Evaluation of Systemic Imidacloprid and Herbicide Treatments on Flatheaded Borer (Coleoptera: Buprestidae) Management in Field Nursery Production
| Autor: | Donna C. Fare, Jason B. Oliver, Nadeer N. Youssef, Karla M. Addesso |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
AcademicSubjects/SCI01382 Insecticides media_common.quotation_subject Acer 010501 environmental sciences Cyfluthrin Biology 01 natural sciences Insect Control Competition (biology) chemistry.chemical_compound Neonicotinoids Imidacloprid Animals 0105 earth and related environmental sciences media_common Ecology Herbicides Neonicotinoid neonicotinoid General Medicine biology.organism_classification Nitro Compounds insect suppression Coleoptera 010602 entomology Horticulture Deciduous chemistry Insect Science visual_art visual_art.visual_art_medium maple Bark Female Weed competition Buprestidae Horticultural Entomology |
| Zdroj: | Journal of Economic Entomology |
| ISSN: | 1938-291X 0022-0493 |
| Popis: | The flatheaded appletree borer, Chrysobothris femorata (Olivier) (Coleoptera: Buprestidae), and related species are deciduous tree pests. Female beetles prefer to oviposit at tree bases, and larvae tunnel beneath the bark, which weakens or kills young or newly transplanted trees. In the first objective of this study, Discus N/G (2.94% imidacloprid + 0.7% cyfluthrin) applied at six lower-than-labeled rates (0.0, 0.98, 1.97, 3.94, 5.91, and 7.87 ml/cm of average trunk dia.) was evaluated for protection of field-grown maples. A second objective evaluated imidacloprid with and without herbicides to assess the impact of weed competition at the tree base on insecticide effectiveness. A third objective determined relative imidacloprid concentrations in leaf tissue samples with ELISA and related to insecticide rates, herbicide treatments, and the level of flatheaded borer protection. In two trials, higher rates of insecticide were more effective at protecting trees, with rates ≥3.94 ml product/cm trunk diameter performing equivalently. Weed-free trees had more borer attacks and grew faster than trees in weedy plots. Imidacloprid content in leaf tissues had a trend for higher concentrations in smaller, weedy trees in the first season, but that pattern disappeared in subsequent years. Based on fewer attacks in weedy versus weed-free trees (60−90% reduction), it was concluded that weed presence can reduce borer attack success in nurseries independent of insecticide treatment, but tree growth was reduced by weed presence. In addition, Discus applied at rates >3.94 ml/cm did not confer added borer damage protection in weedy plots. |
| Databáze: | OpenAIRE |
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