scholarly journals Crops that decrease the survival rate of sclerotia of Sclerotium cepivorum Berkeley in their root systems and attenuate the progress of white rot disease

2021 ◽  
Vol 63 (0) ◽  
pp. 39-45
Author(s):  
Hiroyuki Iyozumi ◽  
Naoya Okamoto ◽  
Fuyumi Takahashi ◽  
Ayaka Terada
Keyword(s):  
Survival Rate ◽  
Root Systems ◽  
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

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

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.

scholarly journals Biological control of garlic (Allium) white rot disease using antagonistic fungi-based bioformulations

2015 ◽  
Vol 55 (2) ◽  
pp. 136-141 ◽  
Author(s):  
Razak Mahdizadehnaraghi ◽  
Asghar Heydari ◽  
Hamid Reza Zamanizadeh ◽  
Saeed Rezaee ◽  
Jafar Nikan
Keyword(s):  
Rice Bran ◽  
Control Method ◽  
Control Measure ◽  
Fungal Species ◽  
White Rot ◽  
Sclerotium Cepivorum ◽  
Common Control ◽  
Talaromyces Flavus ◽  
Rot Disease ◽  
Almost All

Abstract White rot disease caused by Sclerotium cepivorum is a major yield reducing fungal disease of garlic found throughout the world, including Iran. The use of chemical fungicides is the most common control method for the disease at the present time. This control measure is costly, contaminates the environment, and harms non-target organisms. Moreover, since the pathogen is soil-borne, chemical control strategy is not quite effective against the disease. In this study, we tried to develop and prepare some new bioformulations based on three antagonistic fungal species: Trichoderma harzianum, T. asperellum, and Talaromyces flavus. Six isolates of the above-mentioned fungi were used along with the organic and inorganic carriers, rice bran and talc, to develop twelve new bioformulations. The effectiveness of the bioformulations were then evaluated in the control of garlic white rot disease in the greenhouse conditions in comparison with the healthy control, infected control, and the commonly used fungicide Carbendazim. The design of the experiment was completely randomised. There were 15 treatments each, with four replicates. The results of the greenhouse experiments indicated that almost all the developed bioformulations resulted in significant reductions (34.50 to 64.50%) in the incidence of white rot disease. In general, bioformulations which contained the organic carrier (rice bran) performed more effectively than those that contained the inorganic carrier (talc). Bioformulations which contained an organic carrier (rice bran) were as effective as the fungicide Carbendazim.

scholarly journals Antifungal activity and resistance induction against Sclerotium cepivorum by plant growth-promoting fungi in onion plants

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Mohsen Mohamed Elsharkawy ◽  
Nagwa Mohamed Mohamed El-Khateeb
Keyword(s):  
Plant Growth ◽  
Dry Weight ◽  
White Rot ◽  
Growth Enhancement ◽  
Sclerotium Cepivorum ◽  
Dual Cultures ◽  
Defence Genes ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Rot Disease

Abstract The influence of the inoculation with plant growth-promoting fungi (PGPF) isolates on growth enhancement of onion plants and progress of white rot disease in onions, caused by Sclerotium cepivorum, was evaluated. The tested PGPF isolates were Phoma sp. GS8-1, Phoma sp. GS 8-3, Trichoderma asperellum SKT-1, Fusarium equiseti GF18-3 and Penicillium simplicissmum GP17-2. Abnormal shape and lysis in the mycelia of the pathogen were reported in dual cultures of PGPF and S. cepivorum using scanning electron microscopy. The germination of sclerotia was reduced after soaking in culture filtrates of PGPF. The highest reduction was recorded in P. simplicissmum GP17-2 treatment (70.85%). The results demonstrated that the treatments with PGPF isolates significantly enhanced the plant height, root length, bulb perimeter and plant dry weight. Additionally, PGPF clearly reduced disease severity of white rot disease of onions. Among PGPF isolates, T. asperellum SKT-1 and P. simplicissmum GP17-2 showed the best effects in reducing the incidence and severity of white rot and enhancing onion growth. On the other hand, the levels of peroxidase and polyphenol oxidase were improved in the treated onion plants than in the untreated plants at 7 days after induction treatments. Similarly, early and strong expressions of defence genes, PR1 and PR2, were reported in plants treated with PGPF. Overall, this research suggested that PGPF treatments generated favourable effects on the suppression of white rot disease of onions.

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