Use: Because of their safety, pyrethrum extracts are used extensively in stock sprays, aerosols, industrial sanitation sprays, and to protect stored food in warehouses. These pyrethrins may be extracted in kerosene, alcohol, acetone, or ethylene dichloride for formulation in dusts and sprays. They are incompatible with lime and ordinary soaps because acids and alkalies speed up the processes of hydrolysis. Control of chewing and sucking insects and spider mites on fruit, vegetables, field crops, ornamentals and glasshouse crops.
Properties: Botanical insecticide whose active principles are pyrethrins I and II (esters of pyrethrolone and chrysanthemic acid and pyrethroic acid), cinerins I and II (esters of cinerolone and chrysanthemic and pyrethroic acids), and jasmolin I and II (jasmoline and chrysanthemic and pyrethroic acids), collectively known as the "pyrethrins." The plant Chrysanthemum cinerariaefolium, and the flowers are the source of the principles. The flowers and extracts are principally imported from Kenya, Rwanda, Tanzania, and Ecuador. Pyrethrum dried flowers contain 0.9-1.3% pyrethrins. The crude extract or oleoresin contains 50-60% pyrethrins and most refined grade (pale) about 50% (20% in U.S.) pyrethrins by dewaxing and decoloring. Formerly the dried flowers were known as Dalmatian insect flowers; the powdered flowers as "insect powder.".
Mode of Action / Resistance Management
Chemical Group: Pyrethrin
Mode of Action: Sodium channel modulator
Action Group: IRAC Group 3
Hazards: Fish: Toxic. Bee: Toxic (EC). Nontoxic (sprays-repellent effect)
Water Solubility: Soluble
Signal Word: CAUTION
Toxicity Class: III
Toxicity: (Rat): Oral LD50 1500 mg/kg. Dermal LD50 >1800 mg/kg.
Handling/storage: Avoid contact with skin. Keep out of any body of water. Do not contaminate water by cleaning of equipment or disposal of waste. Do not reuse empty container. Destroy by perforating or crushing. Bury or discard in a safe place away from water supplies
Suppliers and Branded Products
Formulators' Trade Names:
- Azera* — MGK
+ Chlorpropham+ Piperonyl Butoxide
- Neo-Stop Plus* — Agriphar S.A.
+ Extract of Tea Tree Oil
- Mytimor* — Stockton Agrimor AG
+ Extract of Tea Tree Oil+ Matrine+ Oxymatrin
- Timor C* — Stockton Agrimor AG
+ Piperonyl Butoxide
- Pyrellin* — Webb Wright Corp.
Prozap* Formula 66