Insecticides against <i>Maruca vitrata</i> (Fabricius) (Lepidoptera: Crambidae) on Pigeonpea

Mahalle, Rashmi Manohar; Taggar, Gaurav Kumar

doi:10.5958/2249-524x.2018.00037.7

Cited by 4 publications

(3 citation statements)

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“…Legume farmers rely primarily on chemical insecticides as the primary control method to tackle M. vitrata damage [5]. However, the extensive utilization of insecticides has increased resistance in this pest species against them, thereby leading to population outbreaks and rendering its management more difficult [6].…”

Section: Introductionmentioning

confidence: 99%

De Novo Mining and Validating Novel Microsatellite Markers to Assess Genetic Diversity in Maruca vitrata (F.), a Legume Pod Borer

Mahalle

Bosamia

Chakravarty

et al. 2023

Genes

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Maruca vitrata (Fabricius) is an invasive insect pest capable of causing enormous economic losses to a broad spectrum of leguminous crops. Microsatellites are valuable molecular markers for population genetic studies; however, an inadequate number of M. vitrata microsatellite loci are available to carry out population association studies. Thus, we utilized this insect’s public domain databases for mining expressed sequence tags (EST)-derived microsatellite markers. In total, 234 microsatellite markers were identified from 10053 unigenes. We discovered that trinucleotide repeats were the most predominant microsatellite motifs (61.53%), followed by dinucleotide repeats (23.50%) and tetranucleotide repeats (14.95%). Based on the analysis, twenty-five markers were selected for validation in M. vitrata populations collected from various regions of India. The number of alleles (Na), observed heterozygosity (Ho), and expected heterozygosity (He) ranged from 2 to 5; 0.00 to 0.80; and 0.10 to 0.69, respectively. The polymorphic loci showed polymorphism information content (PIC), ranging from 0.09 to 0.72. Based on the genetic distance matrix, the unrooted neighbor-joining dendrogram differentiated the selected populations into two discrete groups. The SSR markers developed and validated in this study will be helpful in population-level investigations of M. vitrata to understand the gene flow, demography, dispersal patterns, biotype differentiation, and host dynamics.

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Section: Introductionmentioning

confidence: 99%

De Novo Mining and Validating Novel Microsatellite Markers to Assess Genetic Diversity in Maruca vitrata (F.), a Legume Pod Borer

Mahalle

Bosamia

Chakravarty

et al. 2023

Genes

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“…The frequent application of insecticides has resulted in an increased resistance to these insecticides. It has been observed in recent years that previously effective insecticides have acquired reduced effectiveness on M. vitrata in the country, thereby leading to population outbreaks [8]. For sustainable and effective control of pest insects, the adoption of insecticide resistance management (IRM) techniques is considered to be important.…”

Section: Introductionmentioning

confidence: 99%

Population Genetic Differentiation and Structure of Maruca vitrata (Lepidoptera: Crambidae) in India

2022

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Maruca vitrata is one of the primary biotic constraints for pigeon pea production in India. The present study assessed the genetic variation and population structure of M. vitrata from diverse agro-ecologies in India using the mitochondrial cytochrome c oxidase I gene. A low number of segregating sites (10), haplotypes (13), nucleotide diversity (0.00136), and overall mean genetic distance (0.0013) were observed among the populations. The negative values of the neutrality tests and unimodal mismatch distribution supported its demographic expansion in the country. The analysis of molecular variance (AMOVA) revealed that the variation among populations or groups was only 13.91%, and the geographical distance did not significantly contribute to the genetic differentiation (R2 = 0.0024, p = 0.280). The clustering of haplotypes was also independent of the geographical location. Overall, our results suggest the existence of low genetic variation and high gene flow among populations of M. vitrata in India.

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“…Currently, the primary method of controlling M. vitrata involves the use of chemical insecticides, as no Maruca-resistant varieties are available (Srinivasan et al, 2021). Frequent application of insecticides has led to increased resistance contributing to outbreaks (Mahalle and Taggar, 2018) and other adverse impacts (Lazaro et al, 1995;Ekesi, 1999. In response to these challenges, insect pathogenic viruses, such as granulovirus (GV) and cypovirus (CPV), have been explored as potential alternatives. Field observations in Kenya, Benin, and China had reported GV and CPV infections (Otieno et al, 1983).…”

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Report of <i>Maruca vitrata</i> (F) Nucleopolyhedrovirus

Pavan,

Dodiya,

Rudra Gouda

et al. 2024

IJE

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This study explores the potential of nucleopolyhedroviruses (NPVs) as a sustainable solution for managing legume pod borer Maruca vitrata (F). Distinctive signs of viral infection, such as suspended deceased larvae on cowpea leaves, and virus spread have been observed. Microscopic examination reveals characteristic polyhedral inclusion bodies (PIBs), confirming MaviNPV as the causative agent. Symptoms, including decreased activity and mortality in younger larvae, larval-pupal intermediates and deformed pupae have been observed. Reproductive disruption is evident through the absence of an egg mass and discharge of fluid from emerged adults. Bioassay results highlight age-dependent susceptibility, with higher mortality in early instars.

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Insecticides against Maruca vitrata (Fabricius) (Lepidoptera: Crambidae) on Pigeonpea

Cited by 4 publications

References 0 publications

De Novo Mining and Validating Novel Microsatellite Markers to Assess Genetic Diversity in Maruca vitrata (F.), a Legume Pod Borer

De Novo Mining and Validating Novel Microsatellite Markers to Assess Genetic Diversity in Maruca vitrata (F.), a Legume Pod Borer

Population Genetic Differentiation and Structure of Maruca vitrata (Lepidoptera: Crambidae) in India

Report of <i>Maruca vitrata</i> (F) Nucleopolyhedrovirus

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