 

 plying an insecticide to prevent com borer damage. Midseason plantings of corn will 

 have less injury from both first- and second-generation corn borer. 



HOMEOWNER INSECTS 



Scale insects are present on many kinds of trees and shrubs- -lilac, dogwood, Euonymus, 

 tulip, spruce, elm, etc. The scales are in the egg stage beneath the old body-covering 

 of the female scale. Examine the branches of trees and shrubs in your yard for the pres- 

 ence of scales. 





