| Autor: |
Vieira Caldeira, Zaira, Alvarenga Soares, Marcus, Von dos Santos Veloso, Ronnie, Souza Silva, Cleriston, Souza Pereira Costa, Elizangela, Martins dos Santos, Marinalva, Moreira da Silva, Isabel, Meloni Silva, Wiane, Cola Zanuncio, José |
| Zdroj: |
Journal of Economic Entomology; October 2022, Vol. 115 Issue: 5 p1545-1550, 6p |
| Abstrakt: |
Palmistichus elaeisisDelvare and LaSalle 1993(Hymenoptera: Eulophidae) and neem oil are two control alternatives for the integrated management of defoliating lepidopterans. The aim of this study was to evaluate the acute and chronic toxicity of neem oil compared to the synthetic insecticide deltamethrin, on the endoparasitoid P. elaeisis, in generations F0, F1, F2, and F3. Females of P. elaeisiswere exposed to neem solutions at concentrations of 0, 1.87, 3.75, 7.50, 15.00, 30.00, and 60.00 mg ml−1, to determine the dose-response relationship and estimate the neem LC50. The sublethal effects on the parasitoid P. elaeisisin generations F0 to F3 were evaluated with these same concentrations of neem and 0.033 mg ml−1of deltamethrin. The neem LC50was estimated at 3.92 mg ml−1. The LC50for P. elaeisisis 3.83 times lower than that recommended by the neem manufacturer for pest control, demonstrating high acute toxicity to this natural enemy. The chronic toxicity of both the commercial dose and those below it to P. elaeisiscaused low sublethal effects. The correct concentration of neem oil in pest control is important, and its use should be performed with caution in integrated pest management programs using the endoparasitoid P.elaeisis to avoid causing interference between the two pest control techniques. |
| Databáze: |
Supplemental Index |
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