Active ingredient

Copper hydroxide

Chemical name

copper hydroxide (Cu(OH)₂) 

Classification

Fungicide / Agrochemical

Formulation

77% WP 57.6% WDG, 37.5% SC

Biochemistry

Non-specific thiol reactant, inhibiting respiration. Copper-II-ion (Cu++) is taken up by the spores during germination and accumulates until a sufficiently high concentration is achieved to kill the spore cell; the activity is limited to the prevention of spore germination.

 Mode of action

Protectant fungicide and bactericide. Deposits must be on the crop before fungal spores begin to germinate.

Usage

For control of Peronosporaceae in vines, hops, and brassicas; Alternaria and Phytophthora in potatoes; Septoria in celery; and Septoria, Leptosphaeria, and Mycosphaerella in cereals, at 2-4 kg/ha or 300-400 g/100 l.

Mammalian Toxicology

Oral: Acute oral LD50 for rats 489 mg/kg (tech.).  

Skin and eye: Acute percutaneous LD50 for rabbits >3160 mg/kg. Severely irritating and corrosive to eyes, mild skin irritant.  

Inhalation: LC50 > 2 mg/l air.

Certificate of quality

Copper hydroxide 77% WP

Item

Appearance

Content of Copper hydroxide

Suspensibility,

Wetting time

Fineness (through 45um test sieve)

Moisture

pH

Specification

Blue powder

≥77%

≥70%

≤60s

≥98%

≤3.0%

6.0-9.0