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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Período residual de controle, rapidez de ação e seletividade de inseticidas a Ascia monuste e ao predador Solenopsis saevissima / Residual period of control, speed of action and selectivity of insecticides to Ascia monuste and predator Solenopsis saevissima

Araújo, Tamíris Alves de 20 February 2015 (has links)
Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2018-04-17T13:39:05Z No. of bitstreams: 1 texto completo.pdf: 418759 bytes, checksum: 0fa717dff38084a063271f3027d248e3 (MD5) / Made available in DSpace on 2018-04-17T13:39:05Z (GMT). No. of bitstreams: 1 texto completo.pdf: 418759 bytes, checksum: 0fa717dff38084a063271f3027d248e3 (MD5) Previous issue date: 2015-02-20 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Os inseticidas usados em programas de manejo integrado de pragas devem ser eficazes no controle das pragas e ter baixo impacto sobre organismos não-alvo como os inimigos naturais. Ascia monuste (Lepidoptera: Pieridae) é uma importante praga de brássicas nas Américas. Um importante predador desta praga é a formiga Solenopsis saevissima (Hymenoptera: Formicidae). Assim o objetivo deste trabalho foi selecionar inseticidas a serem usados em programas de manejo integrado de A. monuste. Os inseticidas estudados foram: cartape, ciantraniliprole, flubendiamida, clorantraniliprole, indoxacarbe, clorfenapir, malationa e deltametrina, metomil. Com espinosade, exceção de flubendiamida os demais inseticidas foram eficientes (mortalidade>80%) no controle de A. monuste. Cartape e deltametrina apresentaram as ações mais rápidas de controle da praga (<1h). Malationa e metomil apresentaram os menores períodos residuais de controle (3 dias) enquanto ciantraniliprole e clorfenapir tiveram os maiores períodos residuais de controle (>60 dias). Ciantraniliprole, clorantraniliprole, espinosade e indoxacarbe apresentaram seletividade fisiológica ao predador. Monooxigenases dependentes do citocromo P450, glutationa S-transferases e esterases estiveram envolvidas na seletividade dos inseticidas ao predador. O alto impacto de cartape, clorfenapir, malationa ao predador não diminuiu 22, 11 e 60 dias após as aplicações. Já metomil e deltametrina não causaram impacto ao predador 3 e 5 dias após suas aplicações. / The insecticides used in integrated pest management programs must be effective in pest control and have low impact on non-target organisms such as natural enemies. Ascia monuste (Lepidoptera: Pieridae) is an important pest of brassica in Americas. An important predator of this pest is the ant Solenopsis saevissima (Hymenoptera: Formicidae). Thereby the aim of this work was to select insecticides to be used in integrated pest management programs of A. monuste. The insecticides studied were: cartap, cyantraniliprole, chlorantraniliprole, chlorfenapyr, deltamethrin, spinosad, flubendiamide, indoxacarb, malathion and methomyl. Except for flubendiamide the other insecticides were effective (mortality> 80%) in the control of A. monuste. Cartap and deltamethrin showed the fastest actions of pest control (<1h). Malathion and methomyl had the shortest residual control periods (3 days) while cyantraniliprole and chlorfenapyr had the longest residual control periods (> 60 days). Cyantraniliprole, chlorantraniliprole, spinosad and indoxacarb showed physiological selectivity to the predator. Monooxygenases dependent of the cytochrome P450, glutathione S-transferases and esterases were involved in the selectivity of insecticides predator. The high impact of cartap, chlorfenapyr, malathion to predator not decreased by 22, 11 and 60 days after treatment. The methomyl and deltamethrin did not affect the predator 3 and 5 days after their applications.

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