Effectiveness of IGRS (CGA-184699) and (CGA-259205) on the respiratory metabolism of the red palm weevil, Rhynchophorus ferrugineus (Coleoptera: Curculionidae).
Prepupae of Rhynchophorus ferrugineus were topically applied with one of three dose-levels (1.00, 0.10 or 0.01 microgram/insect) of lufenuron (CGA-184699) or diofenolan (CGA-259205). The daily O2 consumption and CO2-output were determined and the respiratory quotient (RQ) was calculated. Lufenuron prohibited the pupae to consume O2, regardless of their age. Considering the CO2 release, this IGR exerted an inhibitory action on pupae increasingly correlated with the increasing dose-level. Volumes of consumed O2 reversely correlated with the dose value of diofenolan. Also, CO2 output was suffered an inhibitory effect of diofenolan which was consecutively related to the dose value. An U-shaped pattern of daily respiration was not, unfortunately, attained, irrespective of the IGR or its dose. In addition, RQ mean values were less than unity but exceeded 0.7.
Ghoneim
K S
KS
Faculty of Science, Al-Azhar University, Madinet Nasr, Cairo, Egypt.
Bream
A S
AS
Tanani
M A
MA
Nassar
M M
MM
D000367:Age Factors; D000818:Animals; D001549:Benzamides / Q000494:pharmacology*; D002245:Carbon Dioxide / Q000378:metabolism; D001517:Coleoptera / Q000187:drug effects* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D007306:Insecticides / Q000494:pharmacology*; D010101:Oxygen Consumption / Q000187:drug effects; D010671:Phenylurea Compounds / Q000494:pharmacology*; D011679:Pupa / Q000187:drug effects / Q000378:metabolism; D012119:Respiration / Q000187:drug effects*; D005466:Fluorocarbons
D001549:Benzamides; D002245:Carbon Dioxide; D007306:Insecticides; D010671:Phenylurea Compounds; C070364:fluphenacur; D005466:Fluorocarbons; C471807:diofenolan