Yield-Based Economic Thresholds for Grape Berry Moth (Lepidoptera: Tortricidae) in Juice Grapes
作者： Craig R. Roubos , Keith S. Mason , Luís A. F. Teixeira , Rufus Isaacs
DOI: 10.1603/EC12298
关键词: Integrated pest management 、 Horticulture 、 Agronomy 、 Infestation 、 Biology 、 Vineyard 、 Tortricidae 、 PEST analysis 、 Yield (wine) 、 Paralobesia viteana 、 Pest control
摘要: A 3-yr field study was conducted at commercial juice grape (Vitis labrusca L.) vineyards to develop an economic injury level (EIL) for berry moth, Paralobesia viteana (Clemens) (Lepidoptera: Tortricidae) and determine patterns of cluster injury. Infestation clusters by P. measured biweekly from bloom until harvest, fruit sampled immediately before harvest the yield this pest. Comparison infestation each sampling date that found just revealed stronger relationships over time, early August least 50% variation in preharvest accounted previous infestation. Grape declined with increasing viteana, allowing calculation EIL which value lost equaled cost insecticide applications prevent Using two scenarios pest control programs based on pyrethroid or diamide insecticides, EILs were calculated be 9.9 17.7% damaged, respectively. For use vineyard integrated management programs, we propose using 5 10% damaged as action thresholds further testing trials evaluate plans guide decision-making under different scenarios.
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