Study mission in Papua New Guinea to improve the control of coconut pests by mass selective trapping (from 30/01 to 20/02/2000) : EU-INCO project N° IC18CT970199

Morin Jean-Paul. 2000. Study mission in Papua New Guinea to improve the control of coconut pests by mass selective trapping (from 30/01 to 20/02/2000) : EU-INCO project N° IC18CT970199. Montpellier : CIRAD-CP, 24 p. N° de rapport : CP_SIC 1255 BIS

Autre titre : Mission d'étude en Papouasie Nouvelle-Guinée pour l'amélioration du contrôle des ravageurs du cocotier par piégeage sélectif de masse (du 30/01 au 20/02/2000)

Résumé : Intensive trapping of Scapanes australis carried out by CCRI since April 1998 has led to a decline in populations. In order to check that pest control and the protection of young coconut palms is effective, which would make it possible to resume coconut planting with high-yielding material (hybrids), it was agreed that areas of land would be prepared for intensive trapping 6 months prior to planting. Hybrid seedlings are being prepared in the nursery and will be planted in December 2000. Trapping will mostly be carried out along the borders. Insect captures, and collection from plants in the plots, with or without trapping, and damage records will be used to assess the efficacy of this control method. Insect collection will prevent exaggerated exposure of the coconut palms in plots without traps. All these trials will be set up shortly. It is still too early to calculate the cost price of this control method. A provisional assessment leads to an average monthly cost per trap of 3.2 Kinas (US$ 1.6), (monthly amortization of trap plus pheromone). The trials planned over the coming months will enable us to determine the number of traps/ha, hence the cost/ha for the protection of young coconut plantings. CCRI staff will take care of monitoring the condition of the plantings and the decline in pest populations in accordance with the protocols that have been drawn up. Insect captures, and collection from plants, along with damage records, will be used to assess the efficacy of this control method. It is therefore important for CCRI to have the necessary resources, particularly for travel to and around the trials. Whilst carrying out trapping with the means currently available (pheromone and plant matter), trials will be continued to try and find a completely synthetic attractant for use in new large-capacity traps that are currently being studied at CCRI. The aim is to carry out trapping whilst reducing the constraints of weekly visits to renew the plant matter and collect the insects. During this mission, trials were carried out with synthetic synergists to trap the weevil Rhynchophorus bilineatus. The results obtained with the initial mixtures tested were not encouraging, apart from an ethyl acetate/ethanol mixture, which needs to be tested again in a plot at a time when the weevils are more numerous. Other mixtures that were brought, but not tested at the time, will also be tested.

Mots-clés Agrovoc : Cocos nucifera, Scarabaeidae, lutte anti-insecte, piégeage des animaux, attractif, analogue phéromone, composé volatil, Rhynchophorus, expérimentation au champ

Mots-clés géographiques Agrovoc : Papouasie-Nouvelle-Guinée

Mots-clés complémentaires : Scapanes australis, Rhynchophorus bilineatus

Classification Agris : H10 - Ravageurs des plantes

Auteurs et affiliations

• Morin Jean-Paul, CIRAD-CP-COCOTIER (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/264385/)

Métriques

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