Trichoderma harzianum (TrH 40) isolated from soil samples from rambutan orchards (Nephelium lappaceum) had antagonistic effects against three postharvest pathogens of rambutan:Botryodiplodia theobromae Colletotrichum gloeosporioides andGliocephalotrichum microchlamydosporum causative fungi of stem end rot anthracnose and brown spot respectively Capacidad antagnica de Trichoderma harzianum frente a showed that T harzianum presents a high antagonistic activity and hyperparasitica against Rhizotocnia The greater action of mycoparasitism arose with Rhizotocnia being very frequent the curl of hyphae and penetration in Nakataea only curl was observed and no curl was observed in Sclerotium The development of strain of T

Trichoderma harzianum and on its possible antagonistic

strain of Trichoderma harzianum and on possible antagonistic activity of the treated fungus against Fusarium oxysporum For compatibility study each pesticide was tested at seven concentrations using poisoned food technique While for the antagonistic activity study treated T harzianum was tested against F oxysporium using dual culture technique under laboratory conditions Significant

Trichoderma dploie d'ailleurs les mcanismes suivants pour tenir ses adversaires en chec : Mycoparasitisme : l'antagoniste attaque le pathogne en perant les hyphes et en les envahissant Trichoderma pntre dans les hyphes de Rhizoctonia Solani par lyse des parois au moyen des enzymes glucanases et chitinase 14 Antibiose : Trichoderma exerce une action fongistatique

Trichoderma harzianum in Egyptian soil M I Ali1 M M Yasser2 A S Mousa2 run parallel with strain improvement (Handelsman and Stabb 1996 Larkin et al 1998) Also many investigators suggested that the conditions must be optimized to obtain maximum inhibition of the pathogenic organism by the action of other antagonistic microorganisms (Cook and Baker 1983) Most of such studies

19/03/2016Organism Trade Name Target Crops Trichoderma virens SoilGard 12G3 Pythium Rhizoctonia and Root rots Ornamental and food crop plants grown in greenhouses Trichoderma harzianum Rifai strain KRL-AG3 Plant Shield HC Fusarium Pythium and Rhizoctonia Cucurbit vegetables flowers bedding plants Trichoderma harzianum Rifai strain KRL-AG2 T-22™ HC

02/06/2017Antagonistic Action of Trichoderma Isolates against Fusarium oxysporum f sp lycopersci Akash Tomar1* Trichoderma harzianum Trichoderma viride and Trichoderma koningii Morphological identification In recent years biological control of soil borne plant pathogens is very popular (Hanafi 2003 Giotis et al 2009) Successful reductions of Fusarium wilt in many crops with

Peptaibols from Trichoderma asperellum TR356 strain

Strain maintenance and spore solution For Trichoderma strain maintenance 3 mm diameter discs originating from culture plates were periodically transferred to new Petri dishes containing MYG medium [5 g L-1 of malt extract (Biobrs) 2 5 g L-1 of yeast extract (Acumedia) 10 g L-1 of glucose (Sigma-Aldrich) and 20 g L-1 of agar (Kasvi)] After sporulation the spores were stored in 0 9% (w

Trichoderma harzianum TF3 a propiconazole-resistant strain with the ability of survival at relatively high densities in the phylloplane of tomato and grapevine and high antagonistic potential against Botrytis cinerea on these crops was transformed to hygromycin B resistance by high-voltage electric pulse with the vector pHATα (a derivative of pAN7-1) containing the hygromycin B

Several Trichoderma strains have been reported to be effective in controlling plant diseases and the action of fungal hydrolytic enzymes has been considered as the main mechanism involved in the antagonistic process However although Trichoderma strains were found to impair development of Crinipellis perniciosa the causal agent of cocoa plant witches' broom disease no fungal strain is

ABSTRACT Novel Trichoderma harzianum isolate NVTH2 effective against Fusarium oxysporum f sp gerberae (FOG) causing wilt in Gerbera showed growth tolerance against azoxystrobin 23 % SC kresoxim methyl 44 3% SC and carbendazim 50% WP at all the tested concentrations (50ppm 100 ppm 250 ppm 500 ppm 1000 ppm 1500 ppm and 2000 ppm) followed by fosetyl Al 50% WP

17/08/2004Strains T atroviride strain P1 ("Trichoderma harzianum" ATCC 74058) was used throughout this study and was maintained on potato dextrose agar (PDA) (Merck Darmstadt Germany) The glucose oxidase-producing strain used in these experiments (T atroviride SJ3-4) has in general been described previously and was shown to produce the highest glucose oxidase activity of all

Three strains were used: Trichoderma harzianum Rifai strain A-34 Trichoderma harzianum Rifai strain A-53 and Trichoderma viride Persoon strain TS-3 from the Center for Reproduction for Biological Control (CREE) of Ciudad Jardn Agricultural Company of Holguin

The antagonistic action of endophytes against the phytopathogen F oxysporum was evaluated by the dual culture method described by Campanile et al (2007) and outlined by Orlandelli et al (2015) Triplicates remain incubated at 28 C for 7 days and then were photographed and assessed for pathogen area results were then compared to those obtained for the controls

than one mechanism of action Therefore the present study was conducted to evaluate the antagonistic potential of seven different Trichoderma species viz Trichoderma viride T harzianum T reesei T atroviride T pseudokoningii T koningii and T virens in inhibiting the growth of some most widely occurring soil inhabiting plant pathogens viz Fusarium oxysporum f sp lycopersici

A Novel Strain for the Managements of Plant Diseases

T harzianum s str T atroviride T longibrachiatum and T asperellum (Hermosa et al 2000) Coevolution of organisms antagonistic to pathogens results in many Trichoderma strains being inactive against fungi other than those against which they were originally selected This is strongly advantageous in that they are less likely

Development of new effective biocontrol agents is largely based on the antagonistic capacity of candidate agents against targeted pathogens in vitro Different mechanisms contribute to such capacity including the activity of cell wall-degrading enzymes secretion of antimicrobial secondary metabolites growth vigour and resistance to exogenous and endogenous toxins

Trichoderma harzianum in Egyptian soil M I Ali1 M M Yasser2 A S Mousa2 run parallel with strain improvement (Handelsman and Stabb 1996 Larkin et al 1998) Also many investigators suggested that the conditions must be optimized to obtain maximum inhibition of the pathogenic organism by the action of other antagonistic microorganisms (Cook and Baker 1983) Most of such studies

Several Trichoderma strains have been reported to be effective in controlling plant diseases and the action of fungal hydrolytic enzymes has been considered as the main mechanism involved in the antagonistic process However although Trichoderma strains were found to impair development of Crinipellis perniciosa the causal agent of cocoa plant witches' broom disease no fungal strain is

(Howell 1998) The effectiveness of certain Trichoderma harzianum isolates to act against Gaeumannomyces gra-minis var tritici has been related to the production of pyrone-like antibiotics (Ghisalberti et al 1990) On the other hand studies on the mechanisms of action used by Trichoderma virens indicate that the stimulation of plant

Several Trichoderma strains have been reported to be effective in controlling plant diseases and the action of fungal hydrolytic enzymes is considered as the main mechanism involved in the antagonistic process Strain Trichoderma harzianum T334 is a potential biocontrol agent against plant pathogenic fungi with the ability to produce low levels of proteases constitutively To improve its