On nous "tympanise" avec des solutions alternatives. Mais en première lecture leur efficacité serait surtout curative ce qui justifierait d’ailleurs l’investissement important sur des palmiers en danger de mort. Mais en préventif c’est tout le contraire l’endothérapie avec émamectine benzoate rémanence huit mois reste la solution idéale .
Source "scoop it"
This study has been conducted through a project for biological control of the red palm weevil (R. ferrugineus ; RPW) in Arab Gulf Countries sponsored by the Arab Organization for Agricultural Development. Steinernema carpocapsae and/or Beauveria bassiana were applied in the soil around the trunks of date palm trees. Successive soil samples were tested for the persistence of nematodes and fungi and their role in controlling the adults of the red palm weevil. S. carpocapsae caused 100% mortality in RPW adults at the first day however, the mortality gradually decreased to 6.7% after 16 days. The nematodes survived in the field for longer than that but in lower population density as detected by the larvae of Galleria mellonella. B. bassiana caused 66.7% mortality on the first day then the mortality decreased to 11.1% after 4 days. The fungus was detected in the field after that with the larvae of G. mellonella. The mixture of the nematode and the fungus caused 100% mortality on the first day then the mortality decreased gradually to 22.2% after 8 days. The results support the possibility of using the nematode and the fungus in the management programmes of RPW.