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D.C. Ferree

168 ORAL SESSION 44 (Abstr. 312-318) Tree Fruits: Rootstocks

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John A. Barden and Michele E. Marini

Abbreviation: SSC, soluble solids concentration. We gratefully acknowledge partial financial support from the Rootstock Research Foundation of the International Dwarf Fruit Tree Assn. The cost of publishing this paper was defrayed in part by the

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Sergio Jiménez, Jorge Pinochet, Anunciación Abadía, María Ángeles Moreno, and Yolanda Gogorcena

orchard management costs ( Abadía et al., 2004 ; Sanz et al., 1992 ). The use of Fe chlorosis-tolerant genotypes as rootstocks represents a reliable solution to prevent iron chlorosis ( Socias i Company et al., 1995 ; Tagliavini and Rombolà, 2001

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Nicole L. Russo, Terence L. Robinson, Gennaro Fazio, and Herb S. Aldwinckle

Advancements in rootstock breeding and selection have revolutionized the manner in which apples are grown throughout the world. In modern production systems, selection of an appropriate rootstock is as important to the viability and success of a

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David H. Suchoff, Christopher C. Gunter, and Frank J. Louws

The efficacy of herbaceous grafts relies on the replacement of a scion root system with that of a rootstock with known disease resistance. The use of disease-resistant rootstocks in grafted tomato production has proven efficacious in managing

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Kendra Baumgartner, Phillip Fujiyoshi, Greg T. Browne, Chuck Leslie, and Daniel A. Kluepfel

root rot) ( Mircetich et al., 1998 ). As such, 80% of walnut orchards are planted on Paradox rootstock, a seed-propagated hybrid of J. hindsii (Northern California black walnut) and J. regia , which is more vigorous, more resistant to some

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Tom A. Street, Richard B. Doyle, and Dugald C. Close

rootstocks as a model perennial plant to assess the growth response to various root medium types and soil moisture and nutrient conditions at different biochar application rates. It was hypothesized that: 1) in acidic soil, biochar can increase apple

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Amelia Camprubí and Cinta Calvet

The selection of the most effective arbuscular mycorrhizal (AM) fungi for growth enhancement of citrus cultivars used as rootstocks was the first step toward development of an AM inoculation system in citrus nurseries in Spain. AM fungi were isolated from citrus nurseries and orchards in the major citrus-growing areas of eastern Spain. The most common AM fungi found in citrus soils belonged to Glomus species, and G. mosseae (Nicol. & Gerd.) Gerdemann & Trappe and G. intraradices Schenck & Smith were the AM fungi most frequently associated with citrus roots. The most effective fungus for growth enhancement of citrus rootstocks was G. intraradices. Significant differences in mycorrhizal dependency among rootstocks were confirmed. Sour orange (Citrus aurantium L.) and Cleopatra mandarin (C. reshni L.) were more dependent than Troyer citrange [C. sinensis (L.) Obs. × Poncirus trifoliata (L.) Raf.] and Swingle citrumelo (C. paradisi Macf. × P. trifoliata). Moreover, several inoculation systems for plant production were evaluated for their effectiveness in promoting root colonization of the rootstock cultivars.

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Thibault Nordey, Elias Shem, and Joel Huat

the challenge of combining various agronomic traits, such as high yield, quality, and resistance to abiotic and biotic stress, in the same genotype. Grafting, the union of two plant parts—namely, a rootstock (base of the union to provide the root

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Craig E. Kallsen and Dan E. Parfitt

Similar scion and rootstock growth rates produce strong graft unions in fruit and nut trees. A SRR close to one provides a strong graft union as well as a uniform exterior surface for trunk-shaking harvesters. ‘Kerman’, which has been the standard