Trace element nutrition of the silkwormBombyx mori L.

Sridhara, S.; Bhat, Jayashree S.

doi:10.1007/bf03052022

Cited by 4 publications

(1 citation statement)

References 8 publications

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“…7). Sridhara and Bhat (1966) and Sell and Schmidt (1968) also recorded developmental abnormalities and inhibition of pupation in the cabbage looper Trichoplusia ni (Hubner) when larvae were fed a diet mixed with 500 mg/kg chelatex Zn. This research revealed that coexposure to zinc and iron reduces paraquat herbicide toxicity at sublethal levels, which may be viewed as a signi cant turning point in agroecosystems and pest management.…”

Section: Low Concentrations Ofmentioning

confidence: 99%

Sublethal co-exposure of zinc and iron mitigates paraquat herbicide toxicity affecting the physiological responses of Egyptian cotton leafworm Spodoptera littoralis

Shaik

Mishra

2023

Preprint

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Metals and herbicides present in the environment affect the vital functions of insect pests, including their development, tolerance, resistance, and survival. Such metal-herbicide interactions will have inevitable, but complicated effects on insects, which remains poorly understood. Here, the interaction of zinc (Zn), iron (Fe), and paraquat (PQ) at subleathal dose on the physiological responses of the Egyptian cotton leafworm Spodoptera littoralis was examined. Co-exposure of Zn/ Fe enhanced the survival of leafworms (10 to 20 mg 100%; 40 mg 85%) compared to separate exposure. Low exposure to Zn/Fe/PQ had the lowest toxicity, possibly because metal complexes have efficient chelating activity, allowing the leafworm to survive longer. Low exposure to Zn, Fe, and Zn/Fe increased food intake and larval weight significantly, and affected frass production. PQ alone hindered feeding, enhanced frass production, and reduced larval weight. In contrast, Zn/Fe and PQ/Zn alleviated toxic effects. Interestingly, Zn/Fe/PQ combined increased larval and pupal weight in surviving individuals. Larval mortality was highest with high doses of PQ (40 mg) and in metal co-exposure diets, with no larvae reaching the pupal stage. Zn/Fe appeared to be essential for the ecdysis of larvae to pupae, with lower larval mortality and extended pupal ecdysis (% days). This study demonstrated the realistic conditions of Zn and Fe interactions with PQ, providing important information regarding physiological toxicity and pest management. Tests on haemolymph-bacteria of S. littoralis using disc diffusion method revealed significant differences with Zn, Zn/Fe, Zn/Fe/PQ, stating their interaction might play a crucial immunomodulatory role in S. littoralis.

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Section: Low Concentrations Ofmentioning

confidence: 99%

Sublethal co-exposure of zinc and iron mitigates paraquat herbicide toxicity affecting the physiological responses of Egyptian cotton leafworm Spodoptera littoralis

Shaik

Mishra

2023

Preprint

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Trace element nutrition of the silkwormBombyx mori L

Sridhara

Bhat

1966

Proceedings of the Indian Academy of Sciences - Section B

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Effect of Zinc Sulphate on the Feeding and Growth of Spodoptera littoralis Boisd.

Salama

Sharaby

1972

Zeitschrift für Angewandte Entomologie

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Zinc sulphate has a deterrent feeding effect to the larvae of Spodoptera littoralis, when supplemented with its diet at concentrations of 0.1 M or higher. This caused a lower rate of food intake. As a result, the development and growth of the larvae were retarded when reared on diets supplemented with this salt. Data on the weight of the larvae, their length and width of their head capsules confirmed this view. The accumulation of zinc in the tissues of the larvae seems to be the factor leading to the induction of sterility in the emerged moths. Zusammenfassung Zur Wirkung von Zink‐Sulphat auf den Fraß und das Wachstum von Spodoptera littoralis Boisd. Zink‐Sulphat hat einen fraßabschreckenden Effekt auf die Raupen von S. littoralis bei Konzentrationen von 0,1 M und höher. Es verursacht eine Fraßminderung und eine Verzögernug der Entwicklung. Gewichts‐ und Kopfkapselmessungen an den Raupen belegen diesen Effekt. Das Zink scheint sich in den Larvalgeweben zu akkumulieren und schließlich zur Sterilisation der geschlüpften Falter zu führen.

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Trace element nutrition of the silkwormBombyx mori L.

Cited by 4 publications

References 8 publications

Sublethal co-exposure of zinc and iron mitigates paraquat herbicide toxicity affecting the physiological responses of Egyptian cotton leafworm Spodoptera littoralis

Sublethal co-exposure of zinc and iron mitigates paraquat herbicide toxicity affecting the physiological responses of Egyptian cotton leafworm Spodoptera littoralis

Trace element nutrition of the silkwormBombyx mori L

Effect of Zinc Sulphate on the Feeding and Growth of Spodoptera littoralis Boisd.

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