Articles
PRELIMINARY REPORT ON SYSTEMIC ACQUIRED RESISTANCE IN PINEAPPLE PLANTS TO CONTROL FUSARIUM SUBGLUTINANS
Article number
702_21
Pages
167 – 171
Language
English
Abstract
Fusariose, caused by Fusarium subglutinans, is the most serious pineapple disease in Brazil.
First reported in 1964 on fruits of cultivar Smooth Cayenne, by 1992 the disease was detected in Bolivia.
Systemic acquired resistance (SAR) is a well-reported phenomenon that shows possibilities for the integrated management of plant diseases.
Thus we evaluated the effect of acibenzolar-S-methyl (ASM), as a SAR inducer on pineapple plants, aiming at developing an alternative control measure for the fusariose disease.
Pineapple slips, grown in plastic bags under greenhouse conditions, were sprayed with ASM (50, 100, 150, 200 and 250 ppm). Inoculation with F. subglutinans, by wounding and dipping, was performed at 2, 4, 6 or 8 weeks after treatment.
Spraying ASM reduced disease severity when inoculation was performed 4 weeks after ASM treatment.
Disease development in pineapple slips increased when inoculation was performed 6 or 8 weeks after ASM treatment.
No significant effect was observed on the development of fusariose in pineapple slips inoculated 8 weeks after ASM treatment in comparison with the control plants.
Similar to the effect on slips, ASM at 150 ppm reduced fusariose severity in pineapple fruits when plants were treated 4 weeks before inflorescence inoculation.
Although low, fusariose incidence in fruits from plants that were treated with ASM 5 weeks before inoculation was higher than that observed in fruits from plants treated 4 weeks before inoculation.
These results suggest that the acquired resistance lasts for a short time as observed in slips.
Although preliminary, these results show the potential of SAR for the control of pineapple fusariose.
First reported in 1964 on fruits of cultivar Smooth Cayenne, by 1992 the disease was detected in Bolivia.
Systemic acquired resistance (SAR) is a well-reported phenomenon that shows possibilities for the integrated management of plant diseases.
Thus we evaluated the effect of acibenzolar-S-methyl (ASM), as a SAR inducer on pineapple plants, aiming at developing an alternative control measure for the fusariose disease.
Pineapple slips, grown in plastic bags under greenhouse conditions, were sprayed with ASM (50, 100, 150, 200 and 250 ppm). Inoculation with F. subglutinans, by wounding and dipping, was performed at 2, 4, 6 or 8 weeks after treatment.
Spraying ASM reduced disease severity when inoculation was performed 4 weeks after ASM treatment.
Disease development in pineapple slips increased when inoculation was performed 6 or 8 weeks after ASM treatment.
No significant effect was observed on the development of fusariose in pineapple slips inoculated 8 weeks after ASM treatment in comparison with the control plants.
Similar to the effect on slips, ASM at 150 ppm reduced fusariose severity in pineapple fruits when plants were treated 4 weeks before inflorescence inoculation.
Although low, fusariose incidence in fruits from plants that were treated with ASM 5 weeks before inoculation was higher than that observed in fruits from plants treated 4 weeks before inoculation.
These results suggest that the acquired resistance lasts for a short time as observed in slips.
Although preliminary, these results show the potential of SAR for the control of pineapple fusariose.
Publication
Authors
A.P. de Matos, J.R.S. Cabral, C.M.B. Querino, R.C. Caldas
Keywords
Ananas comosus var. comosus, pineapple fusariose, acibenzolar-S-methyl
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