Black Vine Weevil (Coleoptera: Curculionidae) Feeding and Oviposition on Leaves of Weevil-resistant and -susceptible Strawberry Clones Presented in Various Quantities

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Abstract
Adult black vine weevils, Otiorhynchus sulcatus (F.), were fed ‘Totem’ strawberry or clone CL-5 of the wild beach strawberry, Fragarta chiloensis (L.) Duchesne weekly for 14 weeks after eclosion. Amounts of leaf provided were varied to give a food supply ranging from insufficient to abundant. In general, amount of leaf eaten increased, preoviposition period decreased, and number of eggs laid increased as leaf disk size increased. With equal food supply, feeding was less, preoviposition period was longer, and oviposition was less on CL-5 than on ‘Totem’. This indicated that resistance is due in part to less feeding on CL-5 than on ‘Totem’. However, preoviposition period was longer and fewer eggs were laid on CL-5 than on ‘Totem’ even when daily food intake was equal, indicating that factors in addition to antixenosis are involved in resistance of CL-5 to adult black vine weevil.

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