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Home » Publications » Papers in scientific journals and popular science publications» 2002

Root rot caused by Rosellinia necatrix in Camellia
American Camellia Yearbook 2002: 109-113, 2002

Aguín, O.

Estación Fitopatolóxica do Areeiro.

Sáinz, M.J.

Departamento de Producción Vegetal, Universidad de Santiago. Campus de Lugo.

Salinero, M.C.
Pintos, C.
Mansilla, J.P.

Estación Fitopatolóxica do Areeiro.

ABSTRACT:     Root rot is one of the most important diseases affecting camellias. It can be caused by diverse pathogens, but in all cases the external manifestations are very similar. The most common causal pathogen, in our region Galicia (nothwest Spain) as in the rest of the world, is Phytophthora cinnamomi Rands. This soil-borne fungus enters the plant through the smallest roots, and gradually colonizes the entire root system. Affected plants initially show loss of vigour, reduced growth, and, sometimes, leaf chlorosis; subsequently they show generalized leaf chlorosis, dwarf shoots and gradual defoliation. The roots initially show a light brown discoloration, then turn black and rot, causing death (Mansilla et al., 2001)

Situação Fitopatológica das camélias na região do Entre Douro e Minho de Portugal
Boletín de Sanidad Vegetal y Plagas, 28: 609-622, 2002

J. P. Mansilla Vázquez

Estación Fitopatolóxica do Areeiro.

M. C. Barrote Meira

Av. D. Afonso III, 424-5ºd. 4900-477 Viana do Castelo. Portugal.

C. Pintos Varela
M. C. Salinero Corral

Estación Fitopatolóxica do Areeiro.

ABSTRACT:      Camellia is an ornamental shrub grown in Portugal that has a historical and cultural tradition in this country. This shrub is cultivated both in public and private areas, mainly in the north. In the last years an increment in the number of pests and diseases affecting Camellias is taking place, however little work on this matters have been performed. In this work the phytosanitary condition of Camellias in the most important gardens in Entre Douro e Minho region is monitored. Results show that Cosetacus camelliae mite was found in all surveyed points, and had an average rate of incidence (80 %), which proved to be the highest, while the insect Pulvinaria floccifera was detected in 8 of 10 of the gardens surveyed and its average rate of incidence was 18%. Ciborinia camelliae fungus, recently detected in Spain and Portugal, was observed in every area surveyed and presented the highest damage with an average rate of incidence of 100%. Sunlight damage was the physiopathy with the highest incidence of attack (40%), as it was found in all surveyed points. Other plant pathologies presented a lower incidence.

KEYWORDS: Camellia, Portugal, diseases, pests, physiopathies, pathology, Ciborinia camelliae, Cosetacus Camelliae.

Exploración nutricional del cultivo de Kiwi (Actinidia deliciosa) en el noroeste de España
ITEA (2001), Vol. 97V Nº 2, 106-117

M. J. Lema
M. C. Salinero

Estación Fitopatolóxica do Areeiro.

ABSTRACT:      Results about the nutritional condition of the kiwi (Actinidia deliciosa) grown in acid soils in Northwest Spain for 3 consecutive years are reported. Foliar analysis performed in 6 different stages of culture development show that potassium levels range between medium to high (1,5 to 2,5 % K on dry material), calcium level range between very low to low (1,0 to 4,0% Ca on dry material) and magnesium levels between high to very high (0,4 to 1,0 % Mg on dry material). Calcium and potassium levels presented significant differences among seasons, and calcium and magnesium levels showed year to year variations, associated to soil intake modifications; being less significant the variations between plantations that took place in the same harvest period.

KEYWORDS: Actinidia deliciosa, foliar analysis, mineral nutrition, seasonal evolution of calcium, magnesium and potassium.

Presencia de Tuberkulatus kuricola (Hemiptera: Aphididae) sobre castaños híbridos en España
Boletín de Sanidad Vegetal y Plagas, 27: 395-400, 2001

J. Pedro Mansilla
R. Pérez

Estación Fitopatolóxica do Areeiro.

N. Pérez

Universidad de León. Departamento de Biologia Animal.

V. Seco

Universidad de León. Departamento de Ingeniería Agraria.

P. del Estal
Escuela Técnica Superior de Ingenieros Agrónomos. Unidad de Protección de los Cultivos. Ciudad Universitaria. Madrid.

ABSTRACT:      First report on Tuberculatus kuricola in continental Europe. The aphid detected on chestnut groves in Pontevedra province (Spain) in October 2000 caused an early defoliation, as well as sooty mold. However, little information is available on the consequences of its presence and distribution.

KEYWORDS: Aphids, chestnut tree, oak, Tuberculatus kuricola.

Estudio sobre la biologia y control de Bradysia paupera Tuomikoski (=Bradysia difformis Frey) (Diptera: Sciaridae)
Boletín de Sanidad Vegetal y Plagas, 27: 411-417, 2001

J. Pedro Mansilla
M. I. Pastoriza
R. Pérez

Estación Fitopatolóxica do Areeiro.

ABSTRACT:      Bradysia paupera Tuomikoski belongs to a dyptera group known as Fungus gnats and has been reported as pest on ornamentals and on fodder species. Several reports on the increment of its attacks in other countries, and its detection causing damages in an eucalyptus nursery in Pontevedra, made it necessary to perform a study about its morphology, biology and control. Under field conditions it has a cycle of only 3-4 weeks; and chemical and biological control assays performed on Bradysia paupera larvae proved to be effective for the control of this species.

KEYWORDS: Bradysia paupera, control, Dyptera, insecticides, Steinernema feltiae.

A fast method for production of Armillaria inoculum
Mycologia, 93(3), 2001, pp. 612-615

J. Pedro Mansilla
Olga Aguín

Estación Fitopatolóxica do Areeiro.

María J. Sáinz

Departamento de Producción Vegetal, Universidad de Santiago. Campus de Lugo.

ABSTRACT:     A new method is described for the production of inoculum of Armillaria species. An Armillaria mellea isolate was obtained from an infected grapevine plant. Inocula were then obtained by the new method (in which the host-wood rods are incubated in benomyl-dichloran-streptomycin medium) and by three existing methods. Also, the efficacy of the inoculum produced by the new method was assessed by an experimetnal infection assay using healthy plants of six grapevine rotstocks (196-17 Castel, 110 Richter, 161-49 Couderc, 3309 Couderc, 1103 Paulsen, and 102). The new method produced inoculum within a very short period (15d, versus 3 mo with the best of the existing methods). All rootstocks were infected by the A. mellea isolate, the most resistant being 161-49 Couderc. This method thus offers a significant reduction in the time necessary for pathogenicity testing or any research requiring Armillaria inoculum.

KEYWORDS: Armillaria mellea, pathogenicity testing, vine rootstock, Vitis vinifera, white root rot.

Incidencia e identificación del género Armillaria sobre vid en la provincia de Pontevedra (Galicia)
Phytoma España. Nº 131 Agosto/Septiembre 2001

Aguín Casal, O.
Pintos Varela, C.
Abelleira Argibay, A.
Mansilla Vázquez, J.P.

Estación Fitopatolóxica do Areeiro.

ABSTRACT: The 40 species of Amillaria fungus have a different geographical distribution, hosts and cause several diseases. Identification of these species had always been a very difficult task, however nowadays using PCR (Polymerase Chain Reaction) and RFLP (Restriction Fragment Length Polymorphism) techniques the identification of these species proved to be easier. These techniques were used on Vitis sp. samples showing symptoms of white root rot disease collected in Pontevedra province (Galicia). Three patterns of restriction identified three species: Armillaria mellea, highly pathogenic and Armillaria gallica and Armillaria cepistipes, both saprophytes or weak parasites.

KEYWORDS: Armillaria mellea, Armillaria gallica, Armillaria cepistipes, PCR- RFLP, Vitis sp.