Desiccation intolerance of the red palm weevil, Rhynchophorus ferrugineus (oliv) adults in relation to their cuticular hydrocarbons

The desiccation tolerance of red palm weevil (RPW), Rhynchophorus ferrugineus was investigated in the laboratory. Adults exposed to 35 or 75% relative humidity showed high rate of water loss. Water loss rate averaged 2.32 ± 0.35 and 6.71 ± 0.73 mg /g fresh body weight/hr at 35 or 75% RH, respectively, and cumulative loss increased with time. Adults exposed to 35% RH died within a maximum of 4 days. Cuticular hydrocarbons (CHCs) were isolated and identified from adults to elucidate the physiological basis of their intolerance to desiccation. They were dominated by saturated n-alkanes (75%), while the ester compound 1-henicosyl formate, the fatty alcohol 3-(E) eicosanol and the alkene tricosene represented 25% of total surface CHCs. The desecration intolerance of weevils was attributed to the presence of relatively high proportion of 1-henicosyl formate (17.5%) which could form large pores within the waxy waterproofed CHCs layer of weevils.

• Publication year

  2009

• Venue

  Egyptian Academic Journal of Biological Sciences

• Publication date

  2009-06-01

• Fields of study

  Biology, Environmental Science

• Identifiers
  DOI 10.21608/EAJBSA.2009.15452
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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