
-16- 
each hal f=-dose will vaporize in about an 
hour's: time, Experiment with one or two 
lamps or hot plates to find the proper ad- 
jJustment before fumaigating a house, 
PRECAUTIONS IN FUMIGATING WITH AZOBENZENE 
Since there is little experimental in- 
formation on possible ill-effects of azo= 
benzene vapor to man or animals, it is well 
to observe reasonable precautions. 
We recormend wearing; a felt-pad respira- 
tor when in the houses during; the fumigation, 
and avoiding; unnecessary long exposure. A 
good felt-pad respirator is the Dustfoe res— 
pirator, sold by the !ine Safety Appliance 
Co., Braddock, Thomas and IMead St., Pittsburg, 
Pa., and by Sears Roebuck & Company. 
AZOBENZENE FOR PLANTS OTHER THAN ROSES 
Although developed and recommended esp= 
ecially for roses, experiments indicate that 
azobenzene fumigation is safe and effective 
for control of red spider mite on carnations 
and many other florist crops. <A considereble 
number of large-scale tests have been made on 
carnations in various commercial ranges, with 
no injury other than a slight bleaching of 
open buds of some pink and red varieties. A 
nunber of trials in small to moderate sized 
houses indicate that azobenzene fumigation is 
also safe on chrysanthemuns, gardenias, 
camellias, hydrangeas, geraniums, ivies, cy- 
clanen, kalanchoe, ageratum, cinerarias, prim 
ules, coleus, and a number of other crops, 
but we want to have more and larger scale tests 
on some of these before making unqualified 
recommendations, Azobenzene fumigation is not. 
recomended for sweet peas, as these usually 
evelop rather serious Leaf burn. 
PATE 46 ch 48-40 Hb 4b Th ND + 46 4 ab Ha 
con't from pg. 14 

a very fair distribution of moisture from 
side to side with just soil in the beds. 
On long beds (over 100 feet) we believe 
the water should be introduced in the middie 
of the bed rather than the end, 
We feel our present 9" deep beds are a 
little too deep and believe 6" or 7" of soil 
would be enough. 
The above represents our present view 
of automatic watering of ground beds, but 
are subject to change as we gain experience. 
Many of our ideas come from Cornell and 
others we arrive at by trial and error (most- 
ly error) so that in another year we will 
have more concrete infa@mation to offer. 
ite poate 
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Your editor, 
EOE, 
(Pade 

DR. BLAUVELT EXPLAINS AZOBENZENE FUMIGATION TO INTERESTED FLORISTS 
