Karyomorphological effects of two new oil formulations on Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

Pavunraj, Manickam; Baskar, Kathirvelu; Arokiyaraj, Selvaraj; Ignacimuthu, S.; Alqarawi, Abdulaziz A.

doi:10.1016/j.sjbs.2020.12.010

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Helicoverpa armigera belongs to insect family noctuidae and order lepidoptera. It is a nightmare to tomato farmers and is attracted to tomato plant during the flowering and fruiting stages (Pavunraj et al, 2021). Tomato fruitborer lays eggs on tomato leaves and soon after hatching the first instar larva feeds on tomato foliage.…”

Section: Introductionmentioning

confidence: 99%

ANTIBIOSIS AND ANTIXENOSIS IN TOMATO GENOTYPES AGAINST Helicoverpa armigera HUBNER

Omotoso,

Alabi,

Akinbuluma

et al. 2024

Trop Subtrop Agroecosyst

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Background. Farmers rely on the use of synthetic insecticides in managing Helicoverpa armigera, hole-boring insect pest on tomato, but they are detrimental to human health. Therefore a more reliable and ecofriendly control measure is needed such as host plant resistance. Objective. To assess the mechanisms of resistance in tomato varieties: NGB00724, NGB00724, Anaya, Kelvin, Mona, Roma VF (susceptible varieties), Tropimech and UC82B in laboratory and screen house. Methodology. Second larval instars were fed with leaves of the different tomato varieties and their development was observed till adult stage. Study was done in the screen house where number of larvae and eggs were also observed. Larval period and weight, and percentage adult emergence were assessed in tomato varieties. Metabolites (phenol, flavonoids, terpenoids, protein, reducing sugars and total sugars) in tomato leaves were determined following standard procedures. Results. Helicoverpa armigera fed with tomato leaves, Anaya recorded the lowest larval period (9.67 days). Also, larvae fed on Anaya and Mona had the lowest larval weight (0.19 g and 0.25 g). Also significantly lower percentage of adult emergence was observed on Anaya and Mona (16.7%) Mona, NGB00725 and Anaya significantly harbored the lower number of Helicoverpa armigera adult (0.1, 0.4, 0.4). The lowest number of eggs (0.5) was recorded from adults placed on Anaya variety. There was high and negative significant correlation of r = -0.865 between phenols and adult emergence. Phenols and oviposition were significantly negatively correlated (r = -0.816). Implication. Anaya and Mona hinder the development of Helicoverpa armigera larvae when fed on it. Phenol has negative impact on the development and oviposition of Helicoverpa armigera. Conclusion. It was revealed through this study that availability of promising resistant varieties can effectively combat the damage caused by Helicoverpa armigera and lessen the shortcomings related with the application of conventional chemical insecticides in tomato production.

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Section: Introductionmentioning

confidence: 99%

ANTIBIOSIS AND ANTIXENOSIS IN TOMATO GENOTYPES AGAINST Helicoverpa armigera HUBNER

Omotoso,

Alabi,

Akinbuluma

et al. 2024

Trop Subtrop Agroecosyst

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Molecular docking studies of natural alkaloids as acetylcholinesterase (AChE1) inhibitors in Aedes aegypti

Balachandran¹,

Anbalagan²,

Kandeepan³

et al. 2021

Journal of Asia-Pacific Entomology

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The complete chloroplast genome sequence of Melochia corchorifolia Linnaeus, 1753 (Sterculiaceae)

Wang,

Wang

2024

Mitochondrial DNA Part B

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Melochia corchorifolia Linnaeus, 1753, is a weedy tropical plant of the Sterculiaceae family and has medicinal value. We sequenced the complete chloroplast genome of M. corchorifolia using Illumina high-throughput sequencing and examined phylogenetic relationships with closely related species. The assembled chloroplast genome of M. corchorifolia was 163,693 bp long and contained a pair of inverted repeats of 29,729 bp, separated by a large single-copy sequence of 84,350 bp and a small single-copy region of 19,885 bp. A total of 136 genes were annotated across the entire chloroplast genome, including 37 transfer RNA, 8 ribosomal RNA, and 91 protein-coding genes. The GC content of the complete cp genome was 37.27%. The phylogenetic tree indicated that M. corchorifolia is closely related to Melochia pyramidata (Malvaceae). These results would provide useful information for future phylogenetic, taxonomic, and evolutionary studies on Sterculiaceae and Malvaceae.

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Karyomorphological effects of two new oil formulations on Helicoverpa armigera (Hübner) (Lepidoptera: Noctuidae)

Cited by 3 publications

References 19 publications

ANTIBIOSIS AND ANTIXENOSIS IN TOMATO GENOTYPES AGAINST Helicoverpa armigera HUBNER

ANTIBIOSIS AND ANTIXENOSIS IN TOMATO GENOTYPES AGAINST Helicoverpa armigera HUBNER

Molecular docking studies of natural alkaloids as acetylcholinesterase (AChE1) inhibitors in Aedes aegypti

The complete chloroplast genome sequence of Melochia corchorifolia Linnaeus, 1753 (Sterculiaceae)

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