Plant Disease (2013) 97, 780-788

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Patrícia da S. Machado, Acelino C. Alfenas, Marcelo M. Coutinho, Cláudio M. Silva, Ann H. Mounteer, Luiz A. Maffia, Rodrigo G. de Freitas and Camila da S. Freitas (2013)
Eradication of plant pathogens in forest nursery irrigation water
Plant Disease 97 (6), 780-788
Abstract: Interest in rational use and reuse of water has increased in recent years, especially in forest nurseries. However, before water can be reused in nurseries, it must be properly treated to eradicate plant pathogens to reduce risks of pathogen dispersal and losses to disease. In the present study, the efficacy of irrigation water treatment by ultrafiltration and conventional physical-chemical treatment was studied to eliminate Botrytis cinerea, Cylindrocladium candelabrum, Ralstonia solanacearum, and Xanthomonas axonopodis, the pathogens most commonly found in Brazilian forest nurseries. Ultrafiltration eradicated over 99% of R. solanacearum, X. axonopodis, and B. cinerea and 100% of C. candelabrum. The few remaining cells or conidia of R. solanacearum and B. cinerea did not induce disease in irrigated rooted cuttings. Flocculation and fast sand filtration used in physical-chemical treatment completely eliminated C. candelabrum but the other pathogens were only removed after chlorination of the filtered water. Both forms of treatment are viable, practical, and safe methods for plant pathogen removal from irrigation water.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Acelino C. Alfenas, Luiz A. Maffia

Research topic(s) for pests/diseases/weeds:
control - general


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Botrytis cinerea
Xanthomonas axonopodis
Ralstonia solanacearum
Calonectria candelabra