Experimental and Applied Acarology (2010) 50, 317-328

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Raquel Abad-Moyano, Tatiana Pina, Jordi Pérez-Panadés, Emilio A. Carbonell and Alberto Urbaneja (2010)
Efficacy of Neoseiulus californicus and Phytoseiulus persimilis in suppression of Tetranychus urticae in young clementine plants
Experimental and Applied Acarology 50 (4), 317-328
Abstract: Tetranychus urticae is one of the most damaging tetranychid mites affecting clementine orchards in Spain, where natural control is insufficient. Furthermore, in clementine nurseries, tender foliage is highly susceptible to attack and natural enemies are almost always absent. Therefore, acaricides are often used indiscriminately. Alternative control measures are necessary, both in commercial orchards and clementine nurseries. In order to assess the efficacy of inoculative releases of N. californicus and P. persimilis to reduce T. urticae populations in young Spanish clementine plants, a semi-field experiment was conducted and repeated in three seasons (spring, summer and autumn). Phytoseiulus persimilis was highly effective in reducing both T. urticae infestations and the damage level inflicted on plants at both release rates evaluated (40 and 80 phytoseiids/plant) and all three periods considered. By contrast, N. californicus demonstrated low performance under certain conditions. The results of this study could be adapted and transferred to nurseries and young citrus plantations.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Tatiana Pina, Alberto Urbaneja

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
inundative/inoculative release

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Tetranychus urticae Citrus (genus) Spain (continental)
Phytoseiulus persimilis (predator) Tetranychus urticae Citrus (genus) Spain (continental)
Neoseiulus californicus (predator) Tetranychus urticae Citrus (genus) Spain (continental)
Euseius stipulatus (predator) Tetranychus urticae Citrus (genus) Spain (continental)