Shady S. Atallah
Cornell University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Shady S. Atallah.
American Journal of Enology and Viticulture | 2012
Shady S. Atallah; Miguel I. Gómez; Marc Fuchs; Timothy E. Martinson
Leafroll disease is one of the most important virus diseases of grapevines worldwide. It reduces yields, delays fruit ripening, reduces soluble solids, and increases titratable acidity in fruit juice. This study uses a net present value (NPV) approach over a 25-year lifespan of a vineyard to examine the economic impact of grapevine leafroll disease (GLRD) on Vitis vinifera cv. Cabernet franc in Finger Lakes vineyards of New York. It identifies optimal disease control options under several scenarios of disease prevalence, yield reduction, and fruit quality effects. The estimated economic impact of GLRD ranges from approximately
American Journal of Enology and Viticulture | 2015
Katie D. Ricketts; Miguel I. Gómez; Shady S. Atallah; Marc Fuchs; Timothy E. Martinson; Mark C. Battany; Larry J. Bettiga; Monica L. Cooper; Paul S. Verdegaal; Rhonda J. Smith
25,000 (for a 30% yield reduction and no grape quality penalty) to
American Journal of Agricultural Economics | 2015
Shady S. Atallah; Miguel I. Gómez; Jon M. Conrad; Jan P. Nyrop
40,000 (for a 50% yield reduction and a 10% penalty for poor fruit quality) per hectare in the absence of any control measure. The per hectare impact of GLRD can be substantially reduced to
Land Economics | 2017
Shady S. Atallah; Miguel I. Gómez; Jon M. Conrad
3,000–
Nature Sustainability | 2018
Timothy M. Bowles; Shady S. Atallah; Eleanor E. Campbell; Amélie C.M. Gaudin; William R. Wieder; A. Stuart Grandy
23,000 through roguing if levels of disease prevalence are moderate (1–25%). With disease prevalence levels greater than 25%, replacing the entire vineyard is the optimal response, yielding economic losses of ~
Food Policy | 2014
Shady S. Atallah; Miguel I. Gómez; Thomas Björkman
25,000/ha. Furthermore, the use of vines derived from certified, virus-tested stocks in replant sites is predicted to keep the costs associated with GLRD infection to ~
Ecosystem services | 2017
Yangyang Wang; Shady S. Atallah; Guofan Shao
1,800/ha. No intervention appears to be economically optimal when (1) infection levels are high (>25%), yield reduction is moderate (<30%), and no price penalty is enforced or (2) when GLRD is transmitted through vectors after year 19. These findings are valuable to construct integrated decision matrices for vineyard managers to devise profit-maximizing disease control strategies and to create incentives for extended uses of clean, virus-tested planting material.
2012 Annual Meeting, August 12-14, 2012, Seattle, Washington | 2012
Shady S. Atallah; Miguel I. Gómez; Jon M. Conrad; Jan P. Nyrop
Grapevine leafroll disease (GLRD) is a devastating viral disease found across all grapegrowing regions. Vineyard managers have adopted various strategies for managing GLRD, including roguing individual symptomatic vines and replacing them with certified vines derived from clean, virus-tested stocks; applying insecticides targeting mealybug vector populations to reduce disease spread and minimize long-term impacts; and fully replanting vineyards at the onset of disease symptoms. Moreover, some managers elect not to control GLRD at all. We collected survey data from vineyard managers throughout the three major California grapegrowing counties, Napa, Sonoma, and Northern San Joaquin Valley, to estimate the economic impact of GLRD on Cabernet Sauvignon vines. The goal was to identify cost-minimizing management strategies under various disease-prevalence levels, price penalties, timing of disease onset relative to vineyard age, yield losses, and costs of control. Our results estimated that the economic cost of GLRD ranged from
Ecological Economics | 2018
Shady S. Atallah; Miguel I. Gómez; Juliana Jaramillo
29,902 to
Ecological Modelling | 2017
Eckart Bindewald; Shady S. Atallah
226,405 per ha. Roguing symptomatic vines and replanting with certified vines in combination with insecticides to reduce mealybugs may minimize losses if GLRD prevalence is low (between 5 and 10%), while a full vineyard replacement should be pursued if disease prevalence is higher, generally above 25%, although regional differences were noted. These findings should help vineyard managers in the three regions examined to adopt optimal GLRD management strategies that can be tailored regionally or locally to unique market opportunities, potential market prices, and annual operating costs.