Oviposition by the weevil Cyrtobagous salviniae Calder and Sands when its host plant, Salvinia molesta is damaged
1988
Forno, I.W. (Commonwealth Scientific Industrial Research Organization, Indooroopilly (Australia). Div. of Entomology) | Bourne, A.S.
Female Cyrtobagous salviniae Calder and Sands laid fewer eggs on Salvinia molesta plants damaged by the weevil, C. salviniae or by larvae of the moth, Samea multiplicalis Guenee than on undamaged plants. The rate of oviposition was dependent on the number of buds available for adult feeding and the nitrogen content of the buds. Females did not discriminate between damaged and undamaged portions of the same plant when ovipositing. However, in undamaged regrowth which had thin rhizomes, most eggs were laid in the buds whereas in damaged growth, most eggs were laid in the thicker rhizomes where larval development occurs
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