-3- 

 CORN INSECTS 



Wireworms can now be found in the top several inches of soil in occasional fields 

 in which corn will be planted. If you have a field in which corn will be planted 

 and you have reason to expect there will be wireworm damage, dig a sample a foot 

 square and six inches deep in each of several spots and examine the soil for wire- 

 worms. We do not know positively how to interpret wireworm numbers but if you 

 find one or more per 2 to 4 square feet, damage is likely to be common. 



Plan to use one of the organo -phosphate soil insecticides normally suggested to 

 control corn rootworms. Diazinon may also be used. 



Black cutworms are always a threat, particularly in overflow ground or in low spots 

 in fields. Plan now to examine such areas just as the corn emerges or shortly af- 

 terward. Watch for early leaf damage or minor cutting of plants. Use an apple 

 pomace -carbaryl pelleted bait for control before damage becomes extensive. 



HOMEOWNER INSECTS 



Root maggots , wireworms , and other soil insects often cause trouble in home vege- 

 table gardens. These maggots tunnel into radish, turnip, cabbage and similar cole 

 crops, especially in the northern part of the state. Wireworms often damage root 

 crops. Where soil insects are a problem, diazinon is the only insecticide sug- 

 gested for control. Apply one ounce of actual diazinon or four ounces of 25-percent 

 liquid concentrate diazinon (Spectracide) per 1,000 square feet. Add these four 

 ounces (one -half cup) to three gallons of water and spray the garden area and then 

 immediately work the insecticide into the soil. At the above rate, diazinon is la- 

 belled for use where any vegetable is grown. Do not use soil insecticides such as 

 aldrin, dieldrin, heptachlor, or chlordane on the home vegetable garden. 



PLANT DISEASES 



SOYBEAN DISEASES 



The USDA discontinued the federal soybean cyst nematode quarantine as of last Sep- 

 tember 30. Because this quarantine has been discontinued, some people assume that 

 the soybean cyst nematode is no longer a problem. This is not the case. 



Nematode infestations were confirmed in Jefferson, Washington, and White counties 

 for the first time during 1972, bringing the number of southern Illinois counties 

 with nematode infestations to twelve. Before 1972, infestations were found in 

 Alexander, Pulaski, Massac, Union, Johnson, Pope, Williamson, Jackson, and Frank- 

 lin counties. Undetected infestations may be present in others. 



The Illinois Department of Agriculture will continue to administer and enforce an 

 Illinois soybean cyst nematode quarantine that is parallel to the old federal quar- 

 antine in all requirements. Soil samples will be taken and will be examined for 

 the presence of the nematode. Regulated areas will be revised to include any new 

 infestations that are found. 



Soybean seed purchased from areas infested by the soybean cyst nematode in Illinois 

 as well as from infested areas in other states should be certified by the depart- 

 ment of agriculture in the state of origin as being free from the soybean cyst nema- 

 tode. This certification must be in addition to the regular seed certification and 

 analysis tags. Used farm machinery and used, mechanized soil-moving equipment pur- 

 chased or moved from infested areas must be cleaned of all soil to the satisfaction 

 of an inspector. A certificate to this effect must accompany the equipment. 



