Soler A. auteur aut IRD Gaude J. M. auteur aut IRD Marie-Alphonsine P. A. auteur aut IRD Vinatier F. auteur aut IRD Dole B. auteur aut IRD Govindin J. C. auteur aut IRD Fournier P. auteur aut IRD Quénéhervé Patrick auteur aut IRD text journalArticle eng text/pdf born digital access BACKGROUND: Symphylids (Hanseniella sp.) are polyphagous soilborne parasites. Today, symphylid populations on pineapple are monitored by observing root symptoms and the presence of symphylids at the bottom of basal leaves. The authors developed a reliable method with a bait and trap device to monitor symphylid populations in pineapple or fallow crops. The spatial distribution of the symphylid populations was evaluated using the variance/mean ratios and spatial analyses based on Moran's and Geary's indices. The method has been tested to monitor symphylid populations at different developmental stages of pineapple. RESULTS: Adding potato baits to the soil samples increased the trapping efficiency of symphylids when compared with 'soil only' and 'bait only' methods. The handling of the samples is also facilitated by the new device. Results showed that the vertical distribution of symphylids may be uniform deeply inside the soil profile under pineapple, up to 50 cm. Results showed that symphylid populations are highly aggregated, showing a spot area about 4-6 m wide for their development. CONCLUSION: The new method allows better and easier evaluation of symphylid populations. It may be very useful in the evaluation of new IPM methods to control symphylids under pineapple. specialized symphylids Hanseniella sp. monitoring method pineapple 076 67 9 1169-1177 2011 1526-498X https://www.documentation.ird.fr/hor/fdi:010053781 10.1002/ps.2170 1526-498X [F B010053781] https://www.documentation.ird.fr/hor/fdi:010053781 https://www.documentation.ird.fr/intranet/publi/2011/09/010053781.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-10-06 2017-08-23 fdi:010053781 fre