Would Have Balked! 



f (I series of jour, Dr. C. E. Cross tells Jioiv the arduous 

 eeds that invade our cranberry hogs has been super- 

 nd chemical sprays. 



move the weeds, the vines must be 

 trampled, equipment rolled over 

 them, and their roots disturbed. 



Weeds Thrive on Bogs 



Weeds, like the crop plants with 

 which they compete, need moisture, 

 nutrients, and sunlight to thrive. 

 In a cranberry bog, there is usually 

 plenty of moisture for the various 

 weeds growing there. The bogs, 

 usually flooded during the winter, 

 are frequently reflooded in the 

 spring and fall to protect them from 

 frost (and occasionally to drown 

 insects) , and in the summer to pro- 

 vide irrigation. 



Such wet conditions prevailing on 

 the bogs are ideal for weed growth. 

 The grasses, sedges, and rushes, 

 which constitute the major weed 

 problem, grow up through the 

 vines, spread their leaves above, and 

 take advantage of their height to 

 intercept the sunlight and shade 

 the cranberries. 



Sanding Necessary 



Cranberry bogs must be covered 

 with a layer of sand one-half to one 

 inch thick every three to five years. 

 I'DB (jKiradichlorobenzene) , used 

 for killing peach borers and keej^ing 

 moths out of closets, is scattered at 

 the rate of 71/9 pounds to a square 

 rod and covered immediately with 

 an inch of sand. This kills nearly 



Spike rushes are common weeds on wet cran- 

 berry bogs. Here effective kill by Stoddard 

 Solvent spray is illustrated. 



Plioto Inj J. Richard Beattie 



all the poison ivy and wild bean 

 present. 



Yet, the vines are unaffected and, 

 surprisingly, shoAv greatly increased 

 vigor. This method of eliminating 

 two troublesome perennial weeds is 

 a greatly improved one over the old 

 system of pulling or grubbing out. 



Iron Sulfate Still Valuable 



One of the oldest of weed killers, 

 iron sulfate (sugar of iron or 

 green vitriol) , is still of great value 

 m weed control — several hundred 

 tons of it being used annually. 

 Again, it is the great tolerance of 

 cranberry vines that makes it pos- 

 sible to use this chemical. At the 

 rate of two to three tons scattered 

 evenly to an acre, it will kill several 

 species of ferns, sand spurrey, tear- 

 thumb, and others. With this chem- 

 ical the grower can eliminate at 

 least twenty ferns for every one he 

 could dig out by hand. 



Here is another example of man- 

 hours saved and production in- 

 creased in a modern world of 

 new chemical knowledge directed 

 through proper channels for the 

 ultimate good. 



