R. Pérez Otero; P. Mansilla Vázquez; M.J. López Villarreal

¹Excma. Diputación de Pontevedra. Servicio Agrario. Estación Fitopatolóxica do Areeiro, Subida a la Robleda s/n, E-36153 Pontevedra, Spain

ABSTRACT:      The production of horticultural crops in O Salnés area is of great importance. Thus, a survey to determine the presence and abundance of phytoseiids on the main horticultural crops growing in O Salnés area (Pontevedra) has been initiated in order to develop biological control methods which can be included in future integrated control programs. Leaf samples (from 10 to 50 samples depending on the age, plant size, cultivar and species) from tomato, pepper, lettuce, chard, green bean, cauliflower, spinach, leek, strawberry, onion, parsley, and carrot were taken and the phytoseiids were then extracted. 770 phytoseid species were found in the samples collected. Euseius stipulatus Athias-Henriot, Neoseilus barkeri Hughes, Neoseilus californicus McGregor, Amblyseius herbicolus Chant y Kampimodromus aberrans Oudemans were the more abundant, thus they seem to be well-adapted to the crops grown in this area. Other species were also found (Neoseiulus aurescens Athias-Henriot, Amblyseius graminis Chant, Amblyseius rademacheri Dosse, Phytoseiulus persimilis Athias-Henriot, Neoseiulus cucumeris Oudemans, Amblyseius maseei Nesbitt, Typhlodromus rhenanoides Athias- Henriot and Phytoseius finitimus Ribaga) but in a lower number, so they were considered of minor importance. The greatest diversity and the highest density of phytoseiids was found on pepper. However, in all surveyed crops the number of mites per leaf sample has been low.

KEYWORDS: Phytoseiids, horticulture, inventory, Salnés area.

O. Aguín ¹, J. P. Mansilla ¹, A. B. Martín², J. M. Sierra²

¹Excma. Diputación de Pontevedra. Servicio Agrario. Estación Fitopatolóxica do Areeiro, Subida a la Robleda s/n, E-36153 Pontevedra, Spain

² Centro de Sanidad Forestal de Calabazanos. Consejería de Medio Ambiente. Junta de Castilla y León. Villamuriel del Cerrato, Palencia. sanidad.forestal@jcyl.es

ABSTRACT:      The distribution and diversity of Cryphonectria parasitica, ascomycete responsible of chestnut blight, were studied in 2003 and 2004 in Castilla and León. 261 samples were collected and Cryphonectria parasitica was detected in 91% of the bark samples analysed. No hypovirulent fungal strains were identified by morphological characters and dsRNA extraction. Eight vegetative compatibility groups (vc) were detected among 239 isolates. Three vc types were compatible with European testers. Most isolates were included in type vc 1, which was compatible with the European tester EU1. The type vc 2 was compatible with EU12 and the type vc 6 with EU28. In León 4 vc types were determined, 6 in Zamora and 1 in Burgos. There was an average of 3.6 types found per province. The highest Shannon diversity index was detected in Zamora with a 1.42. The low diversity of C. parasitica vc types found in Castilla-León will facilitate the establishment of a biological control program.

P. Mansilla Vázquez¹, M. Arias, L.Robertson², A. García-Álvarez², S.C. Arcos², M. Escuer², R. Sanz²

¹Excma. Diputación de Pontevedra. Servicio Agrario. Estación Fitopatolóxica do Areeiro, Subida a la Robleda s/n, E-36153 Pontevedra, Spain

² Dpto Agroecología. CCMA, CSIC, Serrano 115 dpdo, 28006 Madrid, Estación

ABSTRACT:     A survey of the xylophagous insects in the conifer forests, mainly Pinus pinaster woodlands, in Spain was carried out in order to study the phoretic vectors of nematodes of the genus Bursaphelenchus. Fifteen environments sites were characterized on the bases of altitude, rainfall, temperature and conifer species. Specimens of Orthotomicus erosus (n=3476) were captured of which 59% carried nematodes under their elytrous, most of them were aphelenchid fungal-feeding nematodes, but B. fungivorus was found on the beetles from Las Cumbres, Villa Blanca (Huelva), southern Spain, which represent the first record of O. erosus as vector of a Bursaphelenchus sp. The nematode is characterized by morphometric and biomolecular techniques and distribution and ecology of the insects is discussed.

R. Pérez Otero; P. Mansilla Vázquez; P. Mansilla Salinero

Excma. Diputación de Pontevedra. Servicio Agrario. Estación Fitopatolóxica do Areeiro, Subida a la Robleda s/n, E-36153 Pontevedra, Spain

ABSTRACT:     The results of the survey based on the new psyllid attacking eucalyptus Ctenarytaina spatulata Taylor dispersion in Pontevedra province and the results obtained with the monitoring of the biology of the pest in the field are reported in this work. The psyllid was found in all the surveyed stands (there is evidence of non specific predators in some of the points of the survey); however the number of trees with symptoms of the attack is very low. Regarding the insect biology, it is active along the year (with lower densities of population in the coldest months), and several generations overlap.

Keywords:Biology, Ctenarytaina spatulata, Eucalyptus spp., survey, Pontevedra

M.J. Lema, G. González, P. Rodríguez.

Excma. Diputación de Pontevedra. Servicio Agrario. Estación Fitopatolóxica do Areeiro, Subida a la Robleda s/n, E-36153 Pontevedra, Spain

ABSTRACT:     This article compares the current levels of weighed total and extractable metals existing in certan soils receiving slurry with those dedicated to fodder that have received cattle slurry. In adittion, the condition of 300 soils dedicated to the same use is described with an aim to outlining their limitations for the recycling of slurry in line with the trends laid down by the European Union and the proposals for the management of slurry in other geografical regions of Spain.