Published August 16, 2021
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Fig. 2 in Control of Diaprepes abbreviatus (Coleoptera: Curculionidae) with Steinernema riobrave (Rhabditida: Steinernematidae) in plasticulture Florida strawberry
- 1. University of Florida, Gulf Coast Research and Education Center, 14625 County Road 672, Balm, Florida 33598, USA; E-mails: lahiris@ufl.edu (S. L.) & ) to the root zones of plants in a D. abbreviatus-affected area of a commercial strawberry field, less than 12% of plants were severely wilted or dead 17 d afer treatment, whereas 23% of plants in control plots were wilted or dead. In research plots, peripheral plants and a central plant in each plot were infested with 4 late-instar D. abbreviatus and treated with 1 or 2 applications of S. riobrave (25 infective juveniles per cm & ), 1 application of imidacloprid or water (control). Dead S. riobrave-infected D. abbreviatus larvae were recovered from plots to which S. riobrave was applied, but there was no effect of treatment on numbers of live larvae recovered 1, 2, and 3 wk post-application in the peripheral plants. At the end of the experiment, no live D. abbreviatus larvae were recovered from the central plants or the plants proximal to the central plants in plots treated once or twice with S. riobrave. Plant wilting and death due to larval D. abbreviatus root feeding was minimal (averages of 1-1.4 on a 1-5 rating scale) in plants proximal and distal to the central D. abbreviatus-infested plant. Treatment did not affect plant wilting and death rates in the proximal plants, but death of distal plants occurred only in control plots. Our results showed S. riobrave infected and killed late-instar D. abbreviatus in plasticulture Florida strawberry, and further research should be conducted to optimize S. riobrave applications and develop it into a management strategy for D. abbreviatus. & ) a las zonas de las raíces de las plantas en un área afectada por D. abbreviatus de un campo comercial de fresas, menos del 12% de las plantas estaban severamente marchitas o muertas 17 días después del tratamiento, mientras que el 23% de las plantas en las parcelas de control estaban marchitas o muertas. En las parcelas de investigación, se infestaron plantas periféricas y una planta central en cada parcela con larvas del 4 estadio tardíos de D. abbreviatus y se trataron con 1 o 2 aplicaciones de S. riobrave (25 juveniles infecciosos por cm & ) y 1 aplicación de imidacloprid o agua (control). Se recuperaron larvas muertas de D. abbreviatus infectadas con S. riobrave de las parcelas a las que se aplicó S. riobrave, pero no hubo efecto del tratamiento sobre el número de larvas vivas recuperadas 1, 2, y 3 semanas después de la aplicación en las plantas periféricas.Al final del experimento, no se recuperaron larvas vivas de D. abbreviatus de las plantas centrales o de las plantas próximas a las plantas centrales en parcelas tratadas una o dos veces con S. riobrave. El marchitamiento y muerte de la planta debido a la alimentación de las raíces de las larvas de D. abbreviatus fue mínima (promedios de 1-1,4 en una escala de calificación de 1-5) en plantas proximales y distales a la planta central infestada con D. abbreviatus. El tratamiento no afectó las tasas de marchitez y muerte de las plantas en las plantas proximales, pero la muerte de las plantas distales ocurrió solo en las parcelas de control. Nuestros resultados mostraron que S. riobrave infectó y mató a D. abbreviatus en estadio tardío en la fresa en plastificultura en la Florida, y por ello se deben realizar más investigaciones para optimizar las aplicaciones de S. riobrave y desarrollarlas dentro de una estrategia de manejo para D. abbreviatus. & London Research and Development Centre - Vineland Campus, Agriculture and Agri-Food Canada, Vineland Station, Ontario, Canada;
- 2. University of Florida, Gulf Coast Research and Education Center, 14625 County Road 672, Balm, Florida 33598, USA; E-mails: lahiris@ufl.edu (S. L.) & ISK Biosciences, 7470 Auburn Road, Suite A, Concord, Ohio 44077, USA; E-mail: kreyk@iskbc.com (K. L. K.)
- 3. University of Florida, Gulf Coast Research and Education Center, 14625 County Road 672, Balm, Florida 33598, USA; E-mails: lahiris@ufl.edu (S. L.)
Description
Fig. 2. Mean live (± SEM) and dead Steinernema riobrave-infected or uninfected, late-instar Diaprepes abbreviatus from soil in the root-zone of a randomly selected peripheral strawberry plant (n = 6) (see Fig. 1) afer 1 or 2 applications of infective juvenile Steinernema riobrave (25 per cm2 in 50 mL water), 1 application of imidacloprid (Admire® Pro, 767 mL per ha), or water (control) were made 16 and 22 Nov 2017 around the base of each plant. Plants were in raised, plasticulture earthen beds in research plots at the Gulf Coast Research and Education Center, Balm, Florida, USA.
Notes
Published as part of Renkema, Justin M., Krey, Karol L. & Lahiri, Sriyanka, 2021, Control of Diaprepes abbreviatus (Coleoptera: Curculionidae) with Steinernema riobrave (Rhabditida: Steinernematidae) in plasticulture Florida strawberry, pp. 124-130 in Florida Entomologist 104 (2) on page 127, DOI: 10.1653/024.104.0208, http://zenodo.org/record/13684905
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- Journal article: 10.1653/024.104.0208 (DOI)
- Journal article: urn:lsid:plazi.org:pub:F6508875C774FF8A5832FFA6A45C884E (LSID)
- Journal article: https://zenodo.org/record/13684905 (URL)