Spiromesifen toxicity to the spider mite Tetranychus urticae and selectivity to the predator Neoseiulus californicus

Autor(es)

Sato, Mario E. ^[1] ; da Silva, Marcos Z. ^[1] ; Raga, Adalton ^[2] ; Cangani, Katia G. ^[1] ; Veronez, Bruce ^[1] ; Nicastro, Roberto L. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Biol, Lab Acarol, BR-13092543 Campinas, SP - Brazil

^[2] Inst Biol, Lab Econ Entomol, BR-13092543 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PHYTOPARASITICA; v. 39, n. 5, p. 437-445, NOV 2011.
• Citações Web of Science: 10

Resumo

Tetranychus urticae Koch (Acari: Tetranychidae) is a major pest of several agricultural crops and Neoseiulus californicus (McGregor) (Acari: Phytoseiidae) is an important natural enemy of this pest mite. The objective of the study was to evaluate the effect of spiromesifen on the development and reproduction of T. urticae, and to assess the influence of spiromesifen and other acaricides on the population growth rates of the spider mite and its predator, N. californicus. Toxicity tests with spiromesifen at different life stages of T. urticae indicated that eggs less than 72 h old were more sensitive than other development stages. The oviposition rate of T. urticae was significantly affected by spiromesifen. Experiments on the effects of spiromesifen on the growth rates of T. urticae and N. californicus indicated that spiromesifen is innocuous to the predaceous mite but highly toxic to the spider mite, leading to population suppression in 10 days. Fenpropathrin, acephate and neem oil were not harmful to N. californicus, but were not so efficient as spiromesifen in controlling T. urticae, and had significantly less influence on the population growth rates of the spider mite. Among these three products, only neem oil caused significant reduction in the growth rate of T. urticae. Chlorfenapyr, abamectin, milbemectin and diafenthiuron significantly affected the population growth rates of T. urticae and N. californicus. Spiromesifen was the most promising acaricide for managing the two-spotted spider mite, when used in combination with N. californicus. (AU)

• Processo FAPESP: 07/02748-1 - Resistência de Tetranychus urticae Koch aos acaricidas milbemectin e abamectin e manejo do ácaro-praga em morangueiro e ornamentais com utilização de ácaros predadores da família Phytoseiidae
• Beneficiário: Roberto Lomba Nicastro
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 07/08612-4 - Estudos de resistência de tripes (Frankliniella occidentalis) e ácaros (Tetranychus urticae) a pesticidas, em diversas culturas, e preferência hospedeira destas pragas em ornamentais no estado de São Paulo
• Beneficiário: Mário Eidi Sato
• Modalidade de apoio: Auxílio à Pesquisa - Regular