Toxicity of Some New Generation Insecticides Against Tomato Leafminer Moth,Tuta absoluta (Meyrick) Under Laboratory and Greenhouse Conditions

Document Type : Research Paper

Authors

1 Research Associate Professor, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.

2 MSc Student, Islamic Azad University, Garmsar Branch, Semnan, Iran.

3 Associate Professor , Islamic Azad University, Science and Research Branch, Tehran, Iran.

4 Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran.

Abstract

Abstract
Tomato leafminer moth (TLM), Tuta absoluta (Meyrick), is a serious new pest in field and greenhouse grown tomatoes in Iran. Chemical control is an important component of this insect pest management in outbreak conditions. This study investigates the effectiveness of five new insecticides against TLM. Bioassays were conducted on 3rd instar larvae of TLM in laboratory conditions. Also, efficacy of insecticides was evaluated in a Completely Randomized Design (CRD) with six treatments and three replications in the greenhouse. The treatments included thiocyclam (Evisect® SP 50%) with concentration of 1gl-1, flubendiamide (Takumi® WG 20%, 0.2 gl-1), chlorantraniliprole + abamectin (Voliam Targo® SC 6.3%, 0.8 g l-1), emamectin benzoate (Proclaim®  SG  5% 0.3 g l-1), Spinosad (Tracer® SC 24%, 0.25 g l-1) and control  (water spray). The bioassay results showed that chlorantraniliprole + abamectin (LC50=0.01 mg ai l-1) and thiocyclam (LC50=29.9  mg ai l-1) had the highest and the lowest toxicity on the TLM larvae, respectively. Also, the greenhouse results showed that all of the insecticides had acceptable efficacy at the tested concentrations on the TLM larvae. Voliam Targo® and Takumi® had the best efficacies against TLM on 10 and 13 days after treatment and followed by the rest insecticides. All tested  insecticides had a high potential toxicity against TLM.
 

Keywords

References

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Journal of Applied Research in Plant Protection
Volume 7, Issue 1
June 2018
Pages 99-108

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History

  • Receive Date: 19 June 2018
  • Accept Date: 19 June 2018

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