INVESTIGATION ON BIOCONTROL OF CROWN AND ROOT ROT OF SUNFLOWER (SCLEROTINIA SCLEROTIORUM) BY TRICHODERMA SPECIES IN LABORATORY CONDITION

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ABDOLLAHZADEH J.; MOHAMMADI GOLTAPEH E.; ROUHANI HAMID

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Journal: Year:2006 | Volume:12 | Issue:1 Page(s): 43-56

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Title

INVESTIGATION ON BIOCONTROL OF CROWN AND ROOT ROT OF SUNFLOWER (SCLEROTINIA SCLEROTIORUM) BY TRICHODERMA SPECIES IN LABORATORY CONDITION

Author(s)

ABDOLLAHZADEH J. | MOHAMMADI GOLTAPEH E. | ROUHANI HAMID | Issue Writer Certificate

Keywords

SCLEROTINIA SCLEROTIORUMQ3

TRICHODERMAQ3

BIOLOGICAL CONTROLQ2

CROWN AND ROOT ROTQ2

Abstract

In order to control of S. sclerotiorum, the causal agent of CROWN AND ROOT ROT of sunflower biologically, nine highly effective TRICHODERMA isolates were selected. Two (J1 & J2) and three isolates (J3, J4 & J5) of T. harzianum were isolated from sunflower field soil of Ormiah and Khoy respectively. T. virens, T. harzianum (J6), T. viride (E1) and T. viride (E2) on the other hand were isolated from edible fungi substrate.The above mentioned isolates were evaluated for parasitism, competitive saprophytic ability, inhibition effects of volatile metabolites and culture filtrates and colonization compact on S. sclerotiorum. Microscopic studies showed that all of the isolates disintegrated hypha of S. sclerotiorum through antibiosis mechanism. In addition, T. harzianum (J1 & J2) and T. viride (E1 & E2) hypha grew towards and coiled around the S. sclerotiorum hypha. Dense coils of hypha and degradation of the Sclerotinia hyphae were observed in other stages of the parasitism. Furthermore, T. harzianum (J1) forming short branches and appressorium-like structures which aided in holding and penetrating the host cell wall. In competitive saprophytic ability test, T. virens and T. harzianum (J6) performed more effective than the others, so that, after 5 and 6 days both covered the whole colony surface, respectively, and prevented from forming sclerotium. In colonization ability test, T. harzianum (J1) and T. harzianum (J6) performed more effective than the other isolates, therefore, after 6 and 8 days both were covered the whole colony surface, respectively and prevented from forming sclerotium. In volatile antibiotics test by means of superposal petri-dishes method, T. harzianum (J1) was the most effective isolates which inhibited the mycelial growth of S. sclerotiorum by 77.77%. In non-volatile antibiotics i.e. Culture filtrates effect test on inhibition of mycelial growth, T. harzianum (J6) was more effective to inhibit the mycelial growth by 78.88%. It delayed the myceliogenic germination of sclerotia of S. sclerotiorum more effectively than the other isolates.

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APA: Copy

ABDOLLAHZADEH, J., MOHAMMADI GOLTAPEH, E., & ROUHANI, HAMID. (2006). INVESTIGATION ON BIOCONTROL OF CROWN AND ROOT ROT OF SUNFLOWER (SCLEROTINIA SCLEROTIORUM) BY TRICHODERMA SPECIES IN LABORATORY CONDITION. JOURNAL OF AGRICULTURAL SCIENCES, 12(1), 43-56. SID. https://sid.ir/paper/7677/en

Vancouver: Copy

ABDOLLAHZADEH J., MOHAMMADI GOLTAPEH E., ROUHANI HAMID. INVESTIGATION ON BIOCONTROL OF CROWN AND ROOT ROT OF SUNFLOWER (SCLEROTINIA SCLEROTIORUM) BY TRICHODERMA SPECIES IN LABORATORY CONDITION. JOURNAL OF AGRICULTURAL SCIENCES[Internet]. 2006;12(1):43-56. Available from: https://sid.ir/paper/7677/en

IEEE: Copy

J. ABDOLLAHZADEH, E. MOHAMMADI GOLTAPEH, and HAMID ROUHANI, “INVESTIGATION ON BIOCONTROL OF CROWN AND ROOT ROT OF SUNFLOWER (SCLEROTINIA SCLEROTIORUM) BY TRICHODERMA SPECIES IN LABORATORY CONDITION,” JOURNAL OF AGRICULTURAL SCIENCES, vol. 12, no. 1, pp. 43–56, 2006, [Online]. Available: https://sid.ir/paper/7677/en

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