There are many species of fungi, bacteria, viruses and protozoa
commercially available for the biological control of insects,
diseases and weeds. Some products offer mixtures of different
organisms. This article will cover one particularly easy-to-use
type of fungi that occurs naturally in soil and helps control
soil diseases and break down crop residues to makes otherwise
unavailable soil nutrients available to plants—Trichoderma.
Trichoderma fungi have many positive effects on plants: increased
growth and yield, increased nutrient uptake, increased
fertilizer utilization efficiency, increased percentage and rate
of seed germination and induced systemic resistance to plant
diseases (Harman et al., 2004). Moreover, their use as biological
control agents is due to their modes of action: competition,
parasitism, production of inhibitory
compounds and enzymes or inactivation
of the pathogen’s enzyme
systems. Trichoderma actively take
over a root zone and make it difficult
for pathogens to compete for
space on the roots and for nutrients.
And in terms of parasitism,
Trichoderma coils around the hyphae of pathogenic fungi and
then produces enzymes to dissolve the pathogen’s cell walls.
There is another kind of beneficial fungi that is commercially
available to growers and also covers the roots to physically
prevent disease infection and make nutrients available to the
roots—Mycorrhizae. People often confuse the two fungi but
Mycorrhizal fungi are not parasitic like Trichoderma fungi.
Trichoderma fungi produce powerful enzymes to dissolve
crop residues and attack soil pathogens like Pythium,
Fusarium and Rhizoctonia. Trichoderma produces two main
types of enzymes: cellulase and chitinase. Cellulose is a major
There are many species of fungi, bacteria, viruses and protozoacommercially available for the biological control of insects,diseases and weeds. Some products offer mixtures of differentorganisms. This article will cover one particularly easy-to-usetype of fungi that occurs naturally in soil and helps controlsoil diseases and break down crop residues to makes otherwiseunavailable soil nutrients available to plants—Trichoderma.Trichoderma fungi have many positive effects on plants: increasedgrowth and yield, increased nutrient uptake, increasedfertilizer utilization efficiency, increased percentage and rateof seed germination and induced systemic resistance to plantdiseases (Harman et al., 2004). Moreover, their use as biologicalcontrol agents is due to their modes of action: competition,parasitism, production of inhibitorycompounds and enzymes or inactivationof the pathogen’s enzymesystems. Trichoderma actively takeover a root zone and make it difficultfor pathogens to compete forspace on the roots and for nutrients.And in terms of parasitism,Trichoderma coils around the hyphae of pathogenic fungi andthen produces enzymes to dissolve the pathogen’s cell walls.There is another kind of beneficial fungi that is commerciallyavailable to growers and also covers the roots to physicallyprevent disease infection and make nutrients available to theroots—Mycorrhizae. People often confuse the two fungi butMycorrhizal fungi are not parasitic like Trichoderma fungi.
Trichoderma fungi produce powerful enzymes to dissolve
crop residues and attack soil pathogens like Pythium,
Fusarium and Rhizoctonia. Trichoderma produces two main
types of enzymes: cellulase and chitinase. Cellulose is a major
การแปล กรุณารอสักครู่..
