Insecticidal activity of Vanillosmopsis arborea essential oil and of its major constituent α-bisabolol against Callosobruchus maculatus (Coleoptera: Chrysomelidae)

Abstract

Vigna unguiculata , one of the most important legumes, mainly in underdeveloped countries, is susceptible to post-harvest losses in storage by Callosobruchus maculatus (Fabricius, 1775) (Coleoptera: Chrysomelidae). The work evaluated the toxicity, inhibition of oviposition, instantaneous rate of population growth (r i ) and the development of fumigated C. maculatus with the essential oil of Vanillosmopsis arborea and its major constituent, α -bisabolol. The experimental units consisted of 0.8 L flasks treated with concentrations of 1.2–11.2 μL L −1 of air of the essential oil of V. arborea or its major constituent applied to disks of filter paper. α -Bisabolol was quantified as 409.33 mL L −1 of the essential oil. The development rate of C. maculatus was evaluated by daily adult counts. Oviposition was evaluated at lethal concentrations (LC 50 , LC 25 , LC 10 and LC 1 ). The LC 50 and LC 95 of the essential oil of V. arborea and α -bisabolol were 5.23 and 12.97 μL L −1 of air and 2.47 and 8.82 μL L −1 of air, respectively. At some concentrations, the α -bisabolol was more toxic to males than to females of the insect. Increased concentrations of the essential oil reduced the r i , rate of development, oviposition, and number of eggs of C. maculatus and therefore have potential for pest control.

Evaluation of Drimys winteri (Canelo) Essential Oil as Insecticide against Acanthoscelides obtectus (Coleoptera: Bruchidae) and Aegorhinus superciliosus (Coleoptera: Curculionidae)

“…In overall, the bioactivity of EOs has been recorded to act by contact, ingestion and as fumigants as well as by their antifeedant or repellent action on different pest insects [ 5 , 6 , 7 ]. In this context, recent investigations have showed the insecticidal activity of different EOs to manage Prostephanus truncatus (Horn) (Coleoptera: Bostrychidae) and Trogoderma granarium (Everts) (Coleoptera: Dermestidae) infestations [ 8 ] against different flies; Calliphora vomitoria (L.) (Diptera: Calliphoridae) [ 9 ], Ceratitis capitata (Wiedemann) and Anastrepha fraterculus (Wiedemann) (Diptera: Tephritidae) [ 10 ] against Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae), the main cowpea pest [ 11 ] and against two lepidopteran pests, Spodoptera frugiperda (Walker) and Anticarsia gemmatalis (Hübner) (Lepidoptera: Noctuidae) [ 12 ], proving to be a useful and effective tool in reducing harmful insect populations and the use of conventional pesticides [ 13 ].…”

Essential oil composition ofCallistemon citrinus(Curtis) and its protective assessment towardsTribolium castaneum(Herbst) (Coleoptera: Tenebrionidae)

“…In the present study, a significant reduction in oviposition was recorded when adult beetles were exposed to different concentrations of EO. Similarly, Moura et al [22] also reported that EO derived from Vanillosn opsis arborea reduced the level of oviposition when compared to control. A previous report indicated the decreased oviposition (28%) at 5.2 mg/cm 2 concentration when the adult beetles were exposed to EO derived from leaves of C. loga .…”

“…Essential oils can exhibit fumigation toxicity, repellent activity, pupicidal activity, ovicidal, and oviposition deterrents against insect pests of stored grains [17][18][19][20][21][22]. Hence the present investigation was aimed to evaluate toxicity effect of Callistemon citrinus essential oil against Tribolium castaneum.…”

Callosobruchus embryo struggle to guarantee progeny production

“…A large number of studies have demonstrated that sublethal concentrations of essential oils influence insect biology and inhibit insect oviposition by reduction of egg number or hatchability. For example, lemongrass, rosemary, Vanillosmopsis arborea , Eucalyptus camaldulensis, and Heracleum persicum essential oils caused egg number reduction in C. maculatus 10 , 21 – 23 . It is noteworthy that in the all mentioned experiments, sexually mature adults were exposed to essential oils.…”

“…Essential oils as fumigants or contact insecticides influence insect physiology by disruption of primary metabolic pathways result in rapid death, longevity reduction, and alteration of oviposition. Plant volatiles could also cause behavioral responses in insects and synergize or increase insect responses to sex pheromones [5][6][7][8][9][10] .…”