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Management and Control of Almond Red Leaf Blotch, One of the Main Diseases Affecting Almond Crops

X. Miarnau

IRTA-Estació Experimental de Lleida

Management and Control of Almond Red Leaf Blotch, One of the Main Diseases Affecting Almond Crops

L. Torguet y X. Miarnau
IRTA - Lleida Experimental Station 
Parc de Gardeny-Fruitcentre. E-25003 Lleida (SPAIN)
e-mail: laura.

Management and Control of Almond Red Leaf Blotch, One of the Main Diseases Affecting Almond Crops

L. Torguet y X. Miarnau
IRTA - Lleida Experimental Station 
Parc de Gardeny-Fruitcentre. E-25003 Lleida (SPAIN)
e-mail: laura.torguet@irta.cat


Almond red leaf blotch caused by the fungus Polystigma amygdalinum is currently one of the most significant diseases affecting almond trees in Spanish orchards. 
This disease has recently become more prevalent in Spain owing to increased planting in inland areas and the use of certain new varieties that are more susceptible than traditional ones. 
This disease is the most prevalent in almonds grown in Spain, both in the Southeast (Alicante, Murcia, Almería and Granada) and the rest of the Spanish Mediterranean area and the Ebro valley, both in terms of intensity and the annual regularity with which it appears. Almond red leaf blotch has also been described in various almond-producing countries of the Mediterranean.
The pathogen causes blotches of varying size (1 - 2 cm) and shape on the leaves. These are initially yellow and later turn reddish-brown, reducing photosynthetic capacity, and causing defoliation in some cases. All of this adversely affects the productivity the following year. 
It is vital to manage this disease in new almond orchards being planted throughout Spain, therefore it will be essential to have a sound knowledge of the disease cycle and the tools needed to control it. 
Knowledge of tolerance to the disease may help to make the right choice of varieties to plant and to define a suitable control strategy based on the climate characteristics of the area. All of this may help to reduce the incidence of pathological issues, with the consequent reduction in the use of pesticides.

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Data protection policy

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.
- Statement of the purpose of the request.
- Address for notification purposes.
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.