Magnitude and Mechanism of Insecticide Resistance in Helicoverpa armigera Hub. Population of Tamil Nadu, India

Ramasubramanian, T.; Regupathy, A.

doi:10.3923/ajps.2004.94.100

Cited by 18 publications

(3 citation statements)

References 5 publications

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“…As documented in most published papers, this assay was conducted on larval stages as they are the most cropsdamaging stages [9]. The selection of larvae for insecticide susceptibility analysis was supported by several published papers and standards [17,27]. Technical grade of deltamethrin 99% (Sigma-Aldrich, Taufkirchen, Germany) was used in this assay.…”

Section: Methodsmentioning

confidence: 99%

“…With this development of insecticide resistance, the control of H. armigera has become critical in many regions worldwide [8,15]. Recent studies have reported the increased resistance of H. armigera to pyrethroids in Pakistan [16], South India [17], Spain [18] and West Africa [19]. Durigan et al [20] pointed to metabolic resistance mechanisms and showed that the quantities of cytochrome P450 (CYP337B1, CYP337B2 and CYP337B3) are greater in resistant strains compare to susceptible strains after exposure to deltamethrin.…”

Section: Introductionmentioning

confidence: 99%

“…Very little is known about the susceptibility profiles of H. armigera to the commonly used agricultural insecticide deltamethrin across agro-ecological areas in Benin. Although many studies have been conducted worldwide on H. armigera [1,12,17,19,24], very few of these research works have been carried out in the western part of Africa [11,19,21]. In Benin for example, no study had extensively and simultaneously mapped the insecticide resistance profiles of this pest on several cropping systems such as cotton, vegetable and grain legumes currently under intensification.…”

Section: Introductionmentioning

confidence: 99%

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Susceptibility Profiles of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) to Deltamethrin Reveal a Contrast between the Northern and the Southern Benin

Tossou

Tepa-Yotto

Kpindou

et al. 2019

IJERPH

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Helicoverpa armigera is an indigenous species in Africa and has been reported in the destruction of several crops in Benin. Management of H. armigera pest is mainly focused on the use of synthetic pyrethroids, which may contribute to resistance selection. This study aimed to screen the susceptibility pattern of field populations of H. armigera to deltamethrin in Benin. Relevant information on the type of pesticides used by farmers were gathered through surveys. Collected samples of Helicoverpa (F0) were reared to F1. F0 were subjected to morphological speciation followed by a confirmation using restriction fragment length polymorphism coupled with a polymerase chain reaction (RFLP-PCR). F1 (larvae) were used for insecticide susceptibility with deltamethrin alone and in the presence of the P450 inhibitor Piperonyl Butoxide (PBO). Deltamethrin and lambda-cyhalothrin were the most used pyrethroids in tomato and cotton farms respectively. All field-sampled Helicoverpa were found to be H. armigera. Susceptibility assays of H. armigera to deltamethrin revealed a high resistance pattern in cowpea (resistance factor (RF) = 2340), cotton (RF varying from 12 to 516) and tomato (RF=85) farms which is a concern for the control of this major polyphagous agricultural pest. There was a significant increase of mortality when deltamethrin insecticide was combined with piperonyl butoxide (PBO), suggesting the possible involvement of detoxification enzymes such as oxidase. This study highlights the presence of P450 induced metabolic resistance in H. armigera populations from diverse cropping systems in Benin. The recorded high levels of deltamethrin resistance in H. armigera is a concern for the control of this major agricultural pest in Benin as the country is currently embarking into economical expansion of cotton, vegetables and grain-legumes cropping systems.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Susceptibility Profiles of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) to Deltamethrin Reveal a Contrast between the Northern and the Southern Benin

Tossou

Tepa-Yotto

Kpindou

et al. 2019

IJERPH

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Characterization of Bacillus thuringiensis isolates and their differential toxicity against Helicoverpa armigera populations

Anitha

Kumar

Vijayan

et al. 2010

J. Basic Microbiol.

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Bacillus thuringiensis isolates were characterized in rhizospheric cotton soils by using acetate selection process from eight different locations in South India. The fact that B. thuringiensis indices were higher in proportion in soil samples taken from Tamil Nadu and Karnataka than from Andhra Pradesh, indicates the abundance of B. thuringiensis populations in the cotton rhizosphere. Biochemical typing of the isolates designated eight local isolates (BtNg13, BtCo1, BtHyb7, BtAm2, BtRm5, BtWr3, BtPl 4, BtN 9), which belong to subspecies kurstaki, the most prevalent subspecies. Toxicity assays on American boll worm larval (F(1) ) populations collected from the Andhra Pradesh, Bangalore and Coimbatore regions, with a susceptible insect strain against different isolates of B. thuringiensis kurstaki spore-crystal mix, revealed distinct susceptibility patterns and specificity. The highest susceptibility was observed in the F(1) populations of Coimbatore, followed by Bangalore and Hyderabad populations, in comparison with the susceptible insect strain. Significant differences were observed (p < 0.0005 and CD = 5.3975) among Btk local isolates, H. armigera biotypes, Btk spore-crystal mix concentration and their interactions, through the Multifactorial ANOVA analysis. The toxicity of local B. thuringiensis isolates was higher than that of HD-1 (reference B.t.k strain). Indigenous Btk isolates have an enormous potential for the management of H. armigera in terms of development of resistance to HD-1. The present study would serve as a baseline data for future resistance monitoring of B. thuringiensis strains in H. armigera in Southern India.

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Insektizidresistenz-Management bei Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) und die Auswirkung auf Schädlinge und Erträge von Baumwolle in Nord-Indien

2006

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Magnitude and Mechanism of Insecticide Resistance in Helicoverpa armigera Hub. Population of Tamil Nadu, India

Cited by 18 publications

References 5 publications

Susceptibility Profiles of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) to Deltamethrin Reveal a Contrast between the Northern and the Southern Benin

Susceptibility Profiles of Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) to Deltamethrin Reveal a Contrast between the Northern and the Southern Benin

Characterization of Bacillus thuringiensis isolates and their differential toxicity against Helicoverpa armigera populations

Insektizidresistenz-Management bei Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae) und die Auswirkung auf Schädlinge und Erträge von Baumwolle in Nord-Indien

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