INSECTICIDES AND FUNGICIDES 295

TABLE XXVL—INCOMPATIBILITY OF INSECTICIDES AND FUNGICIDES

Spray compounds .
Objectionable combination with:
Questionable combination with:

Stomach Poisons

Acid lead arsenate .
Alkali sulphide Soaps Soap-oil emulsion
Lime-sulphur

Basic lead arsenate

Alkali sulphides

Paris green
Lime-sulphur Alkali sulphides Soaps Soap-oil emulsion Cyanide fumigation
Tobacco infusion

Zinc arsenite
Lime-sulphur Alkali sulphides Soaps Soap-oil emulsion
Bordeaux mixture Cyanide fumigation Tobacco infusion

Tracheal Poisons

Tracheal Poisons and Fungicides

Fungicides

Tobacco infusion
Bordeaux mixture
Paris green Zinc arsenite

Cyanide fumigation
Zinc arsenite Paris green Bordeaux mixture

Soap-oil emulsion
Zinc arsenite Paris green Acid lead arsenate Lime-sulphur
Bordeaux mixture

Soaps
Zinc arsenite Paris green Acid lead arsenate
Lime-sulphur Bordeaux mixture

Alkali sulphides
Zinc arsenite Paris green Acid lead arsenite
Bordeaux mixture Basic lead arsenate

Sulphur

Lime-sulphur solution
Soap-oil emulsion Zinc arsenate Paris green
Bordeaux mixture Acid lead arsenate Soaps

Bordeaux mixture
Cyanide fumigation Tobacco infusion
Lime sulphur Alkali sulphides Soaps Soap-oil emulsion Zinc arsenate

;1

n

1% :

Other combinations of these sprays are thought to be safe.