ivy is burned, the resin may be changed to tiny soot particles which are carried 

 with the smoke. These particles can cause severe poisoning of a sensitive person 

 ivho gets in the smoke. Since the ire sin is in the stems and roots, poisoning can 

 result from handling these, even during the winter. 



"The best way to prevent ivy poisoning is to learn to recognize and avoid 

 poison ivy. It is possible to develop partial or even complete temporary immunity 

 by using tincture of poison ivy which may be purchased at most drug stores. It 

 should be taken before exposure according to the directions on the bottle. After 

 exposure thorough washing with alcohol or strong soap suds may prevent poisoning if 

 it is done promptly enough. Many solutions and lotions are available for treatment 

 but these seldom do more than relieve the burning and itching temporarily, Li cases 

 of severe poisoning always consult a physician, 



"Poison ivy can be grubbed out and destroyed by persons who are resistant 

 to the toxin. This is hazardous because the resistant individual sometimes becomes 

 sensitive and is severely poisoned. It is usually cheaper and easier to kill the 

 poison ivy with a suitable weed killer, 



"Ammonium sulfaraate (or Ammate) is very effective against poison ivy. It 

 can be applied any time during the growing season after the leaves are fully formed 

 but is most effective if applied during late June or July, It is used at t he rate 

 of 3A to 1 pound per gallon of water. It can be applied with a sprinkling can or 

 sprayer. In either case the foliage should be thoroughly wet with the solution. 

 If the first application does not result in a complete kill, retreating may be 

 done later in -fii e season or the next year, Ammate is effective, nontoxic to humans 

 or animals, noninflammable and very readily soluble in water. On the other hand, it 

 is non-selective and will kill almost all plants if applied in sufficient quantity. 

 It is very corrosive on metals and should never be left in a sprayer longer than 

 necessary. After its use, any sprayer, or other applicator, should be very thorough- 

 ly washed both inside and out. Some spray lime, baking soda or soap powder added 

 to the wash water will help to do a thorough job, 



"The two hormone-like materials, 2,ii-D and 2,i;,5-T may be used either alone 

 or combined, 2,I|.-D used alone has given rather erratic results. Sometimes kill 

 has been excellent, at other little or none resulted. Combinations of 2,li-D and 

 2,U,5-T are often sold under the name of Binsh Killer, These mixtures and straight 

 2,Ii,5-T are very effective against poison ivy. They are prepared as amines or esteis. 

 The amines are almost non-volatile and are safer to ^se than the esters which are 

 more volatile. Since formulations differ, the manufacturer's directions as to di- 

 lution should be followed, 



"Any of these, 2,U-D, 2,li,5-T or mixtures, may be applied as an over-all 

 spray in the summer. The best time is earlyin the season when the ivy is growing 

 rapidly, 



"During t he dormant season a combination of an ester in oil may be used. 

 These are most effective when applied in spring before growth starts, Vifhere the 

 ivy covers the ground, it will be necessary to use this as an over-all spray, vlhere 

 the ivy is growing as a climbing vine, it is necessary to thoroughly wet the stem 

 to a height of only two feet. If the ivy is growing on a desirable tree, care will 

 be needed not to get so much material on the tree that it, too, is killed, 



"2,U-D and 2,i4,5-T are non-corrosive, easily mixed with water, non-toxic 

 to humans and animals, selective, and effective. On the other hand, they must be 

 used around gardens and valuable plants with great care because of the danger from 

 spray drift and volatility. Since they are very difficult to wash from spraying 



