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- W974196444 abstract "This study investigates the interspecific interactions between three biological control agents of Echium plantagineum L. (Paterson’s curse; Boraginaceae): Mogulones larvatus Schultze, M. geographicus Goeze (Coleoptera: Curculionidae) and Longitarsus echii (Koch) (Coleoptera: Chrysomelidae). Previous research has suggested that the two Mogulones species do not interfere with each other in the same plant. However, it is not known how L. echii might affect or be affected by M. geographicus and M. larvatus. Furthermore, the effect of the agents in combination on the host plant has not been evaluated. In a glasshouse experiment, the impact of larvae from three different species on each other and on the host plant was evaluated. Plants were inoculated with larvae of the insects in one of the following combinations, no insects (control), M. geographicus alone, M. larvatus alone, L. echii alone, M. geographicus and M. larvatus, M. geographicus and L. echii or M. larvatus and L. echii. After seven weeks the mass of surviving larvae was measured. Various measurements of plant growth and reproduction were also taken. The average larval mass of L. echii decreased when attacking the same plant as either of the Mogulones species. Survival of M. larvatus was marginally reduced in the presence of L. echii. Plants with M. geographicus alone or with L. echii had reduced flower production and greater tap root mass and secondary root mass than the control, suggesting differential resource allocation. The results suggest that it is better to release M. geographicus and M. larvatus in combination because they will not affect each other’s establishment or performance. M. geographicus may have a greater impact on the plant. Releases of L. echii should be made in areas where the other two agents are not established." @default.
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- W974196444 date "2008-01-01" @default.
- W974196444 modified "2023-09-23" @default.
- W974196444 title "Interactions between three weed biological control agents of Paterson's curse, Echium plantagineum." @default.
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