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 HEEBICIDES 

 Special Note to Commercial Vegetable Growers 



The herbicide Prefar has been cleared for use on commercial acreages of squash, 

 cucumbers, muskmelons, cantaloupes, and watermelons. Prefar should be applied 

 before planting and incorporated with the soil. Use Prefar on mineral soils only 

 at rates specified on the label. 



Prefar has shown excellent and sustained control of annual grasses in test plots 

 in Illinois and neighboring states. Some broadleaf weeds are not controlled and 

 Prefar should be used on a small part of your acreage in 1968 to fit your indi- 

 vidual weed problems. Prefar also has clearance on lettuce. 



Corn 



Sales of herbicides this spring appear to have been a little more delayed than in 

 the last few years. Partly caused by a little more conservative attitude on the 

 part of some farmers and partly caused by some reduction in corn acreage, the in- 

 crease in use of herbicides may not be as great as in recent years. 



Although many farmers have delayed their purchase of herbicides until closer to 

 planting time, a high percentage of farmers are or will be using herbicides again 

 this year. 



With the early planting in many areas rain could bring on a weed problem, espe- 

 cially where herbicides were not used. Timely cultivation and properly timed 

 postemergence applications could still keep the weeds under control. 



The rotary hoe is still one of the most effective and economical tools we have for 

 controlling weeds. When the weed fuzz begins to show, it is time to go with the 

 rotary hoe. Once the weed seeds have germinated and the seedlings are "in the 

 white," just about ready to emerge, the rotary hoe can kick out millions of weeds 

 per acre. 



If a herbicide has been used and is holding the weeds in check, there is no big 

 rush for cultivation. But if the herbicide isn't working well enough, don't hesi- 

 tate to use the rotary hoe. The rotary hoe isn't necessarily detrimental to the 

 performance of herbicides. If the weather has been dry and one of the less per- 

 sistent herbicides like Randox hasn't worked within two weeks and weeds are appear- 

 ing, don't wait for miracles. If one of the longer lasting herbicides such as 

 Atrazine has not worked well enough on the first crop of weeds, a rotary hoe can 

 help and enough Atrazine may still be present to control later weeds. 



Postemergence Corn Applications 



If you used no herbicide or if you used a grass killer like Ramrod or Randox on 

 corn, 2,4-D is still one of your most economical and effective treatments for 

 broad- leaved weeds. For best control, apply the 2,4-D early when weeds are small 

 and easiest to kill. You can broadcast 2,4-D over the top of corn until it is 

 about 8 inches high. After that height, use drop extensions down to the nozzles. 



