Botanical Extracts of the Brazilian Savannah Affect Feeding and Oviposition of Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae)

Abstract

The indiscriminate use of synthetic insecticides caused an increase in the resistance of Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) to almost all classes of insecticides, as well as affected the environment and non-target organisms. Thus, the search for less harmful alternatives with the purpose of reducing the application of these insecticides has become a priority. A possible alternative to reduce the use of synthetic insecticides is by using botanical insecticides, given the thousands of existing compounds derived from secondary metabolism in plants. In this study, we tested the following hypotheses: (i) the aqueous and ethanolic extracts of native plants reduce the food consumption of larvae and oviposition of adults of P. xylostella; (ii) these botanical species can act as potential plant insecticides. The objective of this work was to evaluate the effect of plant extracts on the feeding preference of larvae and oviposition of adults of P. xylostella. For this, cabbage discs treated with aqueous and ethanolic extracts of Schinus terebinthifolius, Annona coriacea, Annona crassiflora and Serjania marginata were given to larvae. The concentrations used for the aqueous extracts were of 5 and 10 mg mL-1, and for the ethanolic extracts were of 1 and 5 mg mL-1. Both extracts of the four tested plant species showed oviposition suppressed. The extract of S. marginata showed the lowest rates of suppression. All treatments with ethanolic extracts showed a phagodeterrant effect being that the aqueous and ethanolic extracts of A. crassiflora and S. terebinthifolius were the most effective as antifeedants on third instar larvae by P. xylostella.

Phytochemical Screening and Bioactivity of Ludwigia spp. in the Control of Plutella xylostella (Lepidoptera: Plutellidae)

“…A number of studies have been performed to determine the insecticidal potential of botanical oils and extracts of certain species—Myrtaceae [ 21 ], Rubiaceae [ 22 ], Anonnaceae [ 23 , 24 ], Meliaceae, Anacardiaceae [ 24 , 25 ], Apocynaceae [ 26 , 27 ], Sapindaceae and Fabaceae [ 28 ]—and the oil of Rutaceae [ 29 ] on the development and/or oviposition of P. xylostella and, consequently, the occurrence of antibiosis and antixenosis.…”

Methanolic Extract of Winter Cherry Causes Morpho-Histological and Immunological Ailments in Mulberry Pyralid Glyphodes pyloalis

“…According to a Tukey's test. Couto et al, 2019). In the present study, the extract used also suppressed G. pyloalis fecundity which was complemented with histological and biochemical investigation on the adult ovary resulting from treated larvae.…”

“…Reproduction in insects has been the target for pest control and thus chemicals that could suppress insect reproduction has attracted scientists‘ attention long time ago. Hence, this aspect of pest control via biorational chemicals have been the core of several researches ( Sahayaraj and Alakiaraj, 2006 ; Riddiford, 2012 ; Ribeiro et al, 2015 ; Lau et al, 2018 ; Abdelgaleil et al, 2019 ; Couto et al, 2019 ). In the present study, the extract used also suppressed G. pyloalis fecundity which was complemented with histological and biochemical investigation on the adult ovary resulting from treated larvae.…”

Efeito de extratos aquosos de Serjania spp. sobre a oviposição de Plutella xylostella L. (Lepidoptera: Plutellidae)

“…Os inseticidas botânicos apresentam vantagens e praticidades, como a utilização de plantas nativas, baixo impacto ambiental, além do baixo custo, sendo assim, vantajoso principalmente para os pequenos produtores (Amoabeng et al, 2013;Pavela, 2016). A prospecção de espécies botânicas para o desenvolvimento de estudos que promovam a investigação de bioatividade vegetal com ênfase na ação inseticida tem aumentado ao longo dos anos (Isman, 2014;Peres et al, 2017;Fonseca et al, 2018;Couto et al, 2019Couto et al, , 2020Souza et al, 2019;Ferreira et al, 2020). Alguns trabalhos demonstram que os inseticidas botânicos podem inibir e reduzir a alimentação e reprodução de insetos (Couto et al, 2019), reduzir a fecundidade (Couto et al, 2020), interferir na síntese de ecdisona e causar esterilidade (Schmutterer et al, 1988;Mordue & Blackwell 1993), além de provocar deformações em pupas e adultos e ocasionar mortalidade de indivíduos imaturos e adultos (Peres et al, 2017).…”

“…Dentre as famílias vegetais, a Sapindaceae é investigada em alguns estudos apresentando espécies com potencial ação inseticida (Couto et al, 2019;Ramírez-Zamora et al, 2020). Os compostos mais abundantes encontrados nessa família são os compostos fenólicos, flavonoides, esteroides, taninos, saponinas e antraquinonas, que podem apresentar ação inseticida para determinados insetos (Quintanilla et al, 2014;Guimarães et al, 2015;Moreira et al, 2019Salinas-Sánchez et al, 2020.…”