INSECT 



SURVEY 



BULLETIN 



*/ry of ^ 



County 



Local Groups 



College of Agriculture 



University of Illinois 



and Natural History Survey, Urbana, Illinois 



U. S. Department of Agriculture Cooperating 



FOR IMMEDIATE RELEASE 



November, 1968 



Illinois Insect, Disease, and Weed Survey Bulletin No. 24 



SPECIAL ISSUE 



INSECTICIDE RECOMMENDATIONS 





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We receive many inquiries about changes in recommendations during the fall of each 

 year, but prior to the publication of printed circulars. We are sending you these 

 Tentative Special Suggestions and Major Changes for 1969 to help answer your "early" 

 questions. Caution statements , time limitations between application and harvest, 

 and other precautions are not included. These tentative suggestions will appear 

 in final form in the University of Illinois College of Agriculture Circular 899, 

 which will be sent to the printers by November 25, 1968. These statements have 

 been reviewed by entomologists of the Illinois Natural History Survey and the Uni- 

 versity of Illinois College of Agriculture, and were prepared by H.B. Petty, Steve 

 Moore, Roscoe Randell, and Don Kuhlman from information gathered by entomologists 

 in Illinois and the USDA Agricultural Research Service. 



Dairy Farms 



As in the past, dairy farmers are cautioned against the use of the chlorinated 

 hydrocarbon insecticides --aldrin, chlordane, dieldrin, DDT, endrin, heptachlor, 

 or lindane--to avoid the possibility of illegal residues in milk. 



Because of possible drift, do not apply sprays or dusts of aldrin, DDT, chlordane, 

 dieldrin, heptachlor, or lindane to fields adjacent to dairy- hay, pasture, or 

 ensilage crops. 



Soybean Farms 



On the basis of research and the results of random surveys of Illinois soybeans, 

 we suggest to Illinois soybean producers the following limitations on the use of 

 certain insecticides in 1969: 



1. Do not use the soil insecticides aldrin, chlordane, dieldrin, endrin, heptachlor, 

 or lindane as a soil or foliar treatment for soybeans. 



2. At present, if either aldrin or heptachlor have been applied annually in a 

 field for 5 or more years, allow 2 years to elapse from the date of the last 

 application before planting soybeans. Thus, if aldrin or heptachlor was ap- 

 plied to a field from 1964 through 1968, do not apply aldrin or heptachlor in 

 1969; do not grow soybeans in this field until 1970. If corn is grown, use one 

 of the suggestions for rootworms listed on page 2. 



