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Persistance Of Steinernema Carpocapsae (Nematoda: Steinernematidae) And Beauveria Bassiana. (Deuteromycotina: Hyphomycetes) In Soil Around Date Palm Trunks And Their Effect On Adults Of Rhynchophorus Ferrugineus
- M.M.E. Saleh1, G. Hegazy2, M. Salem2, S.B. Hanounik3, O. Al Mohanna4 and M.A.Alheji4
- 1 Department of Pests and Plant Protection, National Research Center, Dokki, Cairo, Egypt.
- 2 Department of Plant Protection, Faculty of Agriculture, Ain Shams University, Shubra Al Khaima, Cairo, Egypt.
- 3 Project of Biocontrol of the red palm weevil, P.O. Box 60, Ras Al Khaima, United Arab Emirates.
- 4 Project of Biocontrol of the red palm weevil, P.O. Box 134, Sihat, 31972, Eastern region, Saudi Arabia
Abstract
This work was conducted through the project for biological control of the red palm weevil, Rhynchophorus ferrugineus (RPW) in Arab Gulf Countries, sponsored by Arab Organization for Agricultural Development. Steinernema carpocapsae and/or Beauveria bassiana were applied in soil around trunks of date palm trees. Successive soil samples were tested for persistence of nematodes and fungi and their role in controlling the adults of RPW. S. carpocapsae caused 100% mortality in RPW adults at the first day however, mortality gradually decreased to reach 6.7% after 16 days. The nematodes survived in the field longer than that but in lower population density, as detected by larvae of Galleria mellonella. B. bassiana caused 66.7% mortality at the first day, then mortality decreased to reach 11.1% after 4 days. The fungus was detected in the field after that using larvae of G. mellonella. The mixture of the nematode and the fungus caused 100% mortality in the first day then mortality decreased gradually to reach 11.1% after 8 days. Results support the possibility of using the nematode and the fungus in pest management programs of RPW.
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