Articles
EFFECTS OF SOIL ORGANIC AMENDMENTS AND INCUBATION TEMPERATURE ON THE CONTROL OF FUSARIUM OXYSPORUM F. SP. ASPARAGI
Article number
883_46
Pages
369 – 376
Language
English
Abstract
Soil mixture (sand:silt, 2:1, v:v) was artificially infested with Fusarium oxysporum f. sp. asparagi (Foa) and thereafter amended with either poultry manure (PM, 1 and 2%, w:w), the pellet of PM (PMP, 1 and 2%, w:w), or composted olive residues (COR, 3 and 6%, w:w). Thoroughly homogenised soil was used to fill 50 ml tubes which were incubated at 30 and 35°C in the dark for 15, 30 or 45 d.
Thereafter, the remaining soil in the tubes was individually added to growth substrate in pots where seedlings of the susceptible asparagus Grande were planted.
Foa viability was reduced by >90% in PMP-1-2% and PM-2% amended soils incubated at 30°C for 45 d; similar results were obtained when soils amended with PM, PMP or COR, or non-amended, were incubated at 35°C for ≥30 d.
Root rot severity (% affected tissues) was reduced to 35 and 22%, as compared to their control plants, respectively growing on the PM- and PMP-treated pots, which were incubated at 30°C for 45 d.
Foa-infested soil amended with PMP-2% and incubated at 30°C for 30 or 45 d determined a 325% increase of fresh plant weight, as compared to the un-amended Foa-infested control, whereas increases of 58 and 32% were observed in plants growing in un-infested PM and COR-amended soils that were incubated at 35°C for 15 d.
In general, 45-d incubation reduced inoculum viability and root severity and improved plant biomass, but these effects were larger at 35°C than at 30°C.
Thereafter, the remaining soil in the tubes was individually added to growth substrate in pots where seedlings of the susceptible asparagus Grande were planted.
Foa viability was reduced by >90% in PMP-1-2% and PM-2% amended soils incubated at 30°C for 45 d; similar results were obtained when soils amended with PM, PMP or COR, or non-amended, were incubated at 35°C for ≥30 d.
Root rot severity (% affected tissues) was reduced to 35 and 22%, as compared to their control plants, respectively growing on the PM- and PMP-treated pots, which were incubated at 30°C for 45 d.
Foa-infested soil amended with PMP-2% and incubated at 30°C for 30 or 45 d determined a 325% increase of fresh plant weight, as compared to the un-amended Foa-infested control, whereas increases of 58 and 32% were observed in plants growing in un-infested PM and COR-amended soils that were incubated at 35°C for 15 d.
In general, 45-d incubation reduced inoculum viability and root severity and improved plant biomass, but these effects were larger at 35°C than at 30°C.
Publication
Authors
A. Borrego-Benjumea, J.M. Melero-Vara, M.J. Basallote-Ureba
Keywords
asparagus crown and root rot, composted olive residues, cultural practices, pellet of poultry manure, poultry manure
Online Articles (52)