The potential of pomegranate peel and heartwood extracts as a source of new bioacaricides to control the carmine spider mite <i>Tetranychus cinnabarinus</i>
2010
<p>Extracts of seven pomegranate (<i>Punica granatum</i> L.) accessions were evaluated for their potential as sources of bioactive ingredients with significant acaricidal activity, which could lead to the development of new and safe bioacaricides. The crude extracts (96% ethanol) of this plant were tested for their acaricidal activity against the carmine spider mite, <i>Tetranychus cinnabarinus</i> Boisduval, under controlled conditions. Mortality, repellency, and the number of eggs laid were determined. Extracts from the peel of five pomegranate accessions (C13, P.G.130-31, 7/34, P.G.132-33, and P.G.119-20) caused more than 63% repellency. The other two accessions, P.G.106-7 and P.G.127-28, caused 40% and 50% repellency, respectively, compared with the untreated control. All extracts significantly reduced the number of eggs laid (99%), compared with the controls. Four extracts of four pomegranate accessions (heartwood mixed with a very small ratio of leaves) caused significant repellency and significant reduction in the number of the eggs laid.</p><p>Our results show that pomegranate extracts have a good potential as acaricidal agents and that pomegranate accessions differ in their acaricidal activity.
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