Chinch bugs can be found in snail numbers in thin wheat in eastern Illi- 

 nois. Populations are not high, but minor migrations from these fields may occur 

 during the next three weeks as the wheat ripens. Use l/2 lb. of dieldrin in the 

 wheat field margins as migrations begin. 



Armyworms can be found in luxuriant wheat and grasses. No heavy concen- 

 trations have been observed, but they are usually difficult to find until damage 

 occurs. Examine luxuriant growths of grasses and grains. If there is an average 

 of six worms (l/2 inch or longer) or more per linear foot of drill row, treatment 

 will be profitable. Toxaphene, 1 l/2 lb., or dieldrin, l/k lb. per acre, is recom- 

 mended for small grains. Allow 7 days between treatment with dieldrin and harvest 

 and 7 days for toxaphene on wheat, but lk days on barley. 



For beef pastures, use toxaphene, but allow 28 days between last grazing 

 and slaughter, or k-2 days if the animals are being sprayed with toxaphene. For dairy 

 pastures, use 1 l/2 lb. of Sevin or 2 lb. of methoxychlor per acre. Sevin has no 

 waiting period, but do not graze cattle for 7 days when using methoxychlor. 



Bean leaf beetles are now feeding on soybeans. In an occasional field 20 

 to 50 percent of the leaf surface of the new leaves has been eaten. If stands are 

 being depleted, apply 1 l/2 lb. of DDT, l/k lb. of dieldrin or 1 l/2 lb. of toxaphene 

 per acre if needed to protect the stand. Beans ordinarily grow away from this leaf 

 feeding, however. 



Corn borer development continues to be earlier than normal. However, a 

 measurable percentage of overwintering borers are just now pupating. This small 

 percentage of late -developing borers will not emerge and lay eggs for almost three 

 weeks. At this time the most advanced field corn will provide excellent survival 

 of small borers. Such fields should be checked for borer infestations in 2 to 3 

 weeks. 



Sweet corn, particularly early market garden corn, should be treated for 

 borer control as soon as eggs are found hatching. With early -emerging moths already 

 flying, these advanced fields will be particularly attractive for egg laying, and 

 the moths will concentrate in these fields. 



Caution : Before applying insecticides, read the labels carefully and 

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

 eliminate insecticide residue hazards. 



A" AAA vt A K n A 



This weekly report was prepared by H. B. Petty, Illinois Agricultural Ex- 

 tension Service and Illinois Natural History Survey, in cooperation with the USDA 

 Agricultural Research Service, Plant Pest Control Branch, from information gathered 

 hy entomologists and cooperators who send in weekly reports from their own lo- 

 calities. 



6/1/62 



