Summary
Feeding of Styropor lamellae treated with 0.25 M maltose, sucrose, raffinose or melezitose byS. littoralis larvae induced amylase activity to 5–6 fold and invertase and protease activity to 2–3 that of the control. Melibiose induced amylase activity to about 4-fold and invertase and protease activity to 188% and 173%, respectively, that of the control. β-lactose stimulated the various digestive enzymes to various extents; cellobiose had practically no effect. Glucose and fructose induced the various digestive enzymes to about the same level but to a much higher extent than galactose.
The feeding rate of the various sugar compounds except maltose, correlates well with their stimulating activity on the digestive enzymes. Maltose, which induced the larval digestive enzymes to about the same level as that of sucrose, elicited a considerably lower feeding response. The excretion index of sugars stimulating digestive enzymes and eliciting a feeding response, such as maltose, sucrose, raffinose and melezitose, is considerably lower than that of the other sugars.
In a comparative test, sucrose, maltose and raffinose induced the various digestive enzymes to about the same level as their equivalent monosaccharide components. However, β-lactose and cellobiose, which have the same components as melibiose and maltose but differ in their configuration, affect the various enzymatic systems weakly.
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Ascher, K. R. S., Meisner, J.: Evaluation of the “Styropor method” for the assay of phagostimulants for the larva of a phytophagous insect,Spodoptera littoralis, under various experimental conditions. Entomologia exp. appl.16, 101–114 (1973).
Ascher, K. R. S., Moscowitz, J.: The ovicidal effect of chlorphenamidine (Fundal) and chlorphenamidine-formetanate (Fundal forte) in the Egyptian cotton leaf- worm,Spodoptem littoralis Boisd. Z. angew. Ent.67, 34–38 (1970)
Augustine, M. G., Fisk, F. W., Davidson, R. H., Lapidus, J. B., Oleary, R. W.: Host-plant selection by the Mexican bean beetle,Epilachna varivestis. Ann. ent. Soc. Am.57, 127–134 (1964)
Davis, G. R. F.: Phagostimulation and consideration of its role in artificial diets. Bull. ent. Soc. Am.14, 27–30 (1968)
Dethier, V. G.: Chemoreception. In: Insect physiology, ed. by Roeder K. D., p. 544–576. New York: John Wiley 1953
Galun, R., Fraenkel, G.: Physiological effects of carbohydrates in the nutrition of a mosquito,Aedes aegypti and two flies,Sarcophaga bullata andMusca domestica. J. cell. comp. Physiol.50, 1–23 (1957)
Hsiao, T. H., Fraenkel, G.: The influence of nutrient chemicals on the feeding behavior of the Colorado beetle,Leptinotarsa decemlineata (Coleoptera: Chrysomelidae). Ann. ent. Soc. Am.61, 44–54 (1968)
Ishaaya, I., Moore, I., Joseph, D.: Protease and amylase activity in larvae of the Egyptian cotton worm,Spodoptera littoralis. J. Insect Physiol.17, 945–953 (1971)
Ishaaya, I., Swirski, E.: Invertase and amylase activity in the armoured scalesChrysomphalus aonidum andAonidiella aurantii. J. Insect Physiol.16, 1599–1606 (1970)
Ito, T.: Effect of sugars on feeding of larvae of the silkworm,Bombyx mori. J. Insect Physiol.5, 95–107 (1960)
Lapidus, J. B., Cleary, R. W., Davidson, R. H., Fisk, F. W., Augustine, M. G.: Chemical factors influencing host selection by the Mexican bean beetleEpilachna varivestis Muls. J. agric. Fd Chem.11, 462–463 (1963)
Meisner, J., Ascher, K. R. S., Flowers, H. M.: The feeding response of the larva of the Egyptian cotton leafworm,Spodoptera littoralis Boisd., to sugars and related compounds. I. Phagostimulatory and deterrent effects. Comp. Biochem. Physiol.42A, 899–914 (1972)
Meisner, J., Flowers, H. M., Ascher, K. R. S., Ishaaya, I.: The feeding response of the larva of the Egyptian cotton leafworm,Spodoptera littoralis Boisd., to sugars and related compounds. III. Biochemical and enzymological aspects of sucrose consumption. Comp. Biochem. Physiol.44A, 793–806 (1972a)
Noelting, G., Bernfeld, P.: Sur les enzymes amylolytiques. III. La β-amylase: Dosage d'activité et controle de l'absence d'α-amylase. Helv. chim. Acta31, 286–290 (1948)
Pielou, D. P., Glaser, R. F.: Survival ofMaerocentrus ancylivorus Roh., a parasite of the oriental fruit moth, on different concentrations of various sugar solutions. Canad. J. Zool.31, 121–124 (1953)
Schoonhoven, L. M.: Chemosensory bases of host plant selection. A. Rev. Ent.13, 115–136 (1968)
Thorsteinson, A. J.: Host selection in phytophagous insects. A. Rev. Ent.5, 193–218 (1960)
Yamamoto, R. T., Fraenkel, G. S.: Assay of the principal gustatory stimulant for the tobacco hornworm,Protoparce sexta, from solanaceous plants. Ann. ent. Soc. Am.53, 499–503 (1960)
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Contribution from The Volcani Center, Agricultural Research Organization, Bet Dagan, Israel. 1972 Series, No. 2171-E.
Definitions. Feeding response: express the intake of sugar plus insert Styropor carrier. Excretion index: ratio between weight of fecal pellets and Styropor lamellae consumed.
The authors wish to thank Mr. K. R. S. Ascher for fruitful discussions, Dr. A. Genizi for statistical analysis of the results, Mrs. Sara Yablonski and Mrs. Shulamit Cohen for skillful technical assistance, and Mrs. Shoshana Hadad for insect rearing.
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Ishaaya, I., Meisner, J. Physiological effect of sugars on various digestive enzymes ofSpodoptera littoralis larvae. J. Comp. Physiol. 86, 117–124 (1973). https://doi.org/10.1007/BF00702532
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DOI: https://doi.org/10.1007/BF00702532