Induction of defence response in strawberry plants to root-rot disease using some bioagents
EI-Fiki, A.I.I.
Induction of defence response in strawberry plants to root-rot disease using some bioagents [electronic resource]. استخدام المقاومة نباتات الفراولة ضد مرض عفن الجذور باستخدام بعض العوامل الحيوية. - p.bo13-22
Includes references.
To control strawberry root rot complex is common and increasing problem in perennial strawberry plantings worldwide. In many cases the causes of root rot were not detected or it was referred to several pathogens (MoroCko, 2006). Rhizoctonia so/ani Kuhn and R . .fragarlae play a very important role in strawberry root rot (D'Ercole, 1993). Incidences of infection of plants by potentially damaging pathogenic fungi included 13-42% with Sclerotium rolftii, 15-96% with Fusariumoxysporum, 4-17% with Macrophomina phaseolina, 17-42% with Pythium aphanidermatum and 67-92% with Rhizoctonia so/ani. In general, the high incidence of pathogenic fungi, especially S rolftii, F. oxysporum, P. aphanidermatum, and R so/ani, and the severity of root disease caused by them was undoubtably contributed to poor plant growth, early plant mortality, and low yields at Gainesville, USA (Locascio et al., 1999). Biological control of soilborne pathogens by introduced microorganisms has been studied for over 65 years, but during most of that time it has not been considered comercially feasible. Since about 1965, however, interest and research in this area have increased steadily, as reflected by the number of books and reviews about it that have appeared. Concurrently, there has been a shift to the opinion that biological control can have an important role in agriculture in the future, and it is encouraging that several companies now have programs to develop biocontrol agents as commercial products (Weller, 1988). Biological control visualizes a control of disease with the help of living organisms. ht case of root disease, organisms occur in soil which suppress the activity of disease fungi (Mehrotra and Caludius, 1972). Two bacterial isolates and one strain of Trichoderma harzianum were tested alone and in combination with chitin for efficacy in the control of root rot disease caused by Phytophthora capsici and Rhizoctonia so/ani in pepper plants under greenhouse conditions. ht in vitro assays, B. subtilis and T. harzianum were antagonistic against P. capsici and R so/ani and produced high levels of chitinase. B. licheniformis and T. harzianum reduced Rhizoctonia-rot. Reduction of root rot disease was accompanied by increased yield (SidAhmed et al., 2003). A combination of two compatible micro-organisms, i.e. Trichoderma harzianum and Streptomyces rochet, both antagonistic to the pathogen Phytophthora capsici, was used to control root rot in pepper.
Summary in Arabic.
Strawberries--Diseases and pests--Control.
Root rots--Biological control.
Deficiency diseases in plants.
Induction of defence response in strawberry plants to root-rot disease using some bioagents [electronic resource]. استخدام المقاومة نباتات الفراولة ضد مرض عفن الجذور باستخدام بعض العوامل الحيوية. - p.bo13-22
Includes references.
To control strawberry root rot complex is common and increasing problem in perennial strawberry plantings worldwide. In many cases the causes of root rot were not detected or it was referred to several pathogens (MoroCko, 2006). Rhizoctonia so/ani Kuhn and R . .fragarlae play a very important role in strawberry root rot (D'Ercole, 1993). Incidences of infection of plants by potentially damaging pathogenic fungi included 13-42% with Sclerotium rolftii, 15-96% with Fusariumoxysporum, 4-17% with Macrophomina phaseolina, 17-42% with Pythium aphanidermatum and 67-92% with Rhizoctonia so/ani. In general, the high incidence of pathogenic fungi, especially S rolftii, F. oxysporum, P. aphanidermatum, and R so/ani, and the severity of root disease caused by them was undoubtably contributed to poor plant growth, early plant mortality, and low yields at Gainesville, USA (Locascio et al., 1999). Biological control of soilborne pathogens by introduced microorganisms has been studied for over 65 years, but during most of that time it has not been considered comercially feasible. Since about 1965, however, interest and research in this area have increased steadily, as reflected by the number of books and reviews about it that have appeared. Concurrently, there has been a shift to the opinion that biological control can have an important role in agriculture in the future, and it is encouraging that several companies now have programs to develop biocontrol agents as commercial products (Weller, 1988). Biological control visualizes a control of disease with the help of living organisms. ht case of root disease, organisms occur in soil which suppress the activity of disease fungi (Mehrotra and Caludius, 1972). Two bacterial isolates and one strain of Trichoderma harzianum were tested alone and in combination with chitin for efficacy in the control of root rot disease caused by Phytophthora capsici and Rhizoctonia so/ani in pepper plants under greenhouse conditions. ht in vitro assays, B. subtilis and T. harzianum were antagonistic against P. capsici and R so/ani and produced high levels of chitinase. B. licheniformis and T. harzianum reduced Rhizoctonia-rot. Reduction of root rot disease was accompanied by increased yield (SidAhmed et al., 2003). A combination of two compatible micro-organisms, i.e. Trichoderma harzianum and Streptomyces rochet, both antagonistic to the pathogen Phytophthora capsici, was used to control root rot in pepper.
Summary in Arabic.
Strawberries--Diseases and pests--Control.
Root rots--Biological control.
Deficiency diseases in plants.