Rotenone bases

Botanicals Plant extracts without petroleum-based synergists (pyrethrum, rotenone, nicotine, neem, horsetail) Rare Rare... 

BPR [FMC], TM for insecticidal mixture containing varying proportions of pyrethrin, pipero-nyl butoxide, and rotenone in liquid or dust base. 

Based on these results, we tested the efficacy of aqueous emulsions and direct aqueous extracts against diamondback moth larvae on cabbage plants in a greenhouse trial. Aqueous emulsions of seed extract as low as 0.5% concentration produced >80% lar al mortality, and were superior to the use of 1% rotenone dust, a commercial botanical insecticide. An aqueous extract at 7,5% concentration produced >90% larval mortality, comparable to that obtained with 0.1% pyrethrum,... 

Because rotenone does not block mitochondrial ATP site II (site of entry of cytoplasmic NADH) these data infer that the nitrite rather than nitrate reduction is affected. Nitrite accumulated in excised leaves (gaseous milieu) under nitrogen is rapidly lost upon transfer to air (Jones and Sheard, 1978). When only the base of excised leaves are placed in a small amount of water or water containing DNF or FCCP (carbonyl-chlorideptri-fluoromethoxyphenylhydrazone) nitrite accumulation is unaffected by the treatments, under anaerobic conditions. Upon transfer to air, leaves treated with DNP or FCCP show relatively small amounts of loss of nitrite in comparison with controls (Hageman et al., 1980b). 

A new route to isoflavanones has been developed with a view to extending the reaction to the synthesis of natural products having this functionality, notably the rotenones. The reaction of acylanion equivalents with /3-nitrostyrene gave the expected adduct (128), which after acid and base treatment gave the a-methyleneketone (129) in reasonable yield. By judicious choice of the substituent group R, further treatment with acid and base gave the isoflavanone (130) in... 

The method for the determination of rotenone adopted as official by the A,0,A.C. was based on the work of Jones and Graham and that included in the B.Vet.C. 1953 is a modification of the A.O.A.C, method proposed by Coomber, Martin and Harper. These methods were in general use for some time, but widely divergent results were obtained in different laboratories. A joint committee of the Pharmaceutical Society and the Society for Analytical Chemistry reviewed available methods and in particular considered the work of Martin which had been overlooked for many years. Martin showed that the phenolic and emulsifying constituents of derris extract could be removed by washing with alkali. When this was done the subsequent crystallisation of rotenone from carbon tetrachloride was found to be much more satisfactory. The panel also examined an alternative... 

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