Evaluation of the Different Control Methods for the Two-Spotted Spider Mites by Computer Software and Percentage Efficacy

Alzoubi, Saied; Cobanogu, Sultan

doi:10.3923/je.2008.290.294

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…compound exhibiting highest LC50 values of 21.29, 13.18, and 6.40 mg/L, which represented the least toxicity index of 5.53, 4.32, and 3.44% compared with Ignar ® at the same bioassay periods. These results are in line with Alzoubi and Çobanoğlu (2008) and Taha (2017).…”

Section: B the Immature Stagesupporting

confidence: 89%

Acaricidal Management of Abamectin Mixtures against All Stages 0f the Two-Spotted Spider Mite, Tetranychus urticae Koch, Infesting Cucumber Plants

Saad

Massoud

El-Shazly

et al. 2023

Alexandria Science Exchange Journal

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Tetranychus urticae is a worldwide common pest for many vegetable species in greenhouses and open fields. The study was conducted to evaluate the performance of two acaricide mixtures: Highpoint ® 10% EC (abamectine + hexythiazox) and Ignar ® 20% SC (abamectine + spirodiclofen), as well as a single active ingredient, Envidor ® 24% SC (spirodiclofen), against the two-spotted spider mite in greenhouse and lab experiments.In the greenhouse experiment, both Ignar ® and Highpoint ® outperformed Envidor ® acaricide against the adult and immature stages through the first 3 days in both experimental seasons. After 24 hours, Ignar ® and Highpoint ® achieved the highest efficacy with percent of reduction 95.00 and 94.86 in the 1 st season and 97.84 and 95.76% in the 2 nd season, respectively. Meanwhile, Envidor ® gave lower reduction percentages of 84.93 and 83.88%, respectively. Regarding the immature stage, Ignar ® , Highpoint ® , and Envidor ® achieved reductions of 95.63%, 94.26%, and 83.31% after 24 hours for the first season and 94.09, 95.79, and 80.57% in the second season, respectively. The residual efficacy gradually decreased to reach 62.22 and 59.72% for Ignar ® and 58.31 and 59.31% for Highpoint ® in both seasons.On the other hand, the initial kill for all acaricides against the egg stage was low after 24 hours. However, after 3 days, Ignar ® and Highpoint ® showed a sharp increase in efficacy, with a reduction percent (81.24 and 51.60% in the 1 st season) and (73.83 and 81.86% in the 2 nd season), respectively. Envidor ® showed high efficacy only at the 7 th day, with varying efficacy during the inspection periods.Laboratory bioassay tests revealed that Ignar ® was the most toxic acaricide against T. urticae adults and immatures, with a 100% toxicity index. Highpoint ® had a moderate toxicity index against adult and immature stages, while Envidor ® was less effective. Ignar ® and Highpoint ® were the most toxic compounds against eggs.Abamectin mixtures are the most toxic compounds. Highpoint ® and Ignar ® , were considered to have the best efficacy on all developmental stages of the two-spotted spider mite. Due to the extensive use of abamectin to eliminate mites and numerous sucking insects, it is better to avoid its repeated use alone or in the same mixtures to control mites for more than one or two applications in the season.The data may suggest that the appropriate acaricide for integrated pest management (IPM) for all stages of T. urticae could be Ignar ® and Highpoint ® .

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Section: B the Immature Stagesupporting

confidence: 89%

Acaricidal Management of Abamectin Mixtures against All Stages 0f the Two-Spotted Spider Mite, Tetranychus urticae Koch, Infesting Cucumber Plants

Saad

Massoud

El-Shazly

et al. 2023

Alexandria Science Exchange Journal

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“…Embora dimetoato tenha se mostrado altamente eficiente contra o ácaro-hindustânico-dos-citros, esse acaricida não tem se mostrado efetivo no controle de diversas espécies de ácaros-praga, tais como Tetranychus urticae (Koch) (SATO et al, 2000;ALZOUBI;COBANOgU, 2008) e Tetranychus cinnabarinus (Boisd.) (DEEP; DHOORIA, 2004).…”

Section: Resultsunclassified

Efeito de acaricidas sobre Schizotetranychus hindustanicus (Hirst) (Acari: Tetranychidae) e ácaros predadores em citros no Estado de Roraima, Brasil

Júnior

Sato

Aguiar³

et al. 2012

Arq. Inst. Biol.

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RESUMOO ácaro-hindustânico-dos-citros, Schizotetranychus hindustanicus (Hirst), é uma praga de importância quarentenária, recentemente introduzida no Brasil. Até a condução do presente estudo, não havia informações na literatura sobre a eficiência de acaricidas no controle de S. hindustanicus, em condições de campo. O estudo teve por objetivo avaliar o efeito de alguns acaricidas, utilizados em pomares de citros no país, sobre o ácaro-praga e ácaros predadores (Phytoseiidae) presentes na cultura. O experimento foi conduzido em um pomar de citros (limão-tahiti), em Boa Vista, RR. Os acaricidas testados e respectivas concentrações (g i.a./100 L de água) foram: mancozebe (200), abamectina (0,36), espirodiclofeno (6), enxofre (400) e dimetoato (80). A aplicação foi realizada com equipamento acoplado a um trator, provido de pistolas, aplicando-se 10 litros de calda por planta. O delineamento estatístico foi inteiramente casualizado com seis tratamentos e cinco repetições. As avaliações foram realizadas aos 1, 4, 7, 14, 28, 42 e 56 dias após a aplicação (DAA). Em cada avaliação, foram coletados 20 folhas e 10 frutos por parcela, contando-se o número de ácaros S. hindustanicus e fitoseídeos. Todos os produtos reduziram significativamente a população do ácaro-hindustânico nas folhas até 28 DAA. Os acaricidas dimetoato e espirodiclofeno foram altamente eficientes no controle de S. hindustanicus, sendo que o espirodiclofeno apresentou um período de controle mais longo que dimetoato. Com relação aos ácaros predadores, dimetoato, enxofre e abamectina causaram mortalidades significativas (72 a 100%) aos fitoseídeos, até 4 DAA. A espécie predominante de fitoseídeo foi Euseius concordis (Chant), correspondendo a 71% dos ácaros observados. PALAVRAS-CHAVE: Ácaro-hindustânico-dos-citros, limão-tahiti, controle químico, Phytoseiidae. (Hirst) is a pest of quarantine importance, recently introduced in Brazil. There was no information in the literature, on the efficacy of acaricides for the control of S. hindustanicus (Hirst) under field conditions, up to the conduction of this research. The objective of this study was to evaluate some acaricides currently used in citrus orchards, determining their effect on pest mites and predaceous mites (Phytoseiidae) living among the crop. The experiment was carried out in a citrus orchard (Tahitian lime), in the Boa Vista municipality, in the state of Roraima, Brazil. The acaricides studied and their respective concentrations (g a.i./100 l of water) were: mancozeb (200), abamectin (0.36), spirodiclofen (6), sulphur (400) and dimethoate (80). The application was made using tractor-mounted hydraulic handgun sprayers, using a volume of 10 L of acaricide suspension per plant. The statistical design was a completely randomized design with six treatments and five replicates. The evaluations of the effect of chemicals on the populations of S. hindustanicus and predaceous mites (Phytoseiidae) were carried out at 1, 4, 7, 14, 28, 42 and 56 days after treatment (DAT). During each evaluation, 20 leaves and...

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“…The entire data of the treatment units were examined at the 5% level by DMRT. The corrected % reduction of phytophagous and predatory mite populations was carried out by using the Henderson and Tilton formula (Alzoubi and Cobanogu, 2008) as follows:…”

Section: Discussionmentioning

confidence: 99%

“…Many tarsonemid species are fungivores, algivores and herbivores and others are predators of other mites, parasites of insects and possibly symbionts of insects (Zhang, 2003). Though more than 20 insect and non-insect pests attack pepper plants, such as the yellow mite, which is also known as a broad mite, white mite and muranai mite, Polyphagotarsonemus latus (Banks) which is the most destructive among them (Alzoubi and Cobanogu, 2008). The major pests of this crop include several species of lepidopteran insects, whitefly, thrips, aphid and phytophagous mites, causing severe damages and substantial losses in crop yield (Srinivasan, 2009;Reddy and Miller, 2014).…”

Section: Introductionmentioning

confidence: 99%

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

Morsy

Elwan

2022

Alexandria Science Exchange Journal

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Yellow mite, Polyphagotarsonemus latus (Banks) is the greatest destructive pest on pepper plants in Egypt. The efficacy of bifenthrin 25% EC against the yellow mite Polyphagotarsonemus latus (Banks) and its impact on natural enemies (predatory mites) were assessed through three field experiments conducted at Wadi Al-Mollak, East Delta, Egypt for three seasons. The treatments included bifenthrin applied at the rate of 40, 50, 60, 80, 100, 160 and 320g a.i.ha -1 compared with standard check dicofol at 290 g a.i.ha -1 and an untreated check. Obtained percentages of reduction in yellow and predatory mites were 1, 3, 5, 7, and 14 days after spraying. The initial population of mites/leaf before first spraying ranged from 3.83 to 4.91 in all the treatments without any significant difference. The dose of 80 g a.i.ha -1 of bifenthrin had a significant effect on the entire treatments units. The standard check dicofol at 290 g a.i.ha -1 recorded 71.81, 73.63 and 67.76% of reduction in mite population at first, second and third experiment after first spraying, respectively, and 74.76, 85.09 and 76.09% of reduction at first, second and third experiment after second spraying, respectively. The initial population of predatory mites, Amblyseius ovalis ranged from 0.70 to1.11 mites/leaf in the entire treatment. Dicofol at 290 g a.i.ha -1 caused the highest reduction of 49.77, 56.75 and 54.56 % in the first, second and third experiment, respectively. The lowest dose of bifenthrin at 40 g a.i.ha -1 was the least toxic treatment, The toxicity order for different bifenthrin doses against predatory mites and were 320 > 160 > 80 > 100 > 60 > 50 > 40 g a.i.ha-1. Dicofol was highly toxic to A. ovalis compared to bifenthrin treatments. Even after 14 days of spraying nearly 50% reduction was noticed in the case of dicofol. It can be conducted that bifenthrin was found to be relatively safer than dicofol because most likely due to its residues being longer than bifenthrin.

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Evaluation of the Different Control Methods for the Two-Spotted Spider Mites by Computer Software and Percentage Efficacy

Cited by 3 publications

References 10 publications

Acaricidal Management of Abamectin Mixtures against All Stages 0f the Two-Spotted Spider Mite, Tetranychus urticae Koch, Infesting Cucumber Plants

Acaricidal Management of Abamectin Mixtures against All Stages 0f the Two-Spotted Spider Mite, Tetranychus urticae Koch, Infesting Cucumber Plants

Efeito de acaricidas sobre Schizotetranychus hindustanicus (Hirst) (Acari: Tetranychidae) e ácaros predadores em citros no Estado de Roraima, Brasil

Impact of Bifenthrin on Yellow Mite in Pepper Plants under Field Conditions at Wadi Al-Mollak, East Delta, Egypt

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