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Pyrethrum

Pyrethrum is the powdered, dried flower head of the pyrethrum is daisy, Chrysanthemum cinerariaefolium (Asteraceae). Most of the world’s pyrethrum crop is grown in Kenya. The term “pyrethrum” is the name for the crude flower dust itself, and the term “pyrethrins” refers to the six related insecticidal compounds that occur naturally in the crude material, the pyrethrum flowers. The flowers are ground to a powder and then extracted. (Botanical Pesticides and Their Mode of Action Nabil E. El-Wakeil)

 

PyGanic® is OMRI® & NOP compliant, other pyrethrum containing products are not.

MGK is the only pyrethrum supplier in the U.S. that refines its own pyrethrum. Since we have total control over the processes used in refining, we engineered new ways to produce pyrethrum so it meets the organic standards. Another reason is that most pyrethrum-containing products include the ingredient Piperonyl Butoxide (PBO). Piperonyl Butoxide is a synthetic material that is not allowed in organic production.

    Target Pests: Spider Mites, Russet Mites, Broad Mites, Aphids, Thrips, Whiteflies, Fungus Gnats, Caterpillars, Armyworms, Leafhoppers.

    Mode of Action: Pyrethrins induce a toxic effect in insects when they penetrate the cuticle and reach the nervous system. Pyrethrins bind to sodium channels that occur along the length of nerve cells. Sodium channels are responsible for nerve signal transmission along the length of the nerve cell by permitting the flux of sodium ions. When pyrethrins bind to sodium channels, normal function of the channels is obstructed thereby resulting in hyperexcitation of the nerve cell and, consequently, a loss of function of the nerve cell. The shutdown of the insect nervous system and death are most often the consequences of insect exposure to pyrethrins.

    Application Tips: Pyrethrins rapidly break down after application. They must be applied when target pests are present. Pyrethrins are fast acting and cause rapid knockdown of flying insects or temporary paralysis of other insects. Insects may recover from application of pyrethrins alone and to be most effective, they need to be combined with formulations that include insecticidal soap or other insecticides. (UCDAVIS)

    PyGanic is frequently used in combination with other crop protection products such asBacillus Thuriengensis, Azadiractin, Spinosad, Neem Oil, and a host of other additives, fungicides, nutrients, surfactants and penetrants. PyGanic provides benefits such as quick knockdown and kill of insects, broader spectrum of control, and resistance management benefits to these types of products.
    Be sure to follow the label directions for all products to be applied, including PyGanic. We recommend that you conduct a compatibility test, incorporating the products in the proper proportions to ensure the physical compatibility of the mixture. (http://www.everwoodfarm.com/pdf/FAQ%20PyGanic.pdf)

      Impact on Natural Enemies

      • Overall toxicity rating: Moderate
      • Specific impacts: predatory mites (No information), parasitoids (Moderate), general predators (Moderate)

      Selected References

      UC STATEWIDE IPM PROGRAM