Insecticide

DDT
DDT Sevin
DDT Sevin
DDT Sevin
 Sevin
Untreated


Pound
Act. Txc./Acre


1
1-1
1- 0.5
1.- 0.25
 1
-------


Percent Budworm Damaged Plants
Mar. 23 Mar. 30 Apr. 6


7
8
7
11
16
27


 In short, DDT was more effective than Sevin
was not increased by the addition of Sevin.


and its effectiveness


Experiment III DDT, Toxaphene, and DDT-Toxaphene Combinations for
Budworm Control. Florigold 107 sweet corn was planted on March 11, 1964.
All plots were treated equally with DDT-Toxaphene sprays on March 16
and 19 for corn stem weevil control. Experimental sprays were applied
twice weekly from March 23 to April 6. Since then, they have been
applied weekly. The application rate has been 100 gallons per acre.
As of April 23, this experiment is still in progress.


Insecticide Formulation

DDT (2 lb/gal) EC
Toxaphene (8 Ib/gal) EC
DDT Toxaphene
DDT Toxaphene
DDT Toxaphene
Untreated


Pints of
Formulation
/100 gals.

4 .
 1.5
4 1.5
4 0.75
2 1.5


Percent Budworm
Damaged Plants
April 15 April 21


4
2
8
20


15
26
 8
 4
S9
29-


 So far there seems to be a definite advantage in using DDT-toxaphene
in combination over using either material alone.


Experiment IV DDT, Parathion, and DDT-Parathion Combinations for Budworm
Control. Planting and application procedures are the same as those in
Experiment III.


Insecticide Formulation

DDT (2 lb/gal) EC
Parathion (4 Ib/gal) EC
DDT Parathion
DDT Parathion
DDT Parathion
Untreated


. Pints of
 .Formulation
 /100 gals.

 4
 0.5
 4 0.5
 4 0.25
 2 0.5
 aain a


Percent Budworm
Damaged Plants
April 15 April 21


 To date DDT-parathion combinations seem considerably more effective
than DDI or parathion alone.