We know you never make mistakes , but just in case you goof and get the wrong her- 

 bicide on the crop, don't panic. The seriousness of the problem will depend on the 

 crop and herbicide involved. If you have a 50-50 chance of crop recovery, you 

 might consider replanting between the rows of the first planting, then saving which- 

 ever planting looks best in a few weeks. The use of a herbicide on a crop for which 

 it is not cleared poses another problem. 



Planavin has received clearance for the use of up to 1-1/2 pounds of active in- 

 gredient (2 pounds of 75-percent wettable powder) on a broadcast basis for soybeans. 

 The previous maximum was 1-1/8 pounds active (1-1/2 pounds of 75-percent wettable 

 powder) . 



How deep you incorporate herbicides will depend on many factors, such as soil 

 texture, speed, and the adjustment of the equipment. As a rule of thumb, most of 

 the herbicide is usually incorporated only about a third to a half of the depth 

 to which equipment is operated. Excessive incorporation may dilute the herbicide 

 and decrease weed control. If incorporation is too shallow, loss of volatile her- 

 bicides may increase. Follow the manufacturer's directions; he is as anxious as 

 you are for the herbicide to work. 



If you have to replant and have used a herbicide, analyze your situation carefully. 

 If you used Randox on corn, you could replant to soybeans with no problem. If you 

 used atrazine on corn, don't replant to soybeans, you can replant to corn and still 

 receive some benefits from the atrazine already in the soil. For other situations, 

 review the characteristics of the herbicides, such as persistence, crop tolerance, 

 and clearance. 



However, you might apply a herbicide when replanting, but weeds usually aren't as 

 much of a problem on late planting. Good cultivation may be all you will need. 



Two general groups of cattails, narrow- and broad- leaf, are found in Illinois water. 

 The narrow- leaf cattails have narrower and smaller leaves but longer seed stock 

 than the broad- leaf cattails. If the two species are present together, crosses 

 can also be present. 



The elimination of these two cattail species with herbicides is easily possible, 

 and the same herbicides are effective against both. Also, herbicides applied 

 prior to the development of the cattail head will help prevent spread. 



Cattail control can be undertaken by applications of dalapon or aminotriazole to 

 the foliage; use 4 ounces of dalapon or 2 ounces of aminotriazole per gallon of 

 water. The effectiveness will be increased by the addition of some liquid house- 

 hold detergent. A second application may be necessary to eliminate the plants 

 that survive the first application. Hand-pulling the new shoots will prevent 

 regrowth. 



In controlling cattails, remember that they help prevent bank erosion, and thereby 

 have some benefit. 



SPRAY EQUIPMENT 



With equipment for applying fungicides, herbicides, and insecticides, nozzle wear 

 is especially important. Experimental tests show that the flow rate of nozzles 

 increases 25 percent after being used on 500 acres. Such a 25-percent overdose 



