tective clothing and avoid spray drift when using this nozzle arrangement , 

 pound of azinphosmethyl (Gutnion) or 3/4 pound of carbophenothion (Trithic 



Carbaryl (Sevin) can be used to control all three of these pests, but do not use it 

 if two-spotted mites are damaging soybeans in your area because it will kill some of 

 their natural enemies. There are no time limitations between application and harvest. 



Malathion will also control all three and can be used even if mites are present. Then 

 are no time limitations on its use when diluted with water. 



Toxaphene gives good control of grasshoppers and bean leaf beetles , but poor control 

 of green cloverworms. Do not apply within 21 days of harvest and do not use treated 

 foliage for silage. 



Spider mites are still a problem in those areas that have had little rain. Even in 

 areas that received the rains, relief from mites was only temporary. Rains, partic- 

 ularly hard beating rains , cleanse the plants of mites and give the plants a chance 

 to grow. But rains or chemical control only give the plants a breather to "get going' 

 again and grow away from mite feeding. If a dry spell occurs, damage can be severe 

 as these mites may be present until frost. 



No matter what chemicals have been used, control of mites on soybeans has always been 

 erratic. If possible, direct the spray to the undersides of the leaves. Place drops 

 between the rows and aim the nozzles toward the rows, pointing upward at a 45-degree 

 angle and backward away from the spray operator. Note: The operator should wear pro- 

 Use 1/2 : 

 lion) per acre 

 to control the mites. These should be applied by experienced commercial applicators 

 only . Wait 21 days with azinphosmethyl and 7 days for carbophenothion between treat- 

 ment and harvest. Do not feed treated soybeans as forage to livestock. 



CORN INSECTS 



European corn borer development has been retarded because of the cool weather. How- jj 

 ever, pupation and emergence will accelerate with warmer weather. Watch the latest 

 developing fields; corn borer moths will concentrate their egg-laying here. Examine 

 fields in the late-whorl to early- silk stages. If you find 100 or more egg masses 

 per 100 plants, apply diazinon or carbaryl (Sevin) for control. 



First- generation populations in northwestern Illinois averaged 7 borers per 100 stalk 

 of corn; in northeastern Illinois the population averaged 2 borers per 100 plants; in 

 western Illinois, 16; in central Illinois, 4; in west- southwestern Illinois, 6; and i: 

 southwestern Illinois the average was 19 borers per 100 stalks of corn. When a first 

 generation population in an area averages 5 or more borers per 100 stalks, the second 

 generation can be moderately severe; when the first-generation population averages 

 over 10, the second generation is very likely to be severe unless weather or corn bor> I. 

 diseases are unfavorable for borer survival. 



In southern and southwestern Illinois, pupation should be complete and emergence of 

 moths quite advanced. Egg- laying is progressing rapidly but little hatch has occurr© 

 Egg-laying should reach its peak during the next 10 days. 



Egg-laying should be progressing rapidly in west -southwestern and western Illinois. 

 Little egg- laying will take place in northern Illinois for about 10 days yet. 



Unfortunately, infection by the microscopic protozoan which kills borers and also 

 causes sterility of the females is at a low ebb in the first generation of corn 

 borers this vear. 



