Host instar susceptibility and stage specific predatory potential  of stink bug Eocanthecona furcellata on  tasar silkworm Antheraea mylitta

Gadad, H.; Bhagat, A.; Naqvi, A.H.; Kutala, S.

doi:10.22438/jeb/43/5/mrn-4015

Cited by 3 publications

(3 citation statements)

References 4 publications

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“…2b). However, the leaves of the latter displayed increase in toughness upon maturity, which is an A. mylitta are also reported to be more vulnerable to predator attacks by Gadad et al (2022). Late instars of B. mori and other herbivores can chew tough, mature leaves due to well-developed mouth parts (Despland, 2018;Quraiza et al, 2021).…”

Section: In-vitro Assays To Determine Protease Inhibitory Activity In...mentioning

confidence: 99%

Temporal variability in foliar protein content and trypsin inhibitory levels in two host trees of tropical Tasar silkworm Antheraea mylitta, Drury

Bhardwaj¹,

Choudhary²,

Alam³

et al. 2023

JEB

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Aim: Variation in total soluble proteins and protease inhibitor levels were investigated to determine nutritional and plant defense status in different leaf types of Terminalia arjuna (Roxb.) Wight and Arn., and Schleichera oleosa (Lou.) Oken, two host tree species of the economically important, non-mulberry Tasar silkworm, A. mylitta. Methodology: Quantitative spectrophotometric assays based on diagnostic amidolytic substrates were conducted to assess serine protease inhibitor activities in young, semi-mature and mature leaf types. A microplate quantification assay for total protein estimations was used with leaf types sampled over a year. Efficacy of total trypsin inhibitor and chymotrypsin inhibitor activities detected in T. arjuna (a primary host plant) was further evaluated on gut extracts of fourth instar A. mylitta and Pieris brassicae L. (a Pierid pest of crucifers) to assess the physiological adaptation of larvae to dietary antifeedants. Molecular provenances with rbcL genes were obtained that are available as NCBI accessions #MN460810 for T. arjuna and #MT010554 for S. oleosa. Results: Intra-specific variations were evident in leaf phenology of two tree species. Generally, young leaf type of both tree species had high levels of total protein and trypsin inhibitory activities, while mature leaf type of T. arjuna had low total protein content and trypsin inhibitor levels. Mature leaf type of S. oleosa had low trypsin inhibitor levels during the months of July and August. Midgut proteases of A. mylitta and P. brassicae were significantly more susceptible (p≤0.05) to both trypsin and chymotrypsin inhibitors detected in young and semi-mature leaf types of T. arjuna than the mature leaf type. Interpretation: In this study, differential inhibition of digestive proteases in A. mylitta and P. brassicae by protease inhibitors from different leaf types of T. arjuna, suggested adaptation to dietary antifeedants. Such reports on nutritional quality, foliar antifeedants, phenology and host plant utilization are relevant for strategies to domesticate the tropical Tasar silkworm, A. mylitta. Key words: Antheraea mylitta, Protease Inhibitors, Terminalia arjuna, Total protein, Tree phenology

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Section: In-vitro Assays To Determine Protease Inhibitory Activity In...mentioning

confidence: 99%

Temporal variability in foliar protein content and trypsin inhibitory levels in two host trees of tropical Tasar silkworm Antheraea mylitta, Drury

Bhardwaj¹,

Choudhary²,

Alam³

et al. 2023

JEB

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“…Xanthopimpla predator is a noted parasitoid of Anthereae mylitta with a crop loss of 35-40 th %. X. pedator begins its life cycle in late 5 instar spinning larva of A. mylitta from the time of hammock formation to early cocooning stage and uses its long ovipositor to drill through silky envelope of spinning larva and deposits single egg in the abdominal segment th th preferably 5 to 7 day of cocoon spinning (Marepally, 2016;Aruna et al, 2014;Bhatia and Yousuf, 2013;Gadad et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Mechanism of adult emergence in Xanthopimpla pedator (Fabricius)- a major pupal parasitoid of Tasar silkworm

Gadad¹,

Prabhu²,

Bhagat³

et al. 2023

JEB

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Aim: The study was conducted to elucidate the mechanism involved in adult emergence behavior of Xanthopimpla pedator a pupal parasitoid of tasar silkworm. Methodology: Behavioral observations were made to study the mechanical approaches used during emergence and SDS-PAGE analysis was carried to know the possibility of proteases in the digestive secretions. Results: The findings of the study suggest that X. pedator uses physical and chemical to achieve safe passage from the host pupae and cocoons. It was observed that during the process of emergence, X. pedator breaks host pupae by means of mandibular action (by biting the pupal shell). Further, it was noticed that to make emergence hole on host cocoon X. pedator found to employ digestive secretion to soften and disintegrate the silken shell, besides it also deploys mandibles to spread out the secretion on intended place of exit hole. SDS-PAGE analysis showed the presence of series of enzymes, possibly involved in cocoon softening. Interpretation: Findings of this study forms the basis that X. pedator, a major pupal parasitoid of tasar silkworm, uses both physical and chemical approaches to achieve safe passage from the host pupae and protective silken cocoon. Key words: Digestive secretion, Mandibular action, Parasitization, Xanthopimpla pedator

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“…Tasar and Muga are reared in outdoors/natural condtions (tree based rearings without any controlled condition like Mulberry and Eri) and had chances to crop losses by sudden climate and pest outbreaks (Gadad et al, 2022), otherwise investment for enterprise is always low as compared to Mulberry and Eri silkworm rearing. Besides, it is a nature-cum family friendly farming under the concept of eco-economical life cycle assessment (LCA).…”

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confidence: 99%

Comparative economics of vanya with mulberry cocoon production in India

Manjunatha¹,

Sangannavar²,

Halagundegowda³

et al. 2023

JEB

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Aim: To compare the remunerativeness of Mulberry, Tasar, Eri and Muga based sericulture enterprises. Methodology: An empirical analysis was undertaken to compare the economics of mulberry and non-mulberry cocoon production in India, utilizing the available data from Central Silk Board using descriptive statistics and suitable ratios. Results: The study indicated that returns per rupee of investment in Mulberry (1.66), Tasar (1.60), Eri (1.88) and Muga (2.07) were higher compared to agriculture crop enterprises (National Silk Policy-2020), besides being of short duration with frequent assured income at least for three to six times in a year. Interpretation: The Mulberry and Eri silkworm cocoon production is highly remunerative enterprise and attracts the youths, because of its domesticated nature, short duration and women friendly enterprise. Key words: Cocoon production, Economics, Eco-friendly, Mulberry, Sericulture enterprises, Vanya

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Host instar susceptibility and stage specific predatory potential of stink bug Eocanthecona furcellata on tasar silkworm Antheraea mylitta

Cited by 3 publications

References 4 publications

Temporal variability in foliar protein content and trypsin inhibitory levels in two host trees of tropical Tasar silkworm Antheraea mylitta, Drury

Temporal variability in foliar protein content and trypsin inhibitory levels in two host trees of tropical Tasar silkworm Antheraea mylitta, Drury

Mechanism of adult emergence in Xanthopimpla pedator (Fabricius)- a major pupal parasitoid of Tasar silkworm

Comparative economics of vanya with mulberry cocoon production in India

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