Studies on sweetpotato with chlorotic leaf distortion, caused by fusarium lateritium

Document Type

Article

Publication Date

1-1-1996

Abstract

The response of sweetpotato to inoculation with the chlorotic leaf distortion (CLD) pathogen, Fusarium lateritium was investigated. Analyses included vine growth, canopy biomass, chlorophyll concentration, net photosynthetic rate and yield on CLD affected (CLD+) and CLD free (CLD‐) mericlones (clones derived from meristiem‐tip culture) of sweetpotato genotypes. Gentotype L82–527, showed delayed vine growth but overcame the delay in one of two sequential plantings while NC‐845, L85–237, L86–33, ‘Porto Rico’, ‘Jewel’ and ‘Beauregard’ were unaffected. Chlorotic, newly opened leaves on CLD+ plants had lower chlorophyll a and b concentrations and lower net photosynthetic rates. However, no reductions in net photosynthesis were observed when mature CLD+ leaves were measured; a few genotypes had lower chlorophyll content. Chlorotic leaf distortion did not lower marketable yields in any genotype. Our results suggest that only young foliage is adversely affected by CLD and that the photosynthetic potential is essentially regained in older leaves with no consequential effect on yield. © 1996 Taylor & Francis Group, LLC.

Publication Source (Journal or Book title)

International Journal of Pest Management

First Page

67

Last Page

70

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