
This dust is a contact and stomach 
poison and will therefore control chewing 
and sucking insects, as it contains Cryolite. 
Cryolite is a stomash poison and combined 
with a new Lethane, namely 71B, makes a 
very effective insecticide. We strongly 


Blister Beetles, Harlequin Bugs and 
stink Bugs are among the most difficult of 
all insects to control, and we would suggest 
that this material be given a thorough trial. 
It will give excellent results if thoroughly 
applied when the insects are small. 
We wish to caution our customers that 
there is no one shot method or one_ shot 
material that will control insects. Several 
applications are necessary, and not neces- 
sarily of the same material. Our experience 


industrial chemical, Ammonium Sulfamate, 
which has undergone extensive evaluation 
during the past three years for the eradica- 
tion of many important weed pests. Ammon- 
ium Sulfamate has been known as a labora- 
tory curiosity in chemistry for approxi- 
mately 60 years, but it was not until a few 
years ago that Du Pont chemists found an 
economical way to produce commercial 
quantities of this chemical compound. First 
used in certain analytical processes, later 
experiments disclosed that it has great 
value in chemical weed control. While much 
experimental work is still in progre,ss re- 
sults so far made available have demon- 
strated the outstanding merit of Du Pont 
Weed Killer in the control of certain weeds. 
ADVANTAGES 
Du Pont Weed Killer contains no poison- 
ous ingredients and may be used safely on 
weed-infested areas without danger to live- 
stock or other animals. 



has been that during the course of a grow- 
Byleewe reed Killer is based on a new 

recommend this All Purpose Dust to our 
many customers. We have added a fungi- 
cide to this dust so that you wil be protect- 
ed from the usual Mildews, Blights and 
Leafspots. It should not be applied to ma- 
ture vegetables at picking time. Vegetables 
should be washed before cooking. 


ing season many different insects are en- 
countered. Different insects attack plants 
in different ways. Different insects are 
controlled best by specific insecticides. A 
contact insecticide generally speaking, is 
hopeless on chewing insects. Stomach poison 
gives better results. .Thus the wise gard- 
ener studies the insects attacking his plants, 
and prepares himself by having two or more 
packages of different insecticides on hand 
before the growing season. 

Du Pont Weed Killer is entirely free 
from fire or explosion hazards. Instead, the 
chemicals in Du Pont Weed Killer have 
definite fire-retardant properties. 
Du Pont Weed Killer exerts only a tem- 
porary soil sterilizing effect when used as 
directed; consequently, treated areas may 
often be utilized for growing purposes dur- 
ing the same season. 
Du Pont Weed Killer contains a high 
proportion of fixed nitrogen which enriches 
the soil, after the weed killing action has 
been dissipated. 
When applied as directed to certain per- 
ennial weeds, Du Pont Weed Killer not only 
affects the foliage to which it is applied but, 
under certain rather specafic conditions, is 
translocated to the roots and thereby com- 
pletely kills all parts of the plant. This 
translocation is affected by the development 
and maturity of the plant, weather condi- 
tions, and moisture content of the soil. 
Tests have definitely shown effective trans- 
location in weeds on which its use is recom- 
mended. 
Poison Ivy is easily killed by DuPont 
Weed Killer. 
PAGE SEVENTEEN 
