Bioassays Comparing Different Insecticides Against <i>Systena frontalis</i> Adults on <i>Hydrangea paniculata</i>, 2022

Lane, Eleanor L; Pozo‐Valdivia, Alejandro I. Del

doi:10.1093/amt/tsac129

Arthropod Management Tests

2022

DOI: 10.1093/amt/tsac129

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Bioassays Comparing Different Insecticides Against Systena frontalis Adults on Hydrangea paniculata, 2022

Eleanor L Lane

Alejandro I. Del Pozo‐Valdivia

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2023

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“…Nursery growers in Virginia could spray insecticides up to twice a week to control severe infestations of S. frontalis adults (Del Pozo-Valdivia, anecdotal observation). These growers rely on applications of either pyrethroids, neonicotinoids (Joseph et al 2021), or organophosphates (Lane and Del Pozo-Valdivia 2022) to reduce populations of this pest. The aforementioned insecticides could be harmful to beneficial insects such as pollinators (Main et al 2020) predators, parasitoids, and other naturally occurring beneficial insects.…”

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“…Reducing predator and parasitoid populations due to exposure to frequent insecticide sprays may lead to secondary pest outbreaks, such as thrips and mites, under different settings (Hajek and Eilenberg 2018), including nurseries. Insecticide testing within cranberry (Guédot and Perry 2015) and ornamental crop systems (Lane and Del Pozo-Valdivia 2022) showed that few insecticides were effective against this pest. Potential options within nurseries include the novel IRAC Group 30 insecticide, isocycloseram (Lane and Del Pozo-Valdivia 2022), which has yet to become commercially available as of 2022.…”

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confidence: 99%

“…Insecticide testing within cranberry (Guédot and Perry 2015) and ornamental crop systems (Lane and Del Pozo-Valdivia 2022) showed that few insecticides were effective against this pest. Potential options within nurseries include the novel IRAC Group 30 insecticide, isocycloseram (Lane and Del Pozo-Valdivia 2022), which has yet to become commercially available as of 2022.…”

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confidence: 99%

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Temporal and spatial factors influencing Systena frontalis (Coleoptera: Chrysomelidae) behavior in Virginia nurseries

Lane

Pozo‐Valdivia

2023

Environmental Entomology

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Ornamental plant production in eastern Virginia nurseries have been greatly impacted by Systena frontalis (F.), also known as the red-headed flea beetle. With the advent of S. frontalis as a prevalent pest in the past 2 decades, baseline phenology and behavior are currently understudied within Virginia nurseries. This pest is costly to control due to insecticide expenses and loss of saleable plants. In 2021 and 2022, populations of this insect were monitored at 2 commercial nurseries in eastern Virginia in order to better understand their temporal and spatial population dynamics. Patterns that emerged indicated S. frontalis could have up to 3 generations in eastern Virginia, with peaks of adult abundance in June, late July, and late August to early September. Phenylethyl alcohol was tested as an adult attractant lure, but it was found to be ineffective under nursery conditions. Diel monitoring demonstrated these adults were most active from 1100 to 1500 h. Severity of defoliation at the leaf level increased linearly with increased density of adults, where 5 individuals defoliated up to 4% of any Hydrangea paniculata cv. ‘Limelight’ leaf in 1 wk under greenhouse conditions. Timing of scouting and insecticide sprays according to the adult activity peaks of the day and across the season may allow reduction in overall insecticide usage.

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Temporal and spatial factors influencing Systena frontalis (Coleoptera: Chrysomelidae) behavior in Virginia nurseries

Lane

Pozo‐Valdivia

2023

Environmental Entomology

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Effects of Insecticide Drench Application against Immatures of Systena frontalis in Container-grown Hydrangea paniculata

Joseph,

Del Pozo-Valdivia

2023

Journal of Environmental Horticulture

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Systena frontalis (F.) (Coleoptera: Chrysomelidae), commonly referred to as the redheaded flea beetle, is a serious pest in container nurseries, as adult feeding defoliates nursery crops and affects plant salability. Because the foliar application of insecticides provides inconsistent efficacy, additional and alternative control tactics are sought to target immatures of this pest in growing media. Thus, the objective was to determine the effects of non-neonicotinoid insecticides applied as a drench to growing media on immatures of S. frontalis. In 2021 and 2022, nine active ingredients were evaluated in four trials in a Georgia nursery and at a Virginia research and extension center. If available, the maximum label rates for flea beetles or other coleopteran pests were applied once to Hydrangea paniculata Siebold containers (11.4 L, 3 gal) as a drench application. The emergence of S. frontalis adults from treated growing media and foliar feeding damage was lower for the tetraniliprole (TetrinoTM) and spinetoram + sulfoxaflor (XXpire®) treatments than for nontreated plants. Cyclaniliprole (SarisaTM) and chlorantraniliprole (Acelepryn®) suppressed S. frontalis adult eclosion with less feeding damage than the nontreated plants. Tetraniliprole, spinetoram + sulfoxaflor, and cyclaniliprole are not labeled for drench application. Dinotefuran (Safari®) effectively reduced adult emergence and feeding damage. Species used in this study: Redheaded flea beetle, Systena frontalis (F.); panicled hydrangea, Hydrangea paniculata Siebold. Chemicals used in this study: Cyantraniliprole (Mainspring®GNL), chlorantraniliprole (Acelepryn®), tetraniliprole (TetrinoTM), cyclaniliprole (SarisaTM), Spinetoram + Sulfoxaflor (XXpire®), tolfenpyrad (Apta®), Chromobacterium (Grandevo®CG), flupyradifurone (AltusTM), dinotefuran (Zylam® Liquid, Safari® 20G), and polyterpenes pinene (NuFilm® P).

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Bioassays Comparing Different Insecticides Against Systena frontalis Adults on Hydrangea paniculata, 2022

Cited by 2 publications

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Temporal and spatial factors influencing Systena frontalis (Coleoptera: Chrysomelidae) behavior in Virginia nurseries

Temporal and spatial factors influencing Systena frontalis (Coleoptera: Chrysomelidae) behavior in Virginia nurseries

Effects of Insecticide Drench Application against Immatures of Systena frontalis in Container-grown Hydrangea paniculata

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