Articles
INTERACTIONS BETWEEN GROWING MEDIA AND BIOCONTROL AGENTS IN CLOSED HYDROPONIC SYSTEMS
Article number
891_4
Pages
51 – 57
Language
English
Abstract
Biological control is an environmentally sound alternative for the control of root diseases in closed hydroponic systems.
The effect of biological control agents (BCA) under greenhouse and field conditions, however, is frequently inconsistent.
The aim of the current investigations was to study the effect of two different growing media, peat and pumice, on the performance of two commercial biocontrol agents, Binab T with Trichoderma polysporum and Trichoderma harzianum as active strains and Mycostop with Streptomyces griseoviridis as active strain against root pathogens Pythium aphanidermatum (PA) and Phytophthora cryptogea (PC). Tomato was used as a model plant.
Investigations were carried out in a climate chamber as well as in the greenhouse.
In the climate chamber, disease control varied with respect to the biocontrol agents and the type of the pathogen present in the system.
Amendment of Binab T or Mycostop reduced the amount of the added pathogens in the cultivation system.
Mycostop was the most effective biocontrol agent when pumice was used while Binab T was the most effective agent in peat.
In the greenhouse, both Binab T and Mycostop showed good biocontrol activity at an early stage of the cultivation period but this activity decreased as the plants became older.
The effect of biological control agents (BCA) under greenhouse and field conditions, however, is frequently inconsistent.
The aim of the current investigations was to study the effect of two different growing media, peat and pumice, on the performance of two commercial biocontrol agents, Binab T with Trichoderma polysporum and Trichoderma harzianum as active strains and Mycostop with Streptomyces griseoviridis as active strain against root pathogens Pythium aphanidermatum (PA) and Phytophthora cryptogea (PC). Tomato was used as a model plant.
Investigations were carried out in a climate chamber as well as in the greenhouse.
In the climate chamber, disease control varied with respect to the biocontrol agents and the type of the pathogen present in the system.
Amendment of Binab T or Mycostop reduced the amount of the added pathogens in the cultivation system.
Mycostop was the most effective biocontrol agent when pumice was used while Binab T was the most effective agent in peat.
In the greenhouse, both Binab T and Mycostop showed good biocontrol activity at an early stage of the cultivation period but this activity decreased as the plants became older.
Authors
S. Khalil, M. Hultberg, B.W. Alsanius
Keywords
tomato, Trichoderma harzianum, Trichoderma polysporum, Streptomyces griseoviridis, Pythium aphanidermatum, Phytophthora cryptogea, pumice, peat
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