Soler A., Gaude J. M., Marie-Alphonsine P. A., Vinatier F., Dole B., Govindin J. C., Fournier P., Quénéhervé Patrick. (2011). Development and evaluation of a new method for sampling and monitoring the symphylid population in pineapple. Pest Management Science, 67 (9), p. 1169-1177. ISSN 1526-498X.
Titre du document
Development and evaluation of a new method for sampling and monitoring the symphylid population in pineapple
Soler A., Gaude J. M., Marie-Alphonsine P. A., Vinatier F., Dole B., Govindin J. C., Fournier P., Quénéhervé Patrick
Source
Pest Management Science, 2011,
67 (9), p. 1169-1177 ISSN 1526-498X
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.
