Dae thai , Balan, Betasan, Bandane, Azak, Tupersan, and several other materials have given 

 consistently good results in crabgrass control. All of these chemicals should be used 

 as directed on the container. Most of the preemergence chemicals are in dry form, and 

 nay be applied with a lawn seeder. Be sure that the spreader doesn't overlap, or that 

 you don't apply too much material in any other way. Calibrate the spreader before using 

 it. An over -application of the chemical can damage the grass. 



VEGETABLE GARDENS 



Last week, we said amiben was also sold as "Begiben" for use in vegetable gardens. It 

 should have been "Vegiben." 



MACHINERY 



SEED TREATMENT 



Laboratory tests on the effects of the diazinon corn-seed treatment show that the effect 

 on the cell fill is slight. Actually, this treatment increased cell fill about 3 per- 

 cent, compared with that obtained using seed corn alone. A decreased in this percentage 

 came about only when the diazinon was not well mixed with the seed and when excessive 

 accumulation occurred in the bottom of the hopper. Therefore, it is important to treat 

 the seed in a separate container and to use the treatment at the recommended rate. 



The 5-percent increase in cell fill from diazinon is close to that from graphite. Other 

 factors such as variations in ground speed, change in cell fill as the hopper empties, 

 and many others will affect cell fill just as much. When properly used, the effects of 

 the diazinon seed treatment on the planting rate should be of little concern. 



READ THE LABEL AND FOLLOW ALL PRECAUTIONS 



This weekly report was prepared as follows: 



INSECTS: H.B. Petty, Steve Moore, Roscoe Randell, Don Kuhlman , and Tim Cooley , College of 

 Agriculture, University of Illinois at Urbana-Champaign , and the Illinois Natural History 

 Survey . 



WEEDS: Ellery Knake and M.D. McGlamery , Department of Agronomy, J.D. Butler and H.J. Hopen , 

 Department of Horticulture, R.C. Hiltibran, Illinois Natural History Survey. 



MACHINERY : J.C. Siemens, Department of Agricultural Engineering . 



AG COMMUNICATIONS : Del Dahl. 



The information for this report was gathered by these people, staff members, county Exten- 

 sion advisers, and others, in cooperation with the USDA Agricultural Research Service, 

 Plant Pest Control Branch. 



