Biological activity of four plant oils, against the red palm weevil, Rhynchophorus ferrugineus (Oliver), (Coleoptera Curculionidae)

Abstract

In the present study, four botanical oils of Melissa officinalis, Borago officinalis, Laurus nobilis and Carapichea ipecacuanha were tested against newly emerged adult males and females of the red palm weevil, Rhynchophorus ferrugineus (Oliver) for investigating their insecticidal activity, their effects on some bilogical aspects and morphogenetic abnormalities in the all stages.The results revealed that the males of Rhynchophorus ferrugineus were more susceptible to the four botanical oils than the females, followed by the immature larvae. The larvae showed different degrees of susceptibility to the four botanical oils, they showed the highest susceptibility to C. ipecacuanha and the lowest to B. officinalis oil at LC 50 levels. Both adult males and females showed the highest susceptibility to C. ipecacuanha and the lowest to L. nobilis oil at LC 50 levels. Also, the obtained results showed that the four tested oils disrupted some biological aspects of the tested insects. These oils markedly reduced male and female longevity, female fecundity and hatchability of the laid eggs. Morphogenetic abnormalities such as darkness of pupae, incomplete adult eclusion , dwarfism and crumpled wings and legs of adults appeared in the different stages of the insect as a result of treatment with the four tested oils. Group Tested plants Family name Used parts Common name Scientific name Group (A) Fixed oils Lemon balm ‫اﻟﺘﺮﻧﺠﺎن‬ Melissa officinalis Lamiaceae Leaf Borage or Star flower ‫اﻟﺤﻤﺤﻢ‬ Borago officinalis Boraginaceae Leaf Group (B)Volatile oils Bay Laurel or Bay leaf ‫اﻟﻐﺎر‬ ‫ﺣﺐ‬ Laurus nobilis Lauraceae Leaf & fruit Rio ipecac ‫اﻟﺬھﺐ‬ ‫ﻋﺮق‬ Carapichea ipecacuanha Rubiaceae Root&leaf

Bio-Insecticide of Thymus vulgaris and Ocimum basilicum Extract from Cell Suspensions and Their Inhibitory Effect against Serine, Cysteine, and Metalloproteinases of the Red Palm Weevil (Rhynchophorus ferrugineus)

“…Numerous biologically active constituents have been isolated from natural resources (including volatile oils, fixed oils, and other plant constituents) that can be used against insect species [ 18 ]. The larvicidal effect may be attributed to the various chemical components that have been isolated, e.g., terpenoids, flavonoids, alkaloids, sterols, and others [ 19 ].…”

Exploring Ocimum basilicum’s Secondary Metabolites: Inhibition and Molecular Docking against Rhynchophorus ferrugineus for Optimal Action

“…Various chemicals used in pest management have been isolated from plant sources [ 12 ], such as fixed, volatile oils; others have potential larvicidal components, e.g., terpenoids, alkaloids, and flavonoids [ 13 ]. Biochemicals have been shown to have a significant biocontrol impact against R. ferrugineus [ 14 ].…”

Field Exploration of the Efficacy of Some Friendly Products in Combination with Some Pesticides against the Red Palm Weevil <i>Rhynchophorus ferrugineus</i> (Olivier) (Coleoptera: Curculionidae) and Its Effect on Total Carbohydrates and Micronutrients in the Resulting Date Fruits

“…Others have evaluated the activity of three essential oils (EOs) E and aerobic fractions of A. as an alternative environmentally friendly method for the management of red palm weevil. Some researchers have tested four vegetable oils from M. officinalis, B. officinalis, L. nobilis, and C. ipecacuanha to estimate their efficacy as insecticides, their effect on some biogeographical aspects, the morphological abnormalities at all stages, and it was found that the four oils tested disrupted some biological aspects of the tested insects [8].…”