-5- 



the soil, soil moisture, and weather. Hopefully, the manufacturer will add a 

 "safening agent" to further reduce the possibility of injury next year. 



Soybeans have had their problems, too. In fields with "sick" beans, it is often 

 difficult to attribute the problem to only one, definite cause. The variety, seed 

 that lacks good vigor, wet conditions, compact soil, diseases, some effect from 

 last year's or this year's herbicides, and the vagaries of nature can all be con- 

 tributing factors . Any one of these factors alone may not be too serious ; but the 

 more of them you have, the greater the stress and the more the effect is noticeable. 



If the field record, pattern of injury, and symptoms indicate that herbicides are 

 the main problem, you can usually replant to soybeans with less risk of injury- - 

 provided that the herbicide application was close to the recommended rate and ap- 

 plied uniformly. Favorable conditions and adequate time for the dissipation of 

 some of the herbicide are also essential. 



In selecting a variety for late planting, consider going to the next -earlier -maturing 

 group. Another suggestion would be to select a fairly tall variety. If you are un- 

 certain whether the soybeans will get worse or better, consider planting between the 

 rows and then cultivating out whichever planting looks worse. 



THE NAME OF THE GAME 



The possibility of herbicide injury is part of using herbicides. If you are not 

 willing to risk herbicide injury, do not use herbicides. If you are feeling sad 

 about a little corn or soybean injury from herbicides, look across the fence at 

 your neighbor's weedy field where he did not take time to apply herbicides this 

 year and where it has been too wet to cultivate. Weeds can severely stunt corn 

 and reduce yields, too. But of course, that is "natural." 



WEEDS IN SMALL GRAIN 



The only herbicide cleared for treating weeds shortly before the harvest of small 

 grain is 2,4-D. It can be applied from the dough stage to harvest. 2,4-D is cleared 

 for barley, oats, and wheat. 



WILD SWEET POTATO IN CORN 



Use the regular rate of 2,4-D. Timing is critical. Treat at the bud stage just 

 before the wild sweet potato flowers begin to develop. 



WEED-CONTROL PLOTS NEAR DE KALB 



These plots at the Northern Illinois Agronomy Research Center southwest of DeKalb 

 are marked. You are welcome to visit the field and review the plots at your con- 

 venience. The field is located one mile east of Shabbona and 4-1/2 miles north. 



PLANT DISEASE CLINIC 



The following diseases were identified in the plant disease clinic during the peri- 

 od June 11-25. Also listed are the corresponding Reports on Plant Diseases (RPD's) 

 for each disease. These publications, which detail symptoms, disease cycles, and 

 controls, are available from the Department of Plant Pathology, University of Illi- 

 nois at Urb ana -Champaign, 218 Mumford Hall, Urbana, Illinois 61801. 



