Efficacy of Selected Insecticides Against the South American Tomato Moth,<i>Tuta absoluta</i>Meyrick (Lepidoptera: Gelechiidae) on Tomato in the Central Rift Valley of Ethiopia

Ayalew, Gashawbeza

doi:10.4001/003.023.0205

Cited by 17 publications

(12 citation statements)

References 10 publications

(6 reference statements)

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“…In Africa, reliable studies that describe pesticide resistance in this pest are from Ethiopia, e.g. the recent work by Ayalew and Shiberu, with their colleagues [25,26].…”

Section: Introductionmentioning

confidence: 99%

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

et al. 2019

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In 2016, northern Nigeria experienced a devastating infestation by the tomato leaf miner, leading to soaring in prices of tomatoes across the country. Unfortunately, information on the resistance status of this pest is lacking in northern Nigeria, hampering appropriate control measures. Here, we identified to species level and, using bioassays, characterised insecticide susceptibility profile of a field population of a tomato leaf miner from northern Nigeria. Highest resistance was observed with λ-cyhalothrin (a Type II pyrethroid) with a low mortality (18.52% at 56 h) and LD50 of 7461.474 ppm. Resistance was also established toward propoxur and chlorpyrifos-methyl with average mortalities each of 56% and LD50s of 1023.51 ppm and 106.351 ppm, respectively. Highest susceptibility was observed from abamectin with mortality of 86% and LD50 of 0.034 ppm. Pre-exposure to the synergist piperonylbutoxide significantly recovered λ–cyhalothrin susceptibility ((mortality~90%, χ2 = 98.35, p < 0.0001) and LD50 = 0.92 ppm) implicating P450 monoxygenases. No significant changes were observed on pre-exposure to diethyl maleate and triphenylphosphate-inhibitors of glutathione S-transferases and carboxylesterases, respectively. Sequencing of domain II of the voltage-gated sodium channel established 1014F kdr mutation 100% fixed in both λ-cyhalothrin-alive and dead larvae. These findings highlight the challenges for control of this invasive agricultural pest in northern Nigeria.

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“…In Africa, reliable studies that describe pesticide resistance in this pest are from Ethiopia, e.g. the recent work by Ayalew and Shiberu, with their colleagues [25,26].…”

Section: Introductionmentioning

confidence: 99%

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

et al. 2019

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“…Poor performance by reportedly effective insecticides for controlling T. absoluta with imidacloprid suggest that the T. absoluta population which invaded Ethiopia is not resistant only to the older group of insecticides such as organophosphates (e.g. profenofos), but also relatively to the new molecules (Ayalew, 2015). Ramesh and Ukey (2007) and Kay (2006) found that imidacloprid were weak and ineffective insecticide against tomato leaf miner.…”

Section: Neonicotinoidsmentioning

confidence: 99%

Toxicity of Insecticides to Tomato Pinworm, Tuta absoluta (Meyrick) Populations from Tamil Nadu

Kumar

Jayaraj

Shanthi

et al. 2020

IJARe

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Tomato pinworm, Tuta absoluta is a serious and notorious pest on tomato. Control mainly relies on insecticides because of their high infestation levels on all plant parts and life stages of the crop. This study, investigated the efficacy of different insecticides, against Tuta absoluta for different populations in laboratory conditions. The LC 50 ranged from 0.27 to 2.0 ppm for chlorantraniliprole, from 1.01 to 2.25 ppm for flubendiamide, from 0.32 to 0.90 ppm for spinosad, from 0.98 to 6.52 ppm for imidacloprid, from 0.82 to 6.38 ppm for indoxacarb, from 967.32 to 1911.98 ppm, for chlorpyriphos, The resistance ratios ranged from 1.1 to 7.7-fold difference in all six cases. The laboratory experimental results showed that chlorantraniliprole and spinosad were the most toxic insecticides as compared to other chemicals and showed homogenous response to them.

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“…Braham et al (2012) found that Ampligo® 150ZS (a mixture of chlorantraniliprole + lambda cyhalothrin) in laboratory bioassays demonstrated good performance against T. absoluta. Ayalew (2015) in Ethiopia stated that the mean fruit infestation in the untreated control plot ranged between 54 and 76 %, while in the plots treated with diamide insecticide (chlorantraniliprole) fruit infestation was significantly lower with 2 6 % fruit damage. Moreover, Passos et al (2017) reported that chlorantraniliprole and teflubenzuron (an IGI as lufenuron) should be preferred insecticides for use in tomato leaf miner IPM programmes that aim to conserve the biological agent M. basicornis populations.…”

Section: The Second Season Of 2017mentioning

confidence: 99%

Insecticides and Their Mixtures for Controlling Tuta Absoluta Infesting Tomato under Egyptian Field Conditions

Tayeb

Saad

Fatma

2018

Alexandria Science Exchange Journal

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Field trials were carried at El-Ashartalaf feddan region, Behaira government, Egypt during two successive seasons of 2016 and 20117 to evaluate four insecticides and three of their mixtures against the tomato leafminer Tuta absoluta under field conditions. The seven evaluated insecticidal treatments were applied in three consequent sprays within an interval of 10 days between each in addition to the treatment of untreated check. The lonely or individually evaluated insecticides included chlorantraniliprole, thiamethoxam, lufenuron and chlorpyriphos which have been sprayed according to the recommendations of the Egyptian Ministry of Agriculture. Meanwhile, their evaluated mixtures: chlorantraniliprole + thiamethoxam, chlorantraniliprole+ lufenuron and thiamethoxam + lufenuronwere were applied at the rate of half recommended dose of each insecticide within the tested mixture. The obtained results showed a more or less toxic efficiency of the individually and/or admixed insecticides against the insect throughout both the seasons of 2016 and 2017. In the first season of 2016, the mixture of chlorantraniliprole + lufenuron was comparatively high effective during the elapsed period after the 1 st and 2 nd spray; furthermore it was proved to be the utmost superior efficient post the 3 rd spray achieving complete infestation reduction (100%) of larvae. During the second season of 2017, chlorpyriphos was the most effective tested individual insecticide. The mixture of chlorantraniliprole + lufenuron was proved again to be superior achieving reduction level of 100% after the 3 rd spray. Therefore, this mixture would be recommended for achieving efficient control of T. absoluta in the growing tomato plants under field conditions. It is also better to use chlorpyriphos alone in IPM program to reduce the costs and slow down the development of resistance of this insect-pest to other involved compounds in the mixtures.Keywords: Tomato plants, the tomato leafminer Tuta absoluta, insecticidal treatments, mixture of insecticides and infestation reduction percentage.

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Efficacy of Selected Insecticides Against the South American Tomato Moth,Tuta absolutaMeyrick (Lepidoptera: Gelechiidae) on Tomato in the Central Rift Valley of Ethiopia

Cited by 17 publications

References 10 publications

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

Determination of Insecticide Susceptibility of Field Populations of Tomato Leaf Miner (Tuta absoluta) in Northern Nigeria

Toxicity of Insecticides to Tomato Pinworm, Tuta absoluta (Meyrick) Populations from Tamil Nadu

Insecticides and Their Mixtures for Controlling Tuta Absoluta Infesting Tomato under Egyptian Field Conditions

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