Effect of foliar fertilizer application in reducing the severity of papaya ringspot caused by Papaya ringspot virus (PRSV) in papaya (Carica papaya L.)

Date

2013

Degree

Bachelor of Science in Agriculture

Major Course

Major in Plant Pathology

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Filomena C. Sta. Cruz

Abstract

Abstract: The effect of supplemental foliar fertilizer application in reducing the severity of papaya ringspot caused by Papaya ringspot virus (PRSV) in papaya was determined. Two-month old papaya seedlings were mechanically inoculated with PRSV. Foliar fertilizer was applied once at different weeks after inoculation (wpi), wherein plants had varying degree of symptom severity ranging from the mildest symptom of mottling (at 2 wpi), mosaic (at 3 wpi) to a more severe symptom of mosaic with leaf deformation (at 4 wpi). Repeated foliar fertilizer application at 2 wpi, 3 wpi and 4 wpi was also done. Generally, foliar fertilizer regardless of timing and frequency of application had no significant effect in reducing the severity of papaya ringspot. However, a consistent slight reduction in symptom severity was observed in foliar fertilized compared with unfertilized plants. This result was evident in plants fertilized during the early stages of infection (at 2 and 3 wpi) and with repeated fertilizer application when symptoms were mild, but not at later stages when symptoms were more severe.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2013 A3 /M35

Notes

soource: ilib only

Document Type

Thesis

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