Biological Control of White Rot Disease of Onion (Sclerotium cepivorum) by Trichoderma harzianum

1981 ◽  
Vol 100 (1) ◽  
pp. 29-35 ◽  
Author(s):  
T. H. Abd-El-Motty ◽  
M. N. Shatla
Keyword(s):  
Biological Control ◽  
Trichoderma Harzianum ◽  
White Rot ◽  
Sclerotium Cepivorum ◽  
Rot Disease

scholarly journals Biological Control of Onion White Rot Disease Caused by Sclerotium cepivorum

2017 ◽  
Vol 1 (2017) ◽  
pp. 101-102 ◽  
Author(s):  
Abdelnaser Elzaawely ◽  
Warda Hussain ◽  
Nabil El Sheery ◽  
Hassan El-Zahaby ◽  
Abdelwahab Ismail
Keyword(s):  
Biological Control ◽  
White Rot ◽  
Sclerotium Cepivorum ◽  
Rot Disease

scholarly journals PENGARUH KONSORSIUM AGENS HAYATI DAN JARAK TANAM TERHADAP KEJADIAN PENYAKIT BUSUK PUTIH (Sclerotium cepivorum Berk.) PADA BAWANG DAUN Influence of The Consortium of Biological Agents and Spacing to White Rot Disease (Sclerotium cepivorum Berk.) of Scallio

AgriPeat ◽  
2019 ◽  
Vol 20 (02) ◽  
pp. 92-98
Author(s):  
Admin Journal
Keyword(s):  
Block Design ◽  
Peat Soil ◽  
Nutrient Content ◽  
Biological Agents ◽  
White Rot ◽  
Plant Weight ◽  
Sclerotium Cepivorum ◽  
Trichoderma Sp ◽  
Rot Disease ◽  
Aspergillus Sp

ABSTRACTThis study aims to determine effective management patterns to control Sclerotium rot and to improvepeat soil fertility with the application of the Trichoderma sp + Aspergillus sp consortium.as biologicalagents and P solvents, combined with spacing arrangements in the cultivation of scallion in peatlands.The study used a factorial randomized block design consisting of two factors with four replications.Factor I Application of biological agents consists of: A0 = No biological agents; A1 = Consortium ofTrichoderma sp. + Aspergillus sp; Factor II Plant spacing, consisting of J1 = 20x25 cm; J2 = 25x25cm and J3 = 30x25 cm. The results showed that the interaction treatment of Trichoderma sp. +Aspergillus sp. and spacing of 25x25 cm effectively suppresses the incidence of white rot disease(Sclerotium cepivorum Berk) up to 34.02%, while at a spacing of 20x25 cm with the application ofTrichoderma sp. + Aspergillus sp. produced the highest fresh plant weight of 8.80 kg plot-1 or 24.44tons hectares-1. Increasing the number of leaves is only influenced by a single factor of biologicalagents (23.29%) and spacing of 25x25 cm (19.7%). Application of Trichoderma sp. + Aspergillus sp.can increase the nutrient content of N, P (total and available), K and peat soil organic matter.Consortium of biological agents Trichoderma sp. and Aspergillus sp. indigenous have the potential tobe developed as biological agents and biofertilizers, with optimum spacing can be applied to themanagement of scallion cultivation in peatlands.Key words: Sclerotium cepivorum Berk, scallion, Trichoderma sp. and Aspergillus sp., spacing

Field Screening for Onion White Rot Resistance

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 534d-534
Author(s):  
Ronald Voss ◽  
Kent Brittan ◽  
Herb Phillips ◽  
Donald Kirby ◽  
W.Michael Davis ◽  
...  
Keyword(s):  
Disease Incidence ◽  
Significant Loss ◽  
White Rot ◽  
Field Screening ◽  
Disease Expression ◽  
Sclerotium Cepivorum ◽  
Crop Resistance ◽  
Production Problem ◽  
Clean Seed ◽  
Rot Disease

Onion white rot disease (Sclerotium cepivorum) is a serious production problem throughout the world. Very low pathogen level in the soil can cause significant loss. Generic integrated pest management programs include clean seed, site selection, sanitation, crop rotation, biological and chemical controls, crop resistance to the pest, and other components. Onion white rot disease management currently does not have crop resistance as a component. The lack of resistant germplasm and/or the inability to identify and screen potentially resistant germplasm are primary reasons. Research was conducted to determine if field screening for resistance is feasible, to define field screening methodology, and to identify and/or quantify resistance. Disease incidence was inconsistent from year to year. In some years, disease expression was high; in others, disease was low. Uniform pathogen level and disease expression throughout the experimental field were required for successful screening. Results provide evidence that “resistant” or “tolerant” germplasm does exist, and that disease “resistance”, “tolerance”, or “susceptibility” can vary from slight to strong, suggesting multigenic involvement. “Resistance”/”tolerance” was identified in long-day yellow hybrids and inbreds. `Southport White Globe' selections and derivatives had much higher disease susceptibility than yellow or brown skin lines screened.

ENHANCEMENT OF GROWTH OF ONION (ALLIUM CEPA L.) BY BIOLOGICAL CONTROL AGENT TRICHODERMA SPP

2001 ◽  
Vol 49 (4) ◽  
pp. 393-395 ◽  
Author(s):  
E. PAYGHAMI ◽  
S. MASSIHA ◽  
B. AHARY ◽  
M. VALIZADEH ◽  
A. MOTALLEBI
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Trichoderma Viride ◽  
Control Agent ◽  
White Rot ◽  
Trichoderma Spp ◽  
Sclerotium Cepivorum ◽  
Randomized Design ◽  
Allium Cepa L ◽  
Significant Difference

The effect of Trichoderma harzianum and Trichoderma viride (isolated from mycoflora in the rhizosphere of onion) in increasing the growth of onion was studied in a completely randomized design in pots with 12 replications under greenhouse conditions at 21°C with a 12-h light/dark cycle (fluorescent and incandescent lighting). The biological control of Sclerotium cepivorum Berk, the causal agent of white rot of onion, was also investigated in this experiment. The addition of Trichoderma spp. to autoclaved soil (inoculation of 2/3 of the top soil in the pots with 4% (v/v) inoculum of T. harzianum and T. viride) significantly increased the growth and fresh weight of the onion plants (P=1%). The biological control of S. cepivorum was achieved with T. harzianum and T. viride, but no significant difference was observed between the two species.

scholarly journals Comparison of the behaviour of a transformed hygromycin resistant strain of Trichoderma atroviride (M1057hygR) with the wildtype strain (M1057)

2004 ◽  
Vol 57 ◽  
pp. 72-76 ◽  
Author(s):  
K.L. McLean ◽  
S.L. Dodd ◽  
B.E. Sleight ◽  
R.A. Hill ◽  
A. Stewart
Keyword(s):  
Biological Control ◽  
Biological Control Agent ◽  
Field Studies ◽  
Control Agent ◽  
White Rot ◽  
Trichoderma Atroviride ◽  
Wildtype Strain ◽  
Sclerotium Cepivorum ◽  
Significant Difference ◽  
Rhizosphere Competence

The biocontrol isolate Trichoderma atroviride M1057 and a transformed hygromycin resistant biotype (M1057hygR) were compared using biological control rhizosphere competence and antibiosis studies to determine whether the transformed biotype performed in a similar manner to the wildtype strain In an onion growth chamber trial using soil naturally infested with the onion white rot pathogen Sclerotium cepivorum there was no significant difference (P>005) in the level of disease control given by the two T atroviride strains Similarly populations of T atroviride M1057 and M1057hygR were equivalent (P>005) in the rhizosphere of onion seedlings There was no significant difference (P>005) between the mycelial growth rates of S cepivorum when grown on agar amended with culture filtrate of T atroviride M1057 and M1057hygR Thus T atroviride M1057hygR has similar biological attributes to the wildtype isolate and can be used in future field studies looking at the population ecology of the biological control agent

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