The threat of red palm weevil &lt;I&gt;Rhynchophorus ferrugineus&lt;/I&gt; to date plantations of the Gulf region in the Middle-East: An economic perspective

El-Sabea, Alaa M. R.; Faleiro, J. R.; Abo-El-Saad, Mahmoud M.

doi:10.1564/20jun11

Cited by 92 publications

(68 citation statements)

References 3 publications

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“…The red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae), is a serious threat to plantations of Phoenix dactylifera (El-Sabea et al 2009), Cocos nucifera (Siriwardena et al 2010), and Phoenix canariensis (Dembilio et al 2010a). Infestation of the weevil has been reported in more than 29 palm species, and have caused considerable economic losses worldwide .…”

Section: Introductionmentioning

confidence: 99%

Effect of Beauveria bassiana infection on the feeding performance and antioxidant defence of red palm weevil, Rhynchophorus ferrugineus

et al. 2015

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The entomopathogenic fungal infection of target hosts depends on pathogen fitness and host defence mechanisms. Pathogen-host interactions in red palm weevil, Rhynchophorus ferrugineus larvae are poorly understood. In order to explore this interaction, 4th, 8th, and 12th instar red palm weevil larvae were immersed in conidial suspensions of four isolates of Beauveria bassiana. Significant differences in the virulence of the tested isolates were revealed by LT 50 values. Conidia of B8463, a highly virulent isolate, showed 33.53 % higher relative hydrophobicity and twice as much Pr1 activity than conidia of B8465. Growth indices, calculated after 72 h of incubation, revealed significant differences in the food utilization efficiencies of all studied larval instars infected with different isolates. Conidial infection with B8463 caused 39-45 % reduction in efficacy of consumption of ingested food (ECI) and 55-61 % reduction in digested food (ECD). The least virulent isolate, B8465, caused the smallest reduction in ECI (2-4 %) and ECD (3-9 %). Furthermore, enhanced expression of target antioxidant genes (catalases and peroxidase) was observed in larvae infected with virulent isolates. Similarly, approximate digestibility showed an opposite trend, with the highest values being recorded from samples infected with the most virulent conidia (B8463) at each studied larval instar. In conclusion, isolate B8463 significantly affected the growth and development of red palm weevil larvae and has good potential for use in eco-friendly R. ferrugineus management.

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Section: Introductionmentioning

confidence: 99%

Effect of Beauveria bassiana infection on the feeding performance and antioxidant defence of red palm weevil, Rhynchophorus ferrugineus

et al. 2015

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“…Severe RPW infestations have been reported on Cocos nucifera, Phoenix dactylifera and Phoenix canariensis (Gadelhak and Enan, 2005;El-Mergawy et al, 2011;Hussain et al, 2013a). Recent statistics have shown that RPW infestations may cause severe economic losses that range from 1% to 5% (5.18 to 25.92 million USD), and the indirect losses increase these figures by several folds (El-Sabea et al, 2009). The most destructive stage of R. ferrugineus is the legless, creamy white larval stage (grubs), which chews the tender, soft tissues of the palms and moves toward the interior of the plant.…”

Section: Introductionmentioning

confidence: 99%

Status of Insecticide Resistance in Field-collected Populations of Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae)

Al-Ayedh¹,

Hussain²,

Rizwan-ul-Haq³

et al. 2015

IJAB

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To cite this paper: Al-Ayedh, H., A. Hussain, M. Rizwan-ul-Haq and A.M. Al-Jabr, 2016. Status of insecticide resistance in field-collected populations of Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae AbstractThe first monitoring of the resistance to two organophosphates (methidathion and ethion) and one pyrethroid (cypermethrin) insecticides presented by three field collections of different Rhynchophorus ferrugineus (Olivier) populations was performed in this study. The LD50 doses of three insecticides against newly moulted eighth-instar R. ferrugineus larvae were estimated through toxicity bioassays, in which the larvae were fed on artificial diet supplemented with different individual doses of cypermethrin, methidathion or ethion. A population of R. ferrugineus collected from Wadi Ad-Dawasir was chosen as the reference strain, because of its susceptibility to each of the tested insecticide. Compared with the susceptible strain, populations sampled from Al-Ahsa and Al-Qatif showed 8.72 and 4.51-folds increase in resistance to cypermethrin and 3.77 and 2.85-fold increases in resistance to ethion, respectively. The LD50 values of cypermethrin (1.62 ppm), methidathion (3.15 ppm) and ethion (9.12 ppm) in the susceptible population (Wadi Ad-Dawasir) were used to investigate the feeding performances and physiological impacts on eighth-instar R. ferrugineus larvae. The larvae showed no resistance to the most potent insecticide (methidathion) resulting highest growth reduction. However, moderate resistance was observed from red palm weevil population collected from Al-Qatif and Al-Ahsa against cypermethrin resulting lowest reduction in the efficacy of conversion of ingested food (ECI) and digested food (ECD). In addition, glutathione-S-transferase (GST) activity assay further strengthen our findings. Results suggest that enhanced GST activity likely contributes to cypermethrin and ethion resistance exhibited by the R. ferrugineus populations sampled from Al-Qatif and Al-Ahsa. Toxicity bioassays, dietary utilization experiments and GST assays examined in this study support the use of methidathion against R. ferrugineus as the most potent insecticide against all the sampled populations. However, cypermethrin and ethion resistance appears to be evolving in the R. ferrugineus populations from Al-Qatif and Al-Ahsa, justifying the concern of farmers regarding the low efficacy of insecticides.

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“…Losses in global production of dates have been estimated at 30% due to the plant diseases and pests (FAOstat 2013). The annual loss in the Gulf region of the Middle-East due to eradication of severely infested palms has been estimated to range from US$1.74 to 8.69 million at 1 and 5% infestation, respectively (El-Sabea et al, 2009). …”

Section: Economic Impactmentioning

confidence: 99%

Review on the Management of Red Palm Weevil Rhynchophorus ferrugineus Olivier in Date Palm Phoenix dactylifera L

Al-Dosary

Al-Dobai²,

Faleiro³

2016

Emir. J. Food Agric

106

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The threat of red palm weevil <I>Rhynchophorus ferrugineus</I> to date plantations of the Gulf region in the Middle-East: An economic perspective

Cited by 92 publications

References 3 publications

Effect of Beauveria bassiana infection on the feeding performance and antioxidant defence of red palm weevil, Rhynchophorus ferrugineus

Effect of Beauveria bassiana infection on the feeding performance and antioxidant defence of red palm weevil, Rhynchophorus ferrugineus

Status of Insecticide Resistance in Field-collected Populations of Rhynchophorus ferrugineus (Olivier) (Coleoptera: Curculionidae)

Review on the Management of Red Palm Weevil Rhynchophorus ferrugineus Olivier in Date Palm Phoenix dactylifera L

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