Abstract
The mechanisms adopted to ensure mating success, fertility and fecundity ofS. littoralis were studied. The male moths usually mate only once a night but they mate repeatedly during most of their life span, and practically all their spermatophores are equally efficient for inseminating a female. Although females are also multiple maters, one spermatophore is sufficient for a female to lay fertile eggs throughout her life with no reduction in potential fecundity. While a male may mate 5.3 times, on the average, a female may mate only 2.3 times. As a pronounced decrease in pheromone release occurs after mating, a repeat mating by a female will occur only after most neighboring competitive virgin females have been inseminated. A male may mate therefore with 5.3 different females, all of which will be thoroughly inseminated.
The female moth is ready to mate just after emergence and at any time throughout her life. If mating is delayed the preoviposition period is greatly prolonged and eggs are saved to be laid later, after mating, as fertile eggs. Delay in egg laying due to delayed insemination does not result in reduced fecundity as it is compensated for by prolonged longevity. Even if mating is greatly delayed and occurs after egg laying has already begun, the potential reduction in reproduction is not very great, due to the low daily egg-laying rate and the increased longevity of unmated females.
It appears unreasonable to expect any tendency toward reduction of egg production with a decrease in the ratio of adult males in a population; for this purpose the control of males must be essentially complete. Therefore, a behavioral control program by mass trapping ofS. littoralis males is unlikely to be economically feasible.
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References
Abdel-Salam, F.A., Elbadry, E.A., Abo-Elghar, M.R., Hassan, S.M. andAsel, M.A. (1971) The effect of four host plants on the pupal development and adult fecundity of the cotton leafwormSpodoptera littoralis (Boisd.).Z. angew. Ent. 68: 326–330.
Avidov, Z. andHarpaz, I. (1969) Plant Pests of Israel. Israel Universities Press, Jerusalem.
Bishara, I. (1934) The cotton wormProdenia litura F. in Egypt.Bull. Soc. R. Ent. Egypte 18: 228–404.
Campion, D.G. (1972) Some observations on the use of pheromone traps as a survey tool forSpodoptera littoralis. Misc. Rep. Centre Overseas Pest Res. 4.
Campion, D.G. (1974) The use of sex pheromones in the control ofSpodoptera littoralis Boisd.EPPO Bull. 4: 357–362.
Campion, D.G., Bettany, B.W., Nesbitt, B.F., Beevor, P.S., Lester, R. andPoppi, R.G. (1974) Field studies of the female sex pheromone of the cotton leaf wormSpodoptera littoralis (Boisd.) in Cyprus.Bull. ent. Res. 64: 89–96.
Dimetry, N.Z. (1972) Further studies on the host plant preference ofSpodoptera littoralis Boisd. (Lep. Noctuidae).Z. angew. Ent. 71: 350–355.
El-Minshawy, A.M. andZeid, M. (1972) Rearing the larvae of the cotton leaf wormSpodoptera littoralis (Boisd.) on semi-artificial diet.Z. angew. Ent. 70: 101–104.
Jarczyk, H.J. andHertle, P. (1959) Contribution to the biology and biochemistry of the cotton leaf-worm,Prodenia litura F. (Noctuidae). IV. Further investigations on the prepupal and pupal stages and on the emergence of female and male moths.Z. angew. Ent. 45: 94–102.
Jarczyk, H.J. andHertle, P. (1960) Contribution to the biology and biochemistry of the cotton leaf-worm,Prodenia litura F. (Noctuidae). V. Studies on the mating capacity of female and male moths.Z. angew. Ent. 45: 304–312.
Jarczyk, H.J., Jarczyk, M. andFlaschentraeger, B. (1957) Contribution to the biology and biochemistry of the cotton leaf-worm,Prodenia litura F. I. Investigations on the duration of the pupal stage and on the emergence and its relation to the daytime of the female and male moths.Bull. Soc. Ent. Egypte 41: 621–626.
Kehat, M., Genizi, A. andGreenberg, S. (1975) The use of traps baited with live females or synthetic pheromone as a tool for improving control programs of the cotton leaf-worm,Spodoptera littoralis (Boisd.), in cotton fields in Israel.Phytoparasitica 3: 3–18.
Khalifa, A., Salama, H.S. andEl-Sharaby, A.F. (1973) Rearing the cotton leaf-wormSpodoptera littoralis Boisd. on a semiartificial diet.Z. angew. Ent. 73: 129–132.
Moussa, M.A. andNasr, E.S.A. (1960) Factors affecting longevity and reproductive potentials of moths of the cotton leaf-wormProdenia litura.Bull. Soc. Ent. Egypte 44: 383–386.
Otake, A. andOyama, M. (1973) Influence of sex ratio and density on the mating success ofSpodoptera litura F. (Lepidoptera: Noctuidae).Appl. Ent. Zool. 8: 246–247.
Otake, A. andSakuratani, Y. (1972) Egg production of the adult tobacco cutwormSpodoptera litura F. (Lepidoptera: Noctuidae) under different sex ratios and population processes of the larvae.Appl. Ent. Zool. 7: 190–198.
Oyama, M. (1972) [Duration and frequency of mating of the tobacco cutworm,Spodoptera litura F. (Lepidoptera: Noctuidae), and trapping of the mating-ascertained males with the virgin females.Proc. Ass. Pl. Prot. Sikako 7: 63–68. (in Japanese)
Rivnay, E. andMeisner, J. (1966) The effects of rearing conditions on the immature stages and adults ofSpodoptera littoralis (Boisd.).Bull. ent. Res. 56: 623–634.
Salama, H.S., Dimetry, N.Z. andSalem, S.A. (1971) On the host preference and biology of the cotton leafwormSpodoptera littoralis Boisd.Z. angew. Ent. 67: 261–266.
Salama, H.S. andSalem, S.A. (1971) Biology ofSpodoptera littoralis Boisd. as affected by larval density (Lep. Noctuidae).Z. angew. Ent. 67: 141–143.
Shorey, H.H. (1970) Sex pheromones of Lepidoptera.in: Control of Insect Behavior by Natural Products. D.L. Wood, R.M. Silverstein and M. Nakajima, Eds. pp. 249–284. Academic Press, New York.
Shorey, H.H. (1974) Environmental and physiological control of insect sex pheromone behavior.in: Pheromones. M.C. Birch, Ed. pp. 62–80. North Holland Publ. Co., Amsterdam.
Shorey, H.H. andHale, R.L. (1965) Mass rearing of nine noctuid species on a simple artificial medium.J. econ. Ent. 58: 522–524.
Wiesmann, R. (1957) Untersuchungen über die sexualbiologie vonProdenia litura F. in Agypten.Z. Pflanzenkrankh 64: 554–562.
Willcocks, F.C. andBahgat Said (1937) The insects and related pests of Egypt. 1(2). Roy. Agric. Soc., Cairo.
Yushima, T., Noguchi, H., Tamaki, Y., Fukayawa, N. andSugino, T. (1973) Mating and sex pheromone ofSpodoptera litura F. (Lepidoptera: Noctuidae): An introductory report.Appl. Ent. Zool. 8: 18–26.
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Publication of the Agricultural Research Organization
No. 301-E, 1975 series.
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Kehat, M., Gordon, D. Mating, longevity, fertility and fecundity of the cotton leaf-worm,Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae). Phytoparasitica 3, 87–102 (1975). https://doi.org/10.1007/BF03158291
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DOI: https://doi.org/10.1007/BF03158291