Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier)
S. Shawir, M., Abdel-latif Abbassy, M., Mohamed Salem, Y. (2014). Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier). EKB Journal Management System, 35(April-June), 75-79. doi: 10.21608/asejaiqjsae.2014.2579
Mohamed S. Shawir; Moustafa Abdel-latif Abbassy; Yehia Mohamed Salem. "Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier)". EKB Journal Management System, 35, April-June, 2014, 75-79. doi: 10.21608/asejaiqjsae.2014.2579
S. Shawir, M., Abdel-latif Abbassy, M., Mohamed Salem, Y. (2014). 'Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier)', EKB Journal Management System, 35(April-June), pp. 75-79. doi: 10.21608/asejaiqjsae.2014.2579
S. Shawir, M., Abdel-latif Abbassy, M., Mohamed Salem, Y. Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier). EKB Journal Management System, 2014; 35(April-June): 75-79. doi: 10.21608/asejaiqjsae.2014.2579

Laboratory Evaluation of some Insecticides against Larval and Adult Stages of Red Palm Weevil’s Rhynchophorus ferrugineus (Olivier)

Alexandria Science Exchange Journal
Article 2, Volume 35, April-June - Serial Number 2, April 2014, Page 75-79  XML PDF (138.37 K)
Document Type: Original Article
DOI: 10.21608/asejaiqjsae.2014.2579
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Authors
Mohamed S. Shawir1; Moustafa Abdel-latif Abbassy2; Yehia Mohamed Salem2
1Department of Pesticide Chemistry and Toxicology, faculty of Agricultural, Alexandria University, Egypt.
2Department of Plant Protection, faculty of Agriculture, Damanhour University
Abstract
The toxicity of eight compounds belong to different groups of  insecticides; chlorpyrifos-ethyl and dimethoate (organophosphate); methomyl (carbamate); imidacloprid (neonicotinoid); emamectin benzoate (avermectin); azadirachtin (tetranortriterpenoid), deltamethrin                       (pyrethroid) and fipronil (phenylpyrazole). was evaluated in the laboratory against larvae and adults  of the red palm weevil, Rhynchophorus  ferrugineus (Olivier), by using dipping food technique. The results showed that imidacloprid was the most toxic insecticide among the tested compounds against the larvae, followed by emamectin benzoate, deltamethrin and fipronil, whereas the LC50s were 63.6, 136.6, 290.2 and 773.78 ppm, respectively. The organophosphate insecticides, chlorpyrifos-ethyl and dimethoate were the less toxic compounds (LC50s were 2597 and 8466 ppm), against larvae. However, deltamethrin was the most toxic insecticids against the adult followed by emamectin benzoate  and imidacloprid, whereas the LC50s were 129.8, 136.6 and 287.3 ppm, respectively. The organophosphate insecticides, chlorpyrifos-ethyl and dimethoate, were still the less active compounds (LC50s were 790.4 and 11085 ppm) against the adults of R ferrugineus. The results revealed that the adults were more sensitive to most of the tested insecticides compared with larvae except for imidacloprid and dimethoate.  Moreover, by increasing time of exposure the toxicity of imidacloprid to both larvae and adults increased.
 
Keywords
Red palm weevil; Relative Toxicity; Insecticides; date palm
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