20 documents found, page 1 of 2
The influence of the storage period on the suppressive capacity of composts enr...
Guerreiro David Coelho, Luísa Isabel; Reis, Mário; Dionísio, Lídia; Guerrero, CarlosComposts can be used to improve soil fertility while controlling soil diseases, contributing to the circular economy in agriculture. Biological control of soil diseases may be achieved by the activity of antagonistic microorganisms, that, by different ways, prevent the development of phytopathogenic microorganisms, being Trichoderma spp. one of the best-known antagonistic fungi. In this work, the evolution of t...
High diversity of Phytophthora species in natural ecosystems and nurseries of P...
Horta Jung, Marília; Maia, Cristiana; Mora-Sala, Beatriz; Abad-Campos, Paloma; Schena, Leonardo; Mosca, Saveria; Carella, Giuseppe; Moricca, SalvatoreBetween 2010 and 2015, an extensive survey of Phytophthora diversity was performed across Portugal. Baiting and direct isolation tests obtained 48 Phytophthora taxa in 62 of 70 forest stands (89%) from 148 of 302 rhizosphere soil samples (49%) and 25 of 29 tree species (86%), and from bark cankers of Alnus lusitanica and Fagus sylvatica ; from 33 of 34 rivers and forest streams (97%); and in 12 of 13 forest nur...
Biological control of turfgrass diseases with organic composts enriched with Tr...
Coelho, Luísa; Reis, Mário; Guerrero, Carlos; Dionísio, LídiaThe increasing demand of natural products for the control of plant diseases has led to the search for biological control agents, namely fungi, often isolated from composts of organic residues. By composting two different mixes of agro-industrial residues, P1 and P2 composts were obtained, from where a known antagonist, Trichoderma atroviride, was isolated. Later, a second composting process was performed and wh...
Biodetection of turfgrass fungal diseases using sniffer dogs
Serrão, M.; Coelho, Luísa; Dionísio, Lídia; Guerrero, Carlos; Duarte, AmilcarThe results in this work evaluated the sensitivity and specificity of the olfactory capacity of the intervening dog in the fungus biodetection. On 100 attempts, a sensitivity and a specificity of 100% (Table 1) were obtained for the biodetection of the fungus Sclerotium rolfsii when the 4-year-old English Springer Spaniel female dog was faced to a straight line of 5 equally distanced Falcons. The post-inoculati...
Use of cork residues to control turfgrass diseases
Coelho, Luísa; Dionísio, Lídia; Reis, Mário; Guerrero, CarlosThe worldwide increase in agricultural and industrial production has created environmental problems. Economic and environmental benefits can be gathered solving a problem of the agroindustry by applying their sub products to soil. The compromise to decrease the use of pesticides and fertilizers, which may be hazardous, has provided opportunities for the development of new sustainable crop management practices. ...
Use of organic composts to suppress bentgrass diseases in Agrostis stolonifera
Coelho, Luísa; Reis, Mário; Guerrero, Carlos; Dionísio, LídiaTurfgrasses are affected by fungal diseases and their chemical control is currently limited by the legislation and the impact on the environment of fungicides and the possible development of fungicide resistance. This study was carried out during three years to evaluate the antagonistic effect of the microbiota associated with organic composts. Two composts were produced from agro-industrial residues, P1 and P2...
Valorização de resíduos de fruticultura por compostagem: obtenção de produtos f...
Coelho, Luísa; Dionísio, Lídia; Guerrero, Carlos; Reis, MárioA compostagem pode valorizar os resíduos de fruticultura, obtendo-se compostos com interesse agrícola. Neste trabalho apresenta-se a caracterização físico-química de quatro compostos de resíduos de citrinos e outros resíduos agrícolas, e resultados obtidos no controlo de doenças. Os compostos testados são designados pelas letras A a D, indicando-se entre parenteses a proporção em volume dos resíduos de citrinos...
Presença da sarna da batata-doce (Monilochaetes infuscans) em Portugal continental
Duarte, Amilcar; Coelho, Luísa; Louro, Pedro; Costa, João; Dionísio, LídiaA batata-doce é uma cultura oriunda do continente americano, que está presente no sul de Portugal desde há vários séculos, fazendo parte das tradições gastronómicas desta zona do país. Tradicionalmente, a batata-doce fazia parte de um sistema de rotação de culturas, alternando com cereais e leguminosas. Nessas condições, a cultura não apresentava problemas fitossanitários, não carecendo, portanto, de aplicação ...
First report of curvularia trifolii causing curvularia blight in agrostis stolo...
Coelho, Luísa; Borrero, C.; Bueno-Pallero, Francisco Angel; Guerrero, Carlos; Fonseca, Filomena; Reis, Mário; Avilés, M.; Dionísio, LídiaAlgarve region (Portugal) has nearly 40 golf courses with a significant economic impact. Summer surveys on 10 golf courses detected an unknown disease on one course in 2009 and on another course in 2012 and 2013 at 29 to 30°C daily average. The second course had symptoms on about 25% of the turf of two putting greens. Diseased bentgrass (Agrostis stolonifera L.) had a green dappled pattern with irregular patche...
Controlo de Sclerotinia homoeocarpa em relva com compostos orgânicos
Coelho, Luísa; Dionísio, Lídia; Guerrero, Carlos; Reis, MárioOs relvados são suscetíveis a doenças causadas por fungos, sendo Sclerotinia homoeocarpa um dos que causa maiores prejuízos em muitos países. A compostagem permite a valorização e tratamento de resíduos orgânicos, originando compostos com aplicações agrícolas, nomeadamente para controlo de doenças causadas por patogénicos do solo. Produziram-se dois compostos, designados P1 e P2, por compostagem de resíduos agr...