engleski

Composition and content of pyrethrin in different flower development stages of Dalmatian pyrethrum

Pyrethrin is a globally known insecticidal compound extracted from the dry, ground flower heads of Dalmatian pyrethrum (Tanacetum cinerariifolium (Trevir.) Sch. Bip). It consists of six compounds: pyrethrin I and II, cinerin I and II and jasmolin I and II. The highest pyrethrin content (94% of the total pyrethrin content) in pyrethrum was recorded in the achenes (Kiriamiti, 2003). The pyrethrin content depends among others, on genotype (Grdiša et al., 2014), climate conditions and the flower development stage in which the flowers are harvested (Grdiša et al., 2022). Several flower development stages can be distinguished. At first, the ray petals unfold, followed by the florets opening sequentially from the margins towards the center, with a single row of florets opening daily (Chandler, 1951). To achieve the highest possible pyrethrin yield, harvesting time is determined by the optimal developmental stage of the pyrethrum flowers (Head, 1966). This study was aimed at determining the pyrethrin content in Dalmatian pyrethrum flowers sampled in different flower development stages.

Tanacetum cinerariifolium ; Asteraceae ; pyrethrin ; biochemical composition

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