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Open access

Kristine R. Buckland, Cynthia M. Ocamb, Ann L. Rasmussen, and Lloyd L. Nackley

Fresh market tomatoes ( Solanum lycopersicum ) in the Pacific Northwest region of the United States are mostly grown under plastic or greenhouse systems. Recent outbreaks of tomato powdery mildew, incited by Leveillula taurica and Oidium

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Jack E. McCoy and Paul W. Bosland

Souza, V.L. Café-Filho, A.C. 2003 Resistance to Leveillula taurica in the genus Capsicum Plant Pathol. 52 613 619 U.S. Department of Agriculture 2017 Vegetables 2016 summary. U.S. Dept. Agr., Washington, DC Velásquez-Valle, R. Valle-Garcia, P. 1999

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Nicholas D. Warren, Rebecca G. Sideman, and Richard G. Smith

Tomato (Solanum lycopersicum) growers select cultivars based on a range of performance criteria. Currently, however, information regarding tomato cultivar performance in high tunnels is lacking. We conducted a tomato cultivar trial in an 1800-ft2 plastic-covered high tunnel in Durham, NH, with 15 indeterminate cultivars using organic fertilizers and pesticides. Tomatoes were grown in-ground in a randomized complete block design (n = 4) using raised beds with plastic mulch and drip irrigation. Marketable and unmarketable yield, several yield components, and susceptibility to two common diseases, leaf mold (Fulvia fulva) and powdery mildew (Oidium lycopersici or Leveillula taurica), were evaluated over a 3-year period. Differences between cultivars existed in all areas of interest, and year-to-year variation in performance was noteworthy in this experiment. ‘Geronimo’ consistently had among the highest yields, ‘Arbason’ and ‘Massada’ produced many individual fruit, and several cultivars including Rebelski, Massada, and Geronimo showed no signs of disease. Some cultivars such as Conestoga appeared susceptible to several different physiological disorders while others were relatively robust against this type of marketable yield reduction. Because we assessed multiple yield and quality variables and observed apparent trade-offs in several of these, we used radar plots to summarize and communicate the performance of each cultivar in an intuitive and comparable manner. Based on these data, several tomato cultivars appear particularly well suited for high tunnel production in northern New England.

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Robert H. Stamps

on both plants and the micro-organisms associated with them. For example, although pepper yields were increased under colored shade nets as mentioned, powdery mildew ( Leveillula taurica ) leaf coverage and leaf shedding resulting from disease were

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Xianqin Qiu, Hongying Jian, Qigang Wang, Kaixue Tang, and Manzhu Bao

abiotic treatments. Zheng et al. (2013) reported that the transcripts of CaMLO2 from pepper ( Capsicum annuum ) were upregulated at time points of 5, 7, and 25 HPI with pepper powdery mildew ( Leveillula taurica ). The abovementioned all candidate

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Juan Carlos Díaz-Pérez and Kelly St. John

pathogen, the host, or their interaction with the environment. The influences of shade nets on plant diseases are little understood. In pepper, under colored shade nets, leaf coverage by powdery mildew ( Leveillula taurica ) was found to augment with

Open access

Michael J. Bradshaw, Luis Quijada, Patrick C. Tobin, Uwe Braun, Cindy Newlander, Tom Potterfield, Élan R. Alford, Carlos Contreras, Allen Coombes, Swarnalatha Moparthi, Erin Buchholz, Daniel Murphy, Wade Enos, Amy Fields-Taylor, Anna Bower, and Donald H. Pfister

-specific or have an extremely wide host range. For example, Erysiphe cornutae and E. coryli-americanae are confined to single host taxa ( Corylus cornuta and C. americana , respectively), whereas Leveillula taurica and Golovinomyces ambrosiae each

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Juan Carlos Díaz-Pérez and Erick Smith

, postharvest attributes, and incidence of Phytophthora blight (caused by Phytophthora capsici Leon.) HortScience 49 891 900 Elad, Y. Messika, Y. Brand, M. David, D.R. Sztejnberg, A. 2007 Effect of colored shade nets on pepper powdery mildew ( Leveillula

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Steven P. Arthurs, Robert H. Stamps, and Frank F. Giglia

development: Absolute versus relative amounts of blue light HortScience 48 504 509 Elad, Y. Messika, Y. Brand, M. David, D.R. Sztejnberg, A. 2007 Effect of colored shade nets on pepper powdery mildew ( Leveillula taurica ) Phytoparasitica 35 285 299 Fletcher

Open access

Michael J. Havey

by Leveillula taurica on glossy leaf genotypes of onion in Idaho Plant Dis. 89 431 432 Munaiz, E.D. Groves, R.L. Havey, M.J. 2020 Epicuticular leaf waxes among onion accessions selected for reduced