Summary
The population growth of the green rice leafhopper,Nephotettix cincticeps, in the paddy field was analyzed based on the life table data accumulated for six years.
The paddy field population, which stems from the invading adults of the first generation (G-I), repeats two complete generations, and the hatchlings of the fourth generation (G-IV) enter diapause and overwinter as the fourth instar nymphs in fallow paddy fields. It was clarified that the density dependent reduction in the mean longevity and oviposition rate of adult females in G-II and III played a primary role in stabilizing the annual population densities. The annual average of the mean longevity of G-II females (3.9 days) was much shorter than that of G-III ones (7.7 days) and thus the density dependent reduction in the mean longevity induced a more prompt regulatory effect on the oviposition of G-II females compared with G-III ones. As the result, two equilibrium densities of eggs were obtained,e.g., ca 100 and 700 eggs per hill in G-III and IV, respectively. Density dependent decrease in the proportion of mature females in the adult population was especially conspicuous in G-II, and this was closely associated with the density dependent reduction in the mean longevity and fecundity. Thus, the density dependent dispersal (emigration) of the adult females by flight in G-II and III was the most convincing factor in the process of population regulation. The density dependent dispersal of the adult females is effective in avoiding the deleterious effects of nymphal crowding in a breeding habitat unit (a paddy field), and may result in a more even distribution of the population over a continuous habitat units in a locality than otherwise.
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References
Fukaya, S. andK. Kiritani (ed.) (1973)Integrated control. Kodan-sha Scientific (Tokyo), 415 pp. (In Japanese).
Hokyo, N. (1972) Studies on the life history and the population dynamics of the green rice leafhopper,Nephotettix cincticeps Uhler.Bull. Kyushu Agr. Expt. Sin. 16: 283–382. (In Japanese with English summary)
Hokyo, N. (1975) Population dynamics, forecasting and control of the green rice leafhopper,Nephotettix cincticeps Uhler.Rev. Plant Protec. Res. 8: 1–13.
Hokyo, N. andK. Kiritani (1967) A method for estimating natural survival rate and mean fecundity of an adult insect population by dissecting the female reproductive organs.Res. Popul. Ecol. 9: 130–142.
Hokyo, N. andE. Kuno (1970) Estimating the survival rate and mean longevity for adults in a field population of the green rice leafhopper,Nephotettix cincticeps Uhler, by the application ofKokyo andKiritani’s method.Res. Popul. Ecol. 12: 71–80.
Kiritani, K., N. Hokyo, T. Sasaba andF. Nakasuji (1970) Studies on the population dynamics of the green rice leafhopper,Nephotettix cincticeps Uhler: Regulatory mechanism of the population density.Res. Popul. Ecol. 12: 137–153.
Kisimoto, R. (1965) Studies on polymorphism and its role playing in the population growth of the brown planthopper,Nilaparvata lugens Stål.Bull. Shikoku Agr. Expt. Stn. 13: 1–106. (In Japanese with English summary)
Kobayashi, T. (1961) The effect of insecticidal applications to the rice stem borer on the leafhopper population.Special report on the forecasting of plant diseases and insect pests (MAF), No. 6: 126 pp. (In Japanese with English summary)
Kuno, E. (1963) A comparative analysis on the distribution of nymphal populations of some leaf-and planthoppers on rice plant.Res. Popul. Ecol. 5: 31–43.
Kuno, E. (1968) Studies on the population dynamics of rice leafhoppers in a paddy field.Bull. Kyushu Agr. Expt. Stn. 14: 131–246. (In Japanese with English summary)
Kuno, E. andN. Hokyo (1970a) Comparative analysis of the population dynamics of rice leafhoppers,Nephotettix cincticeps Uhler andNilaparvata lugens Stål, with special reference to natural regulation of their numbers.Res. Popul. Ecol. 12: 154–184.
Kuno, E. andN. Hokyo (1970b) Mean longevity of adults in a field population of the brown planthopper,Nilaparvata lugens Stål (Hemiptera: Delphacidae), as estimated byHokyo andKiritani’s method.Appl. Ent. Zool. 5: 225–227.
Kuno, E. andN. Hokyo (1976) Population regulation and dispersal of adults in the green rice leafhopper,Nephotettix cincticeps Uhler (Hemiptera: Deltocephalidae).Physiol. Ecol. Jap. 17: 117–123. (In Japanese with English summary)
Mochida, O. (1964) On oviposition in the brown planthopper,Nilaparvata lugens (Stål) (Hom., Auchenorryncha). 1. Oviposition and environmental factors with special reference to temperature and rice plant.Bull. Kyushu Agr. Expt. Stn. 10: 257–285.
Okubo, N. andR. Kisimoto (1971) Diurnal periodicitiy of flight behaviour of the brown planthopper,Nilaparvata lugens Stål, in the fourth and fifth emergence periods.Jap. J. Appl. Ent. Zool. 15: 8–16. (In Japanese with English summary)
Richard, O. W. andN. Waloff (1954) Studies on the biology and population dynamics of British grasshoppers.Anti-Locust Bull. 17: 1–182.
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Hokyo, N., Kuno, E. Life table studies on the paddy field population of the green rice leafhopper,Nephotettix cincticeps Uhler (Hemiptera: Cicadellidae), with special reference to the mechanism of population regulation. Res Popul Ecol 19, 107–124 (1977). https://doi.org/10.1007/BF02510943
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DOI: https://doi.org/10.1007/BF02510943