Agricultural Science

Agricultural Science

ISSN: 2291-4471 (Print)    ISSN: 2291-448X (Online)

Volume 3 (2015), No. 1, Pages 1-12

DOI: 10.12735/as.v3i1p01

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Toxicity Effect of Three Insecticides on Important Pests and Predators in Tomato Plants

J. E. R. Gorri1  R. C. Pereira2  F. M. Alves1  F. L. Fernandes3  I. W. da Silva1  M. E. S. Fernandes3 

1Universidade Federal de Vicosa - Campus Rio Paranaiba, Rio Paranaiba, Brazil
2Universidade Federal de Vicosa, Vicosa, Brazil
3Universidade Federal de Vicosa - Campus Rio Paranaiba, Instituto Ciencias Agrarias, Rio Paranaiba, Brazil

URL: https://doi.org/10.12735/as.v3i1p01Citation: 1 (Details)

To Cite this Article     Article Views: 799     Downloads: 518  Since deposited on 2015-03-23

Abstract

The objective of this study was to evaluate insecticide toxicity on Bemisia tabaci, Tetranychus evansi, Orius insidiosus, Cycloneda sanguinea and Chauliognathus flavipes in tomato plants. The following toxicity treatments were applied: T1: control, T2: chlorpyrifos (Pitcher) 450 EC (1.25 L.ha-1), T3: chlorpyrifos 450 EC (Pitcher) (0.62 L.ha-1), T4: thiamethoxam 100 WG (1.00 L.ha-1), T5: thiamethoxam 250 WG (0.50 L.ha-1), T6: teflubenzuron 150 CS (0.025 L.ha-1) and T7: teflubenzuron 150 CS (0.0125 L.ha-1). For the sub-lethal effect, a tenth of the recommended concentration was used. The insecticide teflubenzuron was effective against whitefly nymphs, while chlorpyrifos and thiamethoxam were efficient against adult whiteflies. Insecticides at the dose and lower dose were not efficient to control the adults and nymphs of mite T. evansi. Teflubenzuron was selective at the two doses tested against C. sanguinea and C. flavipes, while thiamethoxam was selective (lower dose) against these two predators. Chlorpyrifos was selective against C. flavipes (lower dose). All insecticides were selective or moderately selective at 21 days after application. Insecticides were not efficient to control the adults and nymphs of T. evansi. The growth regulating insecticide teflubenzuron was effective against whitefly nymphs. Chlorpyrifos and thiamethoxam were efficient against adult whiteflies. In general, the insecticides neonicotinoid and pyrethroid were selective to three predatory species and had lower sublethal impact compared with the organophosphate.

Keywords: effectiveness, predators, red spider mite, selectivity, whitefly

To Cite this Article: Gorri, J. E. R., Pereira, R. C., Alves, F. M., Fernandes, F. L., da Silva, I. W., & Fernandes, M. E. S. (2015). Toxicity effect of three insecticides on important pests and predators in tomato plants. Agricultural Science, 3(1), 1-12. https://doi.org/10.12735/as.v3i1p01

Copyright © J. E. R. Gorri et al.

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This article is published under license to Science and Education Centre of North America. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License.

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Toxicity Effect of Three Insecticides on Important Pests and Predators in Tomato Plants
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