Use of UV-inhibiting adjuvants may allow for a longer period of control. Pyrethrum is rapidly broken down by sunlight. Application tips:Ĭare should be taken not to mix pyrethrum with lime, sulphur, or soap solutions, since pyrethrum is broken down by both acid and alkaline conditions. Liquid formulations typically contain 0.1-6% pyrethrum and up to 60% PBO (not permitted in organic culture) dusts contain 0.2-0.4% pyrethrum. Currently, none of these mixtures is approved for organic-farming. However, mixing insecticides against a specific target insect is not recommended because it will promote the development of resistance. Pyrethrum is sometimes available blended with rotenone to increase the range of pests controlled (i.e. Products containing PBO are not approved for organic production. PBO gives pyrethrum an added "kick" that makes it more effective against insects. You will often find pyrethrum mixed with a synergist such as piperonyl butoxide (PBO).
The content of the active substances increases with altitude and cooler average temperatures. On richer soils the insecticidal properties are reduced. Pyrethrum is most productive at altitudes of above 1600 metres and ideally in semi-arid conditions where the winter is cool.
Preventive, cultural, mechanical and physical methods must be first choice for pest control, and conditions for use of a biological or botanical material must be documented in the organic system plan. Since it is considered non- synthetic, pyrethrum is allowed in some countries for organic home gardens. Because it decomposes rapidly in the environment, pyrethrum has been approved for a wide range of indoor and outdoor uses, including homes, restaurants, broad-scale spraying operations, and organic farms. Pyrethrum has been used for centuries as an insecticide and as a lice remedy. The flowers possess insecticidal properties. They are perennial plants with a daisy-like appearance and white flowers. marshalli flowers (members of the daisy or aster family). Pyrethrum is a natural insecticide derived from 100% African Chrysanthemum cinerariaefolium flowers, but also in C. General Information on Pyrethrum, Pyrethrins and Pyrethroids Pyrethrum and Pyrethrins
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