Browse by author
Lookup NU author(s): Nikos Dafermos,
Dr Michael Eyre,
Professor Carlo Leifert
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Dafermos, N. G., Kasselaki, A. M.. Goumas, D. E., Spantidakis, K., Eyre, M. D., and Leifert, C. 2012. Integration of elicitors and less-susceptible hybrids for the control of powdery mildew in organic tomato crops. Plant Dis. 96:1506-1512. Powdery mildew is a serious economic problem in Mediterranean tomato production. The disease is currently controlled by fungicides (especially sulfur) in both conventional and organic production. Four factorial greenhouse experiments were conducted in successive cropping seasons (autumn 2005, autumn 2006, spring 2006, and spring 2007) to assess the main and combined effects of (i) a less-susceptible hybrid ('Elpida'), (ii) chitin soil amendment, or (iii) Milsana or chitosan elicitor foliar treatments on the severity of powdery mildew and crop performance. Analysis of variance revealed significant effects of cropping season on disease severity and crop yield. All control practices reduced disease severity; reductions of approximately 40, 30, 15, and 15% were achieved by Milsana foliar treatment, the use of a less-susceptible hybrid, chitosan foliar treatment, and chitin soil amendment, respectively. In the season with the highest disease pressure, higher yields were obtained with the less-susceptible hybrid Elpida whereas, in the three seasons with no or low disease pressure, the use of the more susceptible hybrid 'Bison' produced higher yields. Milsana and sulfur treatments did not significantly affect yield (yields were slightly lower compared with untreated control plants) and, therefore, their use cannot be recommended based on the results obtained.
Author(s): Dafermos NG, Kasselaki AM, Goumas DE, Spantidakis K, Eyre MD, Leifert C
Publication type: Article
Publication status: Published
Journal: Plant Disease
Print publication date: 01/10/2012
ISSN (print): 0191-2917
ISSN (electronic): 1943-7692
Publisher: American Phytopathological Society
Altmetrics provided by Altmetric