-3- 



containing 1 to 2 pints of paraquat (2 pounds per gallon, liquid concentrate) and 

 1/2 to 1 pint of dicamba (Banvel, at 4 pounds per gallon of the liquid concentrate) 

 per 100 gallons of water sprayed over an acre. A mixture containing 2,4-D or sil- 

 vex and dalapon (Dowpon) could be used as an alternative. These herbicides should 

 not be used in water intended for irrigation, crop spraying, domestic use, stock 

 watering, or fish production. 



Black plastic sheeting three feet or more wide placed over the marginal and flooded 

 vegetation could be used in place of the herbicide. Weekly mowing and raking of 

 vegetation along the margin would be helpful in reducing the number of mosquitoes , 

 but it is not expected to provide altogether satisfactory results. 



3. For emergency control when mosquito wigglers are present, apply Flit MLO at 5 gal- 

 lons per acre, or No. 2 fuel oil at 10 gallons per acre as a spray applied to the 

 three to four feet of effluent next to the shore. The treatment will need to be 

 repeated every one to two weeks for satisfactory results. 



HOMEOWNER INSECT PROBLEMS 



Elm leaf beetles are skeletonizing the leaves of Chinese and other elms. These small, 

 dirty yellow- to-black worms feed on the undersides of leaves and congregate in large 

 numbers next to the trunk at ground level when they are ready to pupate. A spray of 

 carbaryl (Sevin) or malathion is effective. Spray treatment may be needed again in 

 late July in the southern section of the state to control second -generation worms. 



Cottony maple scale , which resembles patches of cotton or popcorn-like formations, is 

 very common now on the branches of soft maples and other trees and on some shrubs in 

 many areas of Illinois. This scale insect secretes this white wax that covers the 

 branch. In some instances, the population increases until the branches, and occasion- 

 ally the trees, are killed. 



Young scale crawlers move onto the undersides of leaves and will feed on plants until 

 early September. Great quantities of honeydew are excreted. This sticky substance 

 drips on foliage, sidewalks, and automobiles as well as anything else under affected 

 trees. 



The young crawlers feeding on the leaves can be controlled by spraying with malathion, 

 using 1 quart of the 57-percent liquid concentrate per 100 gallons of water. Spray the 

 foliage thoroughly after July 1 when the hatch is complete. Where the infestation is 

 severe, repeat the spray two weeks later. 



Spraying for control has been unsatisfactory in some cases where treatments were ap- 

 plied too early in the summer, before the egg-hatch was complete. Also, in some cases, 

 the pest has been wrongly identified as a disease of maple rather than as in insect. 



Spittlebugs , which appear as small, frothy masses of spittle, are feeding on the nee- 

 dles of juniper shrubs. The insect is inside the frothy mass. These inserts can be con- 

 trolled with methoxychlor , carbaryl (Sevin), or malathion. Do not use malathion on can- 

 naert red cedar. 



WEED CONTROL 



HERBICIDES FOR REPLANTING 



Consider the herbicides you have used already before replanting drowned or injured corn 

 fields to soybeans . Two important considerations are: (1) Will the herbicide remaining 



