This past week, varying control of cutworms was obtained by using the carbaryl- 

 molasses spray. Some results have been good- -others fair to poor. In some in- 

 stances, several days passed before control was evident. Emergency cutworm con- 

 trol has always been erratic and tough to achieve. This year is no exception. 

 Several factors appear to be responsible for the poor results. Where the soil 

 was dry, the worms fed beneath the soil surface and did not come in contact with 

 the toxicant. Where the soil surface was moist, the cutworms fed on or near the 

 surface and were killed by the chemical. 



The need for applying emergency treatments will vary from field to field. If the 

 field is too wet thus preventing ground application of an insecticide, an aerial 

 application of the 5-percent apple pomace bait can be used at the rate of 20 

 pounds per acre. 



If replanting is necessary, the cutworms may still be present when the corn comes 

 up. Dyfonate granules at the rate of 2 pounds of actual ingredient per acre, 

 banded ahead of the planter press wheel, will give control. When replanting 

 without disking-out the plants remaining in the old stand, follow the replanting 

 immediately with a carbaryl -molasses spray over the row at 2 pounds per acre. 



Of the cutworm complaints received, about half of the damaged cornfields have 

 been treated with a row or broadcast application of aldrin or heptachlor at 

 planting time. 



Wireworms . More reports of damage to corn by this pest were received this week. 

 If replanting is necessary, use one of the organic phosphate insecticides- -Thimet, 

 Dyfonate, and Dasanit at 1 pound or diazinon at 2 pounds per acre. These will 

 control small wireworms, but may not control the large ones. A rain after appli- 

 cation is helpful. We have had several reports of wireworm- control failure with 

 row treatments of aldrin, heptachlor, and chlordane. 



European corn borers . Pupation of overwintering corn borers is 100 percent com- 

 plete in southern Illinois, where moth- emergence has started and egg-laying is 

 underway. Pupation is 65-percent complete in the central sections of the state, 

 and moth- emergence is just starting. Pupation is just beginning in northern Il- 

 linois. 



True armyworms . More reports have been received of armyworm damage to corn planted 

 after rye and other grasses where a no-tillage system of planting was used. The 

 armyworm moths laid their eggs in the grass. The newly hatched worms are now feed- 

 ing on the corn. For control, use 1-1/2 pounds of toxaphene, or 1-1/2 pounds of car- 

 baryl (Sevin) , or 1 pound of trichlorfon (Dylox) --applied as a spray over the row 

 when damage is present. 



HOMEOWNER INSECTS 



Bean leaf beetles . These are beginning to chew holes in the leaves of green beans. 

 This is a dull-red or brown beetle with black spots. It can be controlled with 

 carbaryl (Sevin) , applied as a 5-percent dust or a spray prepared by mixing 2 

 tablespoons of 50-percent wettable powder in each gallon of water. 



Striped cucumber beetles . Adults are present where young plants of vine crops 

 such as cucumber and squash have emerged. These black and yellow beetles mi- 

 grate to newly emerging plants and chew on the leaves. They often carry a dis- 

 ease called bacterial wilt in their mouths. This wilt kills the plants on which 



