A Prophylactic Application of Systemic Insecticides Contributes to the Management of the Hibiscus Bud Weevil Anthonomus testaceosquamosus Linell (Coleoptera: Curculionidae)

Author:

Vargas German1ORCID,Greene A. Daniel2ORCID,Velazquez-Hernandez Yisell1,Yang Xiangbing3ORCID,Kendra Paul E.3ORCID,Revynthi Alexandra M.1ORCID

Affiliation:

1. Entomology and Nematology Department, Tropical Research and Education Center, University of Florida, 18905 SW 280th St, Homestead, FL 33031, USA

2. School of Natural Sciences, High Point University, 1 N University Pkwy, High Point, NC 27268, USA

3. Subtropical Horticulture Research Station, United States Department of Agriculture, Agricultural Research Service, 13601 Old Cutler Rd, Miami, FL 33158, USA

Abstract

The hibiscus bud weevil is an invasive pest that attacks tropical hibiscus. Its management has been challenging due to its cryptic adult and concealed immature stages. We evaluated the efficiency of four systemic insecticides (spirotetramat, chlorantraniliprole, flupyradifurone, and cyantraniliprole) against the pest using two approaches: one applied 4 weeks before infestation (prophylactic) and the other 1 week after (curative). The number of eggs, larvae, and feeding holes per sampled bud were recorded 7, 14, 21, and 28 days after the infestation (prophylactic), and after the application (curative), respectively. In general, a greater number of treatment effects were detected in the prophylactic approach in comparison with those in the curative. With the prophylactic approach, the mean number of larvae and feeding holes per actively growing bud was significantly greater for the control (water) than for all insecticides. Among fallen buds, chlorantraniliprole, cyantraniliprole, and spirotetramat had significantly fewer feeding holes than those in the control. With the curative approach, the mean number of feeding holes was greater in the control with no differences among insecticides. The prophylactic application can effectively suppress initial HBW infestation, in contrast to the curative application targeting already high populations. This provides the opportunity for reducing the impact of this regulated pest in areas of expansion.

Funder

Agricultural Research Service-University of Florida Non-Assistance Cooperative

Animal and Plant Health Inspection Service project

National Horticulture Foundation

Publisher

MDPI AG

Subject

Plant Science,Agronomy and Crop Science,Food Science

Reference36 articles.

1. Skelley, P.E., and Osborne, L.S. (2018). Pest Alert Anthonomus testaceosquamosus Linell, the Hibiscus Bud Weevil, New in Florida, Florida Department of Agriculture and Consumer Services.

2. United States Department of Agriculture (2020). National Agricultural Statistics Service 2019 Census of Horticultural Specialties, United States Department of Agriculture.

3. United States Department of Agriculture (2017). Market Value of Agricultural Products Sold including Food Marketing Practices and Value-Added Products: 2017 and 2012 Census of Agriculture 2017, United States Department of Agriculture.

4. Revynthi, A.M., Velazquez-Hernandez, Y., Canon, M.A., Greene, A.D., Vargas, G., Kendra, P.E., and Mannion, C.M. (2022). Biology of Anthonomus testaceosquamosus Linell, 1897 (Coleoptera: Curculionidae): A New Pest of Tropical Hibiscus. Insects, 13.

5. The North American Species of the Anthonomus squamosus Species-Group (Coleoptera: Curculionidae: Curculioninae: Anthonomini);Clark;Coleopt. Bull.,2019

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