DDT Compositions Produced by Geigy Co., New York 
(Originators of DDT) 
Due to difficulties encountered in preparing compositions of 
GNB—A—DDT satisfactorily for application in sprays and 
dusts, it has been the object of Geigy Co. to develop a wide 
range of tested products that can be expected to give satisfac- 
tory performance in the uses for which they are intended. 
Considering the different methods by which GNB—A—DDT 
can be applied in emulsions, oil sprays, dusts, wettable pow- 
ders, etc., and the different dosages required by users for dif- 
ferent purposes, a rather large number of different products is 
involved. This may lead to some confusion unless the follow- 
ing descriptive notes and the accompanying samples are re- 
ferred to. 
Note that whenever a number occurs in the designation of 
a product, it refers to the percentage of GNB—-A—DDT by 
weight. It will be helpful if requests for materials include the 
designations of the products as underlined below. 
AGRICULTURAL DUSTS 
These are designated as Gesarol A3 Dust, Gesarol A5 Dust, 
etc. 
In general the A3 Dust has proven satisfactory. However, 
against some of the more resistant pests, the 5% dust has given 
significantly better performance. 
We are also preparing a Gesarol A3 Sulfur Dust (70% sul- 
fur) and a Gesarol A3 Copper Dust (7% metallic copper) 
where these fungicides are needed. 
For those who wish to.-make their own blends, Gesarol Dust 
Concentrate should be used. This concentrate has just re- 
cently been developed and contains 40% GNB—A—DDT. It 
can be diluted in any ordinary mechanical mixing device with- 
out additional grinding. 
AGRICULTURAL SPRAYS 
Gesarol AK 40 Spray contains 40% GNB—A—DDT and is 
a wettable powder that forms stable water suspensions. It con- 
tains no wetting agent or spreader and can therefore be used 
in a wide range of applications. It is well adapted to use with 
Wettable sulfur and Bordeaux mixture and is compatible with 
summer oil emulsions; with a small amount of albumin, casein 
or other spreader, raw spray oil can be tank-mixed with this 
product. Due to its stability in suspension it can be used in 
concentrated sprays for spray-duster or airplane application, 
or in soil treatments as water suspensions. 
Gesarol A20 Spray is designed as a complete spray with 
good wetting properties and has high stability in suspension. 
This spray is designed for use on corn, onions, cabbage, etc., 
but should not be used on fruit trees because of a high degree 
of run-off. It is satisfactory against susceptible insects on 
ornamentals where a visible deposit is undesirable. This prod- 
uct should not be used with sulfur and copper fungicides in 
most cases due to the loss of deposit caused by it. 
Gesarol Summer Oil Spray 20 is an emulsible oil base 
product containing 20% GNB—A—DDT and a light summer 
oil. It forms a quick-breaking type of emulsion and should 
only be used in a power sprayer. Emulsification is most easily 
accomplished by pouring the oil into a bucket and turning 
the spray gun into it or by adding the oil to the tank with the 
pump and overflow running when the water is just over thé 
agitator blades. The mixture should be emulsified by the time 
the tank is full. For applications where it is desirable to use 
more oil in relation to the amount of GNB—A—DDT, use 
earns! Oil Spray 5 which contains only 5% GNB— 
Gesarol Oil Spray Concentrate is a non-emulsible oil base 
product containing 20% GNB—A—DDT and a light summer 
oil to be used with tank mix spreaders, or for dilution with 
any petroleum fraction to form vapo-sprays or oil base sprays 
for airplane applications. 
Gesarol Emulsion Contains 20% GNB—A—DDT as a clear 
solution and on dilution with water forms a very stable emul- 
sion. This product is adaptable to a variety of uses, i.e., where 
stability and good wetting are desired. It can be used as an 
emulsion-type barn and livestock spray and in livestock dip- 
ping vats. For certain applications to plants this product will 
have some advantages over the previously discussed emulsible 
sprays due to its stability, wetting and penetrating properties. 
HOUSEHOLD AND LIVESTOCK SPRAYS AND DUSTS 
Neocid Al0 Powder is effective against roaches, lice, bed- 
bugs, fleas, silverfish, ticks, etc. 
Neocid Barn Spray 40 is a wettable powder containing 40% 
GNB—A—DDT and is recommended as a residual type of fly 
spray in barns at a dosage of 5 lbs. per 100 gals. of water. For 
the control of horn flies on cattle and horses use at the rate of 
20 lbs. per 100 gallons of water. It is effective as a dip against 
sheep ticks, cattle lice and goat lice at 114 lbs. per 100 gallons. 
Neocid Spray Deodorized contains 5% GNB—A—DDT in 
a deodorized kerosene base. It is highly effective against bed- 
bugs, ticks, fleas in houses, carpet beetles, clothes moths and 
particularly against flies and mosquitoes as a residual spray 
applied to walls, screens, etc. Use a sprayer such as a paint 
spray compressor which throws a liquid spray and not a fog, 
or apply to screens with a paint brush. 
Neocid Cattle Spray contains 5% GNB—A—DDT in a stand. 
ard cattle spray oil. This product is emulsible so that it can 
be applied either straight or emulsified with water and applied 
to cattle with a power sprayer. It can also be used as a residual 
type barn spray for application to walls and ceilings either 
straight or emulsified. A 1% emulsion may be satisfactory 
as a dip. 
Neocid Larvicide Dust contains 3% GNB—A—DDT in a 
water-resistant powder for use against anopheline and some 
other mosquitoes at 5 lbs. per acre. It is highly effective 
against adult mosquitoes when applied to surrounding vegeta- 
tion and inside resting places. 
Neocid Larvicide Oil is a 5% solution in fuel oil reecommend- 
ed at about | to 2 quarts for the control of anopheline and cer- 
tain other mosquito larvae. 
PRICE SCHEDULES* 
Prices quoted are f.o.b. Plant City 
Isto 1025 50 100 
lb. lbs. lbs. lbs. 
Per lb 
D-1 Gesarol A3 Dust .................. 10 225 a00D 7.05 
D-2 Gesarol A-3—Sulphur Dust .11 2.50 4.00 7.95 
D-3 Gesarol A5 Dust .................. 14 3.20 5.39. 10:70 
D-4 Neocid Al0 Powder ............ 2B 5.45 9.90 19.75 
D-5 Neocid Barn Spray 40 ........ 0° , 18.00 =35.008 7000 
D-6 Gesarol A20 Spray ...............- 64. ~15.85° 30.65 61-25 
D-7 Gesarol AK 40 Spray ............ 88! 21.65. 42.25 3984.50 
D-8 Neocid Spray-Deodorized .... Prices to be established. 
D-9 Neocid Cattle Spray ............ 50 pti ..80 ‘qt. 22.507eal: 
Gesarol Emulsion ................ Prices to be established. 
be Prices quoted are tentative and subject to change without 
notice. 

ANNOUNCEMENT 
The reaction of the general public to the performance of DDT 
as an insecticide since its release by W.P.B., has undergone 
some interesting changes. Right at the moment, DDT is being 
praised by some, and criticised by others. To clear up some of 
the existing confusion and mysteries surrounding DDT, The 
Kilgore Seed Company is publishing a booklet entitled: 
“TD D |? 
Facts and Fiction 
Be sure to write for a free copy immediately. It will aid you 
in solving your own individual DDT problems. 

50 THE KILGORE SEED COMPANY, Florida’s Leading Seedsmen 
