WHY ARE TWO FORMS OF 2,4-D NEEDED? 
WEEDONE CONCENTRATE 48 contains 3 pounds 
of 2,4-D acid equivalent per gallon, or 39% of the 
ethyl ester in a carrier which our five years of research 
have shown to be the most effective material in its pene- 
trating and killing properties. On the more resistant 
weeds, WEEDONE CONCENTRATE 48 gives a better 
kill than does WEEDAR 64. Rainfall will not alter the 
effectiveness of WEEDONE CONCENTRATE 48, al- 
though rain occurring within two hours after the appli- 
cation of WEEDAR 64 can decrease its effectiveness. 
When weeds must be treated under conditions which 
are not considered to be most favorable (as during a 
drought or after annual weeds have reached the seed 
stage) WEEDONE CONCENTRATE 48 should be used. 
Also, on woody material like poison ivy, poison oak, 
cottonwood, willow and wild cherry, WEEDONE CON- 
CENTRATE 48 has consistently given the best kill. 
WEEDAR 64 contains 68% of an alkanolamine salt, 
or 4 pounds of 2,4-D acid equivalent. The amine salts 
have proved to be more efficient than the sodium salt 
in killing properties. Since the WEEDAR 64 material 
is not volatile and (except in the case of drift) will not 
cause injury to an adjoining crop, it is recommended 
for use in treating a crop adjoining a susceptible one 
such as cotton, tomatoes or peas. We also recommend 
WEEDAR 64 for the easy-to-kill weeds and for pre- 
emergence treatment. Because WEEDAR 64 is a liquid, 
it is more easily and more accurately measured than 
the inorganic salts. It is completely soluble in water, an 
essential feature for the low volume sprayers that 
will be widely used. 
WHEN TO APPLY 
We feel that the stage and rate of growth are the 
most important factors in weed eradication work. Tem- 
perature is not as important as was previously thought. 
Although cooler temperature slows up the action and 
takes longer to produce a kill, the final results are the 
same regardless of temperature. Annual weeds are most 
easily killed by treating any time before they flower, 
preferably when they are small and actively growing. 
The more resistant perennial weeds may require two 
applications, the first one before the early bud or 
flowering stage, and the second in the fall when the 
regrowth is in the rosette stage. WEEDAR 64 should 
not be applied if rain threatens within 2 or 3 hours. 
WEEDONE CONCENTRATE 48 can be used under 
these conditions. 
METHODS OF APPLICATION 
There are many different types of sprayers being 
used for weed control work, and the amount of material 
that they apply varies from 5 to 200 gallons per acre. 
For this reason, all our recommendations are expressed 
in pints of WEEDONE CONCENTRATE 48 or WEEDAR 
64 applied to one acre of ground. In large scale spray- 
