Merghem, A., Mohamed, A. (2017). Impact of Neem Extracts, Azadirachta indica A. Juss Induced against Red Palm Weevil, Rhynchophorus ferrugineus (Olivier) Attacking Date Palm Orchards in Egypt. Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 9(3), 109-117. doi: 10.21608/eajbsf.2017.17032
Ahmed Merghem; Abd Al-Rahman Mohamed. "Impact of Neem Extracts, Azadirachta indica A. Juss Induced against Red Palm Weevil, Rhynchophorus ferrugineus (Olivier) Attacking Date Palm Orchards in Egypt". Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 9, 3, 2017, 109-117. doi: 10.21608/eajbsf.2017.17032
Merghem, A., Mohamed, A. (2017). 'Impact of Neem Extracts, Azadirachta indica A. Juss Induced against Red Palm Weevil, Rhynchophorus ferrugineus (Olivier) Attacking Date Palm Orchards in Egypt', Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 9(3), pp. 109-117. doi: 10.21608/eajbsf.2017.17032
Merghem, A., Mohamed, A. Impact of Neem Extracts, Azadirachta indica A. Juss Induced against Red Palm Weevil, Rhynchophorus ferrugineus (Olivier) Attacking Date Palm Orchards in Egypt. Egyptian Academic Journal of Biological Sciences, F. Toxicology & Pest Control, 2017; 9(3): 109-117. doi: 10.21608/eajbsf.2017.17032
Impact of Neem Extracts, Azadirachta indica A. Juss Induced against Red Palm Weevil, Rhynchophorus ferrugineus (Olivier) Attacking Date Palm Orchards in Egypt
1Department of Wood borers and Termites, Plant Protection Research Institute
2Central Laboratory for Date Palm Research and Development, Agricultural Research Centre Giza, Egypt.
Abstract
Red palm weevil (RPW), Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae) is considered to be the most devastating boring pest attacking the date palm trees, Phoenix dactylifera L. (Arecales: Arecaceae). During this study the date palm orchards were investigated at Ismailia governorate in Egypt to throughout 2015-2016 and results revealed the wide distribution of RPW with high infestation rates at the visited localities. Rates and degrees of infestation were detected through the attacked spots showing a direct proportional rate with the total planted date palm trees in each location recording a highest infestation rate of 91.6% and a maximum infestation degree was 3.4 hole/ tree. Least average infestation levels were 14.9% and 1.19 hole/ tree. Extracts of neem seeds, Azadirachta indica A. Juss(Sapindales: Meliaceae) were tested in the laboratory against the RPW stages using organic solvents in addition to the commercial Nemazal brand as a comparison treatment. Laboratory experiments revealed a potential effect of the used titers againstboth adult and larval R. ferrugineus stagesresulting in high mortality rates reached 85.4 and 79.5% on average for larval and adult stages, respectively. Consequent field trials with such agents were conducted on both remedial and protective scales revealing a considerable reduction of infestation was 60.8% and 53.1% repellency on average for all applied treatments. Field trials proved the possibility of those treatments usage in the control programs of that borer in Egypt.
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