Data/hora: 13/05/2024 14:19:20

Biblioteca(s): | Epagri-Sede.
Data corrente: | 21/02/2018
Data da última atualização: | 21/02/2018
Autoria: | CASTILHOS, R. V.; GRÜTZMACHER, A. D.; COATS, J.
Título: | Acute Toxicity and Sublethal Effects of Terpenoids and Essential Oils on the Predator Chrysoperla externa (Neuroptera: Chrysopidae).
Ano de publicação: | 2017
Fonte/Imprenta: | Neotropical Entomology, Londrina, v. , n. , p. 1-7, 2017.
Idioma: | Inglês

Conteúdo:

The search for new safer insecticides has increased in recent agriculture.
Botanical compounds such as terpenoids and plant essential oils with
insecticidal activity could represent important tools in pest management,
and their risk assessment against non-target organisms is necessary
since they may serve as a precursor for the synthesis of new insecticide
active ingredients. For this study, the acute toxicity and sublethal
effects of seven terpenoids and three essential oils with recognized insecticidal
activity were evaluated on the predator Chrysoperla externa
(Hagen) (Neuroptera: Chrysopidae) in laboratory bioassays. Results indicate
that these compounds feature relative selectivity to the predator
C. externa; however, sublethal effects on reproduction were recorded
for some compounds. The phenolic monoterpenoids carvacrol and thymol
were more acutely toxic than other terpenoids screened, with LD50
<20,000 &#956;g/g; however, they were less toxic than natural pyrethrins
(toxicity standard) in these bioassays. Sublethal effects on fecundity
and fertility were observed for R-(+)-limonene, while oregano oil only
affected fecundity. The compounds evaluated here have potential to
be used as insecticides and can serve as backbone for future synthesis
of selective active ingredients; however, a complete risk assessment to
C. externa and other non-target organisms is necessary for their incorporation
in future crop protection paradigms.

Palavras-Chave: | 5-isopropyl-2-methylphenol; 5-methyl-2-isopropylphenol; biological control; botanical insecticides; lacewing; Sustainable pest management.
Categoria do assunto: | O Insetos e Entomologia
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_40435.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
Exemplares: | Epagri-Sede - (102121-1) - UPC - AP - DD -  -  -  - DIS