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Rootstocks for managing soil-borne diseases

Soledad Verdejo-Lucas.

IFAPA

Rootstocks for managing soil-borne diseases.
Soledad Verdejo-Lucas. 
IFAPA, Centro La Mojonera, Camino de San Nicolás 1. 04745.

Rootstocks for managing soil-borne diseases.
Soledad Verdejo-Lucas. 
IFAPA, Centro La Mojonera, Camino de San Nicolás 1. 04745. La Mojonera. Almería. Spain. soledad.verdejo@juntadeandalucia.es

Grafting of susceptible varieties onto resistant or tolerant rootstocks has been used primarily to counteract the damage caused by soil-borne pathogens from the accumulation of inoculum in continuous production systems (such as greenhouses). As well as providing pathogen resistance or tolerance, rootstocks increase the vigour and production of the scion, and increase its tolerance to abiotic stresses such as low temperature and salinity. Rootstocks can be used to manage a range of pathogens (bacteria, fungi, nematodes and viruses) that attack vegetables (aubergine, melon, cucumber, pepper, watermelon and tomato). Some of the main soil-borne pathogens are: Fusarium oxysporum f. sp. cucumerinum, melonis, niveum, lycopersici (strains  0, 1, 2) and radicis-lycopersici, Phytophthora nicotianae, Meloidogyne spp., Verticillium dahliae, and Lycopersici Pyrenochaeta
The effectiveness of rootstocks in suppressing the disease varies according to the genetic background of the rootstock, the pathogen population, and the frequency with which the crop is repeated. The pathogen, production system and environment are crucial to the rootstock-scion combination, as some rootstocks provide tolerance to the disease but not resistance to the pathogen. The effect of the rootstock on non-target pathogens must also be measured. For instance, squash hybrids (Cucurbita maxima x C. mochata) are very effective against Fusarium wilt of watermelon, but highly susceptible to root-knot nematodes. Grafting must be combined with other measures as part of integrated disease management, to ensure the durability of rootstock resistance and therefore prevent the selection of virulent populations that overcome resistance.

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In accordance with the Organic Law on the Protection of Personal Data 15/1999, of 13 December, Promotora de Exportaciones Catalanas SA (hereinafter PRODECA), whose address is Gran Via de les Corts Catalanes, 620, principal, 08007 Barcelona, with tax reg. no. NIF A58241316, declares that the images contained on the website www.smartfruitcongress.cat are included in a file belonging to PRODECA. The purpose of this file is the promotion, via its website, of the activities conducted by PRODECA – SmartfFruit IPM International Congress.

PRODECA guarantees that you may, at any time, exercise your right to access, rectify, cancel or oppose by writing to the aforesaid postal address, using the reference "PROTECCIÓN DE DATOS - SMARTFRUIT", or to the email address smartfruitcongress@smartfruitcongress.cat.

Specifically, to correctly exercise these rights you must clearly provide the following items in that communication:
- Name, surname(s) and photocopy of National Identity Document or Passport.
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PRODECA also declares that it reserves the right to delete from its website any content that it considers violates current and applicable legislation.

D’acord amb l’article 17.1 de la Llei 19/2014, la ©Generalitat de Catalunya permet la reutilització dels continguts i de les dades sempre que se'n citi la font i la data d'actualització i que no es desnaturalitzi la informació (article 8 de la Llei 37/2007) i també que no es contradigui amb una llicència específica.