Physical & chemical properties:
Rotenone comes from derris root extract by crystallization?￡Pure rotenone is colorless, hexagonal crystals, with a melting point of 163°C. It is insoluble in water, slightly soluble in mineral oil and carbon tetrachloride, readily soluble in polar organic solvent, particularly in chloroform. It racemizes in basic solution. It is vulnerable to oxidation which leads to decrease of potency, especially under light or basic condition. It is practically stable under dry condition.
Acute oral LD50 for rat 1500mg/kg, highly toxic to fish and silkworm, low toxic to bees, domestic animals and human. Rotenone possesses medium toxicity according to China's agrochemical toxicity classification standard.
Rotenone is a long-used botanical insecticide, a direct contact and stomach action poison. It has good selectivity and low systemic absorption. It kills the pests through inhibition of cell respiratory enzyme. It is degradable under light and air, free of residue contamination. For control of aphid in vegetables, the safety interval is three days.
Formulation: ≥85% Rotenone Emulsion
Properties & Use:
Light brown liquid, may precipitates at low temperature and decompose at above 80° C.
The formulation is most desirable for vegetables, to control aphid, diamond-back moth, flea-beetle, etc. Rate of use is generally 1500ml for one hectare, diluted by water and applied as spray.