نتایج جستجو برای: anacyclus pyrethrum
تعداد نتایج: 308 فیلتر نتایج به سال:
Dalmatian pyrethrum Tanacetum cinerariifolium (Trevir.) Sch. Bip. (Asteraceae) is a perennial herb endemic to the eastern coast of Adriatic Sea. The species widely cultivated in many countries for its bioactive compounds pyrethrins, which are used as natural insecticides. Plants derived from seeds vary greatly pyrethrin content; therefore, vegetative propagation high-quality individuals very im...
Control of the poultry red mite Dermanyssus gallinae is a challenge for organic as well as conventional egg producers. In organic agriculture, control should be attempted by mechanically acting substances (e.g. oils or diatomaceous earth), before acaricides are applied. Diatomaceous earth (DE) without acaricides was at least as effective as DE supplemented with pyrethrum or essential oils and a...
In May 2001 a sample of Culex pipiens pipiens variety molestus Forskål from Marin County, California, collected as larvae and reared to adults, was found to show reduced resmethrin and permethrin knock-down responses in bottle bioassays relative to a standard susceptible Cx. pipiens quinquefasciatus Say colony (CQ1). Larval susceptibility tests, using CQ1 as standard susceptible, indicated that...
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