Abstract
The biology and host specificity ofSamea multiplicalis (Guenée) were studied in quarantine in Australia. Immature stages completed development onSalvinia molesta Mitchell,Pistia stratiotes L. andAzolla pinnata R.Br. In starvation tests, although larvae which had first fed onS. molesta produced minor leaf scarring on some other plants, they were unable to complete development.
Damage toS. molesta andP. stratiotes indicated thatS. multiplicalis may be a valuable biological control agent for these weeds in Australia.S. multiplicalis was first liberated in northern Queensland in 1981 where it has become established onS. molesta.
Résumé
La biologie deSamea multiplicalis Guenée et sa spécificité des hôtes ont été étudiées en quarantaine en Australie. Les stades larvaires se développent complètement surSalvinia molesta Mitchell,Pistia stratiotes L., etAzolla pinnata R. Br.. Dans des essais d'inanition, les larves qui s'étaient nourries d'abord deS. molesta ont causé des cicatrices mineures aux feuilles de quelques autres plantes, mais sans pouvoir s'y développer en adultes.
Samea multiplicalis, d'après ses dégâts àS. molesta et àP. stratiotes, pourrait servir comme agent utile dans la lutte biologique contre ces mauvaises herbes en Australie. On a libéréS. multiplicalis en 1981, au nord du Queensland, où elle s'est établie surS. molesta.
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Sands, D.P.A., Kassulke, R.C. Samea multiplicalis [Lep.: Pyralidae], for biological control of two water weeds,Salvinia molesta andPistia stratiotes in Australia. Entomophaga 29, 267–273 (1984). https://doi.org/10.1007/BF02372113
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DOI: https://doi.org/10.1007/BF02372113