Efficacy of four systemic insecticides for reducing Nantucket pine tip moth (Rhyaciona frustrana) (Lepidoptera: Tortricidae) infestation levels and improving growth metrics in loblolly pines.
E McCarty, V C Cassidy, D Clabo, D Dickens, C Asaro, K J K Gandhi
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引用次数: 1
Abstract
The Nantucket pine tip moth (NPTM) (Rhyacionia frustrana Comstock) is a native, regeneration pest of young loblolly pines (Pinus taeda L.), causing shoot dieback, tree deformity, and growth and volume declines. Soil applications of systemic insecticides may be an effective strategy to suppress NPTM populations. The study objective was to assess the efficacy of four systemic insecticide treatments (chlorantraniliprole, dinotefuran, fipronil, and imidacloprid) for two growing seasons in outplanted bareroot and containerized seedling trials. Response variables included NPTM infestation rates, along with tree height, groundline diameter, volume index, and stem form. Infestation rates significantly decreased for each systemic insecticide treatment during the first year compared to controls, although dinotefuran and imidacloprid provided season-long control in one trial. Chlorantraniliprole reduced NPTM infestation rates for two growing seasons in both trials. While imidacloprid treatments did not alter growth metrics except for one comparison, fipronil and dinotefuran treatments improved several growth metrics. Chlorantraniliprole consistently improved growth metrics throughout the study.
期刊介绍:
Journal of Economic Entomology the most-cited entomological journal – publishes articles on the economic significance of insects and other arthropods and includes sections on apiculture & social insects, insecticides, biological control, household & structural insects, crop protection, forest entomology, and more. In addition to research papers, Journal of Economic Entomology publishes Reviews, interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal is published bimonthly in February, April, June, August, October, and December.