Life history of the importedScymnus (Nephus) Reunioni [Col.: Coccinellidae] predator of mealybugs

BioControl - Tập 33 - Trang 101-114 - 1988
S. S. Izhevsky1, A. D. Orlinsky1
1All-Union Research Institute for Plant Quarantine GOSAGROPROM USSR, Moscow, USSR

Tóm tắt

The life history ofNephus reunioni, introduced from the Reunioni island has been studied. Optimum temperature for the development of the entomophagous insect is 24–25°C. In this case the population has the highest survival at preimaginal stages, life duration of adults and reproductive capacity. The rate of population growth was calculated by the formula: $$w = exp\frac{{In R_0 }}{T}$$ , were R0-reproduction coefficient, T-generation development time. W shows the daily increase in the predator population and is maximum at 29°C.N. reunioni is capable of successfully developing within the wide range of relative humidity. Relative humidity of 55±5% is optimum for development of the population. Due to its ecological plasticityN. reunioni can be used in biological control of mealybugs on a much greater area than the earlier introducedCryptolaemus montrouzieri (Mulsant).

Tài liệu tham khảo

Chazeau J., Etienne J. &Fürsch H. — 1974. Les Coccinellidae de l'Ile de la Réunion [Insecta, Coleoptera]. —Bull. Mus. Nat. Hist. Natur. Zool., 3 sér., N° 210, 140, 265–267. Fisher T. W. — 1963. Mass culture ofCryptolaemus andLeptomastix, natural enemies of citrus mealybugs. —Calif. Agr. Expt. Sta. Bull., N° 797, 1–38. Pianka E. R. — 1978. Evolutionary ecology. (2nd ed.) —Harper & Row, New York, Hagerstown, San-Francisco, London. Smetnik A. I. & Izhevsky S. S. — 1979. The introduction and practical application of beneficial organisms for pest control in the USSR. — In: Proceedings of the Joint American-Soviet Conference on Use of Beneficial Organisms in the Control of Crop Pests. Wash., 33–35. Williamson M. — 1972. The Analysis of Biological Populations. —Edward Arnold, University of York, London.