Selective effects of natural and synthetic insecticides on mortality ofSpodoptera frugiperda(Lepidoptera: Noctuidae) and its predatorEriopis connexa(Coleoptera: Coccinellidae)

Autor:	Wagner de Souza Tavares, Mariana Abreu Costa, José Cola Zanuncio, Ivan Cruz, José Eduardo Serrão, Rodrigo D Silveira
Rok vydání:	2010
Předmět:	Insecticides Time Factors Spodoptera Zea mays Glycerides Lepidoptera genitalia Toxicology chemistry.chemical_compound Animals Lufenuron Eriopis connexa Biological Products Neem oil biology Terpenes fungi General Medicine biology.organism_classification Pollution Coleoptera Survival Rate Biopesticide Azadirachtin chemistry Agronomy Predatory Behavior Benzamides Noctuidae Coccinellidae Biological Assay Brazil Food Science
Zdroj:	Journal of Environmental Science and Health, Part B. 45:557-561
ISSN:	1532-4109 0360-1234
DOI:	10.1080/03601234.2010.493493
Popis:	Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) is a serious pest of corn in several American countries. It is mainly controlled with synthetic insecticides. The objectives of this study were to evaluate the effects of the natural products, neem oil and pyroligneous extract, and the synthetic insecticide, lufenuron, at 2.50 mL water (0.25%) on the mortality of 2-, 4- and 6-day-old caterpillars of S. frugiperda, and their selectivities against fourth instar larvae of Eriopis connnexa Germar (Coleoptera: Coccinellidae). Four- and 6-day-old S. frugiperda caterpillars showed higher mortality after exposure to neem oil (83.33 +/- 0.83 and 89.58 +/- 0.90%, respectively) and lufenuron (95.83 +/- 0.96 and 85.41 +/- 0.83%), compared to pyroligneous extract (68.75 +/- 0.69 and 31.25 +/- 0.31%). The deleterious effect of pyroligneous extract was higher in 2- (83.33 +/- 0.83% mortality) and 4-day-old (68.75 +/- 0.69%) S. frugiperda caterpillars than in 6-day-old caterpillars (31.25 +/- 0.31%). Larval mortality of the predator E. connexa was lower with neem oil and pyroligneous extract (25.00 +/- 0.33%) than with lufenuron (91.66 +/- 1.22%). Neem oil is thus recommended for control of S. frugiperda because of its high toxicity, combined with its relatively low toxicity to larvae of the natural enemy E. connexa.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e51f19dddee1d7ab80d8c74b0c66780 https://doi.org/10.1080/03601234.2010.493493 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.