Bioactivity of <I>Piper hispidinervum</I> (Piperales: Piperaceae) and <I>Syzygium aromaticum</I> (Myrtales: Myrtaceae) Oils, With or Without Formulated Bta on the Biology and Immunology of <I>Spodoptera frugiperda</I> (Lepidoptera: Noctuidae)

Abstract

The combination of essential oils and Bacillus thuringiensis Berliner may represent an interesting control strategy. Thus, the study tested the following hypothesis: the combination of long pepper oil (Piper hispidinervum L.) and clove (Syzygium aromaticum L.) oils in two concentrations with Xentari WG (Bta) yields a more effective control of Spodoptera frugiperda (JE Smith) (Lepidoptera: Noctuidae) affecting biological and reproductive parameters and leading to changes in the levels of phenoloxidase and nitric oxide in the hemolymph of the pest. The results demonstrate that only long pepper oil, at the highest concentration with Xentari WG (Bta), promotes reduced larval survival. However, both oils with or without the insecticide interfere in the biology and humoral immunity of S.frugiperda. All treatments caused a decrease in the amount of eggs, except for the clove oil at both concentrations without Bta. Therefore, the use of these oils is a promising alternative for the integrated management of S. frugiperda; however, its association with Bta demonstrated no significant increase in their efficiency.

The Sublethal Effects of Insecticides in Insects

“…The insecticidal activity of essential oils is based on the high concentrations of major compounds that belong to the classes of terpenes, phenolics and alkaloids [15]. The essential oils of long pepper and clove demonstrated the activity of these substances on several biological parameters of Spodopetra frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), such as reduced survival periods, alterations in larval and pupal weight and period, and decreased longevity, fecundity and fertility [16]. The essential oils of Eucalyptus staigeriana F. Muell.…”

Produção E Qualidade Da Batata Doce Em Resposta a Lâminas De Irrigação

“…Os óleos essenciais e seus constituintes isolados ou associados vêm sendo constantemente estudados para o controle de insetos-praga. Além disso, existem trabalhos mostrando que diferentes compostos podem causar efeitos sobre o potencial reprodutivo de fêmeas tratadas alterando assim a fecundidade de S. frugiperda (ALVES et al, 2013, CRUZ et al, 2014, SILVA et al, 2016, CRUZ et al, 2017. O óleo essencial de Piper hispidinervum C. DC.…”

“…O óleo essencial de Piper hispidinervum C. DC. já foi identificado como tóxico a S. frugiperda (ALVES et al, 2013, CRUZ et al, 2014 e o composto isolado geraniol pode atuar como repelente, inseticida e inibidor de crescimento (CHEN & VILJOEN, 2010). No que se refere a inibiçãode oviposição o óleo essencial de folhas e caule de P. marginatum reduziu a oviposição (<50%) a 50 e 100 ppm de Aedes aegypti (L.) (AUTRAN et al, 2009).…”

Potentially Phytotoxic of Chemical Compounds Present in Essential Oil for Invasive Plants Control: A Mini-Review

“…Other authors also report the potentially allelopathic activity of clove essential oil Syzygium aromaticum [56][57][58]. In addition to eugenol, other phenylpropanoids present in essential oils with phytotoxic activity are eugenyl acetate, safrole, methyl eugenol, anethole, myristicin, estragole, anethole and trans-anethole [36,[59][60][61][62][63][64]. shows the chemical structures of the phenylpropanoids with potential use for control of invasive plants.…”