Feeding preferences ofSpodoptera exiguain response to form and concentration of selenium

Protection of rice against Nilaparvata lugens by direct toxicity of sodium selenate

“…After uptake by the plant, sodium selenate (Na 2 SeO 4 ) is reduced to sodium selenite (Na 2 SeO 3 ) and may subsequently be metabolized into organic forms using selenium as a sulfur substitute in amino acid analogs such as selenocysteine, selenocystine and selenomethionine (Cutter, 1992;Presser, Sylvester, & Low, 1994;Terry & Zayed, 1994). These different forms of selenium can have different toxicity towards insects (Vickerman & Tumble, 1999). Consequently, it is possible that the sodium selenate in the treated rice plants is converted to other forms of selenium and that these forms cause higher toxicity towards BPH compared to sodium selenate.…”

Protection of rice against Nilaparvata lugens by direct toxicity of sodium selenate

“…After uptake by the plant, sodium selenate (Na 2 SeO 4 ) is reduced to sodium selenite (Na 2 SeO 3 ) and may subsequently be metabolized into organic forms using selenium as a sulfur substitute in amino acid analogs such as selenocysteine, selenocystine and selenomethionine (Cutter, 1992;Presser, Sylvester, & Low, 1994;Terry & Zayed, 1994). These different forms of selenium can have different toxicity towards insects (Vickerman & Tumble, 1999). Consequently, it is possible that the sodium selenate in the treated rice plants is converted to other forms of selenium and that these forms cause higher toxicity towards BPH compared to sodium selenate.…”

Selenium: The Toxicant for Pathogen and Pest but the Guardian of Soil and Crop

“…Compared to Se-free diets, only 20% of the larvae chose to consume diets containing Na 2 SeO 3 , with the feeding ratio decreasing as Se concentrations increased. 142 Interestingly, Spodoptera exigua did not exhibit the same avoidance behavior toward diets containing organic forms of Se, such as SeMet and SeCys, as they did with inorganic Se. 143 This difference in behavior may be attributed to how insects detect and respond to various chemical forms of Se.…”

Recent advances in the role of selenium and nanoselenium in modulating plant defense under biotic and abiotic stresses

“…Both inorganic (selenate and selenite) and organic (selenomethionine and selenocysteine) forms exhibit variable toxicity across different insect taxa ( Scheys et al., 2020 ; So et al., 2023 ). It has been demonstrated that a Se-enriched diet alters plant selection and feeding behavior, acting as an antifeedant for larvae of Spodoptera exigua ( Trumble et al., 1998 ; Vickerman and Trumble, 1999 ). Similarly, inorganic Se showed stronger antifeedant effects than organic Se compounds against late-instar larvae of S. exigua ( Vickerman et al., 2002 ).…”

Protection of rice against Nilaparvata lugens by direct toxicity of sodium selenate

“…After uptake by the plant, sodium selenate (Na 2 SeO 4 ) is reduced to sodium selenite (Na 2 SeO 3 ) and may subsequently be metabolized into organic forms using selenium as a sulfur substitute in amino acid analogs such as selenocysteine, selenocystine and selenomethionine (Cutter, 1992;Presser, Sylvester, & Low, 1994;Terry & Zayed, 1994). These different forms of selenium can have different toxicity towards insects (Vickerman & Tumble, 1999). Consequently, it is possible that the sodium selenate in the treated rice plants is converted to other forms of selenium and that these forms cause higher toxicity towards BPH compared to sodium selenate.…”

Selenium: The Toxicant for Pathogen and Pest but the Guardian of Soil and Crop

“…Compared to Se-free diets, only 20% of the larvae chose to consume diets containing Na 2 SeO 3 , with the feeding ratio decreasing as Se concentrations increased. 142 Interestingly, Spodoptera exigua did not exhibit the same avoidance behavior toward diets containing organic forms of Se, such as SeMet and SeCys, as they did with inorganic Se. 143 This difference in behavior may be attributed to how insects detect and respond to various chemical forms of Se.…”

Recent advances in the role of selenium and nanoselenium in modulating plant defense under biotic and abiotic stresses

“…Both inorganic (selenate and selenite) and organic (selenomethionine and selenocysteine) forms exhibit variable toxicity across different insect taxa ( Scheys et al., 2020 ; So et al., 2023 ). It has been demonstrated that a Se-enriched diet alters plant selection and feeding behavior, acting as an antifeedant for larvae of Spodoptera exigua ( Trumble et al., 1998 ; Vickerman and Trumble, 1999 ). Similarly, inorganic Se showed stronger antifeedant effects than organic Se compounds against late-instar larvae of S. exigua ( Vickerman et al., 2002 ).…”

Protection of rice against Nilaparvata lugens by direct toxicity of sodium selenate

“…After uptake by the plant, sodium selenate (Na 2 SeO 4 ) is reduced to sodium selenite (Na 2 SeO 3 ) and may subsequently be metabolized into organic forms using selenium as a sulfur substitute in amino acid analogs such as selenocysteine, selenocystine and selenomethionine (Cutter, 1992;Presser, Sylvester, & Low, 1994;Terry & Zayed, 1994). These different forms of selenium can have different toxicity towards insects (Vickerman & Tumble, 1999). Consequently, it is possible that the sodium selenate in the treated rice plants is converted to other forms of selenium and that these forms cause higher toxicity towards BPH compared to sodium selenate.…”

Selenium: The Toxicant for Pathogen and Pest but the Guardian of Soil and Crop

“…Compared to Se-free diets, only 20% of the larvae chose to consume diets containing Na 2 SeO 3 , with the feeding ratio decreasing as Se concentrations increased. 142 Interestingly, Spodoptera exigua did not exhibit the same avoidance behavior toward diets containing organic forms of Se, such as SeMet and SeCys, as they did with inorganic Se. 143 This difference in behavior may be attributed to how insects detect and respond to various chemical forms of Se.…”

Recent advances in the role of selenium and nanoselenium in modulating plant defense under biotic and abiotic stresses

“…Both inorganic (selenate and selenite) and organic (selenomethionine and selenocysteine) forms exhibit variable toxicity across different insect taxa ( Scheys et al., 2020 ; So et al., 2023 ). It has been demonstrated that a Se-enriched diet alters plant selection and feeding behavior, acting as an antifeedant for larvae of Spodoptera exigua ( Trumble et al., 1998 ; Vickerman and Trumble, 1999 ). Similarly, inorganic Se showed stronger antifeedant effects than organic Se compounds against late-instar larvae of S. exigua ( Vickerman et al., 2002 ).…”