Mimeo E-51
January 1970
Purdue University
Cooperative Extension Service
Department of Entomology

Dilution and Conversion Table
These are approximate proportions for mixing sprays for farm and home use and are not intended for formulating insecticides for resale. To obtain the following percentages
of chemical in the spray mixture, use the amount of formulation indicated in 100 gallons of water. Figures in ( ) indicate the amount to use in one gallon.

Amount of formulation to use when desired percent of chemicals in mixture is --
Formulation	.03125%	.0625%	0.125%	0.25%	0.5%	1.0%	2.0%
10%-12% E. C. containing 1 lb. chemical per gal.	2 pt (2 tsp)	4 pt (4 tsp)	1 gal (8 tsp)	2 gal (16 tsp)	4 gal (10 tbsp)	8 gal (2/3 pt)	16 gal (1 1/3 pt)
15%-20% E. C. containing 1 1/2 lb. chemical per gal.	1 1/2 pt (1 1/2 tsp)	3 pt (3 tsp)	6 pt (6 tsp)	1 1/2 gal (12 tsp)	3 gal (7 1/2 tbsp)	6 gal (1/2 pt)	12 gal (1 pt)
25% E. C. containing 2 lb. chemical per gal.	1 pt (1 tsp)	2 pt (2 tsp)	4 pt (4 tsp)	1 gal (8 tsp)	2 gal (5 tbsp)	4 gal (10 tbsp)	8 gal (2/3 pt)
33%-35% E. C. containing 3 lb. chemical per gal.	3/4 pt (3/4 tsp)	1 1/2 pt (1 1/2 tsp)	3 pt (3 tsp)	6 pt (6 tsp)	1 1/2 gal (4 tbsp)	3 gal (8 tbsp)	6 gal (1/2 pt)
40%-50% E. C. containing 4 lb. chemical per gal.	1/2 pt (1/2 tsp)	1 pt (1 tsp)	2 pt (2 tsp)	4 pt (4 tsp)	1 gal (8 tsp)	2 gal (5 tbsp)	4 gal (10 tbsp)
57% E. C. containing 5 lb. chemical per gal.	7/16 pt (7/16 tsp)	7/8 pt (7/8 tsp)	1 3/4 pt (1 3/4 tsp)	3 1/2 pt (3 1/2 tsp)	7 pt (7 tsp)	1 3/4 gal (4 1/2 tbsp)	3 1/2 gal (9 tbsp)
60%-65% E. C. containing 6 lb. chemical per gal.	3/8 pt (3/8 tsp)	3/4 pt (3/4 tsp)	1 1/2 pt (1/2 tbsp)	3 pt (1 tbsp)	6 pt (2 tbsp)	1 1/2 gal (4 tbsp)	3 gal (8 tbsp)
70%-75% E. C. containing 8 lb. chemical per gal.	1/4 pt (1/4 tsp)	1/2 pt (1/2 tsp)	1 pt (1 tsp)	2 pt (2 tsp)	4 pt (4 tsp)	1 gal (8 tsp)	2 gal (5 tbsp)
15% wettable powder	1 2/3 lb (2 1/2 tsp)	3 1/3 lb (5 tsp)	6 2/3 lb (10 tsp)	13 1/3 lb (7 tbsp)	26 2/3 lb (1 cup)	53 1/3 lb (2 cups)	106 2/3 lb (4 cups)
25% wettable powder	1 lb (1 1/2 tsp)	2 lb (3 tsp)	4 lb (6 tsp)	8 lb (12 tsp)	16 lb (8 tbsp)	32 lb (1 cup)	64 lb (2 cups)
40% wettable powder	5/8 lb (1 tsp)	1 1/4 lb (2 tsp)	2 1/2 lb (4 tsp)	5 lb (8 tsp)	10 lb (5 tbsp)	20 lb (10 tbsp)	40 lb (1 1/4 cups)
50% wettable powder	1/2 lb (3/4 tsp)	1 lb (1 1/2 tsp)	2 lb (3 tsp)	4 lb (6 tsp)	8 lb (4 tbsp)	16 lb (8 tbsp)	32 lb (1 cup)
75% wettable powder	1/3 lb (1/2 tsp)	2/3 lb (1 tsp)	1 1/3 lb (2 tsp)	2 2/3 lb (4 tsp)	5 1/3 lb (8 tsp)	10 2/3 lb (5 tbsp)	21 1/3 lb (10 tbsp)