Eur. J. Entomol. 90 (1): 71-76, 1993
Efficiency of steinernematid nematodes (Nematoda: Steinernematidae) in controlling larvae of the black vine weevil, Otiorrhynchus sulcatus (Coleoptera: Curculionidae) in laboratory and field experiments
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Laboratory and field experiments were performed to test the ability of steinernematid nematodes to control larvae of the black vine weevil, Otiorrhynchus sulcatus, which infests rhododendrons and azaleas in Czech Republic. Of five strains tested in the laboratory the best results were achieved with the Steinernema feltiae strain Hyl isolated in Czech Republic, which provided a 100% elimination of the weevil larvae on azaleas in laboratory tests. Field tests were made in a nursery of ornamentals at Plzen-Krimice where an outbreak of the pest had lasted a long time. Preventative treatment, three releases of the nematode, was performed in three beds in successive seasons 1989-90, resulting in a 72% to 88% protection of plants in the beds, including a 52% to 77% protection in adjacent plots due to migration of nematodes from the treated areas. Only 30% of plants survived on more distant control plots. This system of control of O. sulcatus with steinernematids is a promising method of biological protection in ornamental nurseries and gardens.
Keywords: Insect pathology, biological control, Nematoda, Steinernema feltiae, Coleoptera, Curculionidae, Otiorrhynchus sulcatus
Accepted: September 28, 1992; Published: March 25, 1993 Show citation
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