Dry flowable formulations of antagonistic Bacillus subtilis strain T429 by spray drying to control rice blast disease

Meng, Xiangkun; Yu, Junjie; Yu, Mina; Yin, Xiuli; Liu, Yongfeng

doi:10.1016/j.biocontrol.2015.03.004

Cited by 34 publications

(14 citation statements)

References 27 publications

(19 reference statements)

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“…However, the application of B. subtilis and Apron star on infected rice seed were more effective in reducing the percentage of infected seeds detected than T. asperellum and hot water treatments (Figure 1 and 2). Similar effect of Bacillus spp and chemical fungicide on controlling rice blast disease has previously been documented (Shan et al, 2013;Meng et al, 2015). In this study, seeds treated with microbial agents and hot water reduced the percentage of P. oryzae infected rice seeds by 4.3 to 52.7% compared to the negative control.…”

Section: Discussionsupporting

confidence: 84%

Reduction of initial occurrence of rice blast (Pyricularia oryzae) inocula on seeds by microbial and hot water seed treatments

Mamiro¹,

Mabagala²,

Tefera³

2019

Aust J Crop Sci

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Rice blast disease resulting from infected rice seed can be avoided by using treated seeds. Seed treatment using chemical fungicide has many limitations such as development of resistance to pathogens, damage to the natural environment and the health of farmers and consumers. Such limitations have raised the need for alternative non-chemical seed treatment methods such as antagonist microbial agents and hot water. Laboratory and the screen house experiments were carried out with the aim of evaluating the efficacy of Trichoderma asperellum, Bacillus subtilis and hot water (50°C/15 min) seed treatments against rice blast disease inocula on rice seeds. The results showed that, seeds treated with microbial agents (T. asperellum, B. subtilis) and hot water reduced the percentage of infected rice seeds by 4.3 to 52.7% relative to non-treated seeds. The germination percent and seedling vigour index increased from 12.3 % to 17.1 %. Rice seeds treated with B. subtilis reduced the incidence and severity of rice blast disease from 10% to 72.4 %. Seed treatment using B. subtilis followed by T. asperellum were the best in reducing the number of infected seeds and rice blast disease incidence and severity on rice seedlings. Therefore, the use of these microbial agents has a potential for effective management of rice blast disease.

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Section: Discussionsupporting

confidence: 84%

Reduction of initial occurrence of rice blast (Pyricularia oryzae) inocula on seeds by microbial and hot water seed treatments

Mamiro¹,

Mabagala²,

Tefera³

2019

Aust J Crop Sci

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“…Fermentation broth I-1, II-1, and III-1 indicate the dry flowable formulations of freeze-dried powder of C. rosea fermentation broth containing 7.5, 15 and 22.5% fermentation broth, respectively. spray drying technique was successfully applied for the microencapsulation and dry flowable granular production of bio-insecticides such as Lactobacillus plantarum (Rajam and Anandharamakrishnan 2015), Trichoderma harzianum (Munoz-Celaya et al 2012), B. thuringiensis (Zhou et al 2008), B. subtilis B99-2 (Ma et al 2015), and B. subtilis strain T429 (Meng et al 2015). In the present study, the C. rosea conidia powder and its fermentation broth were mixed to produce the C. rosea dry flowable formulation using spray drying technology.…”

Section: Discussionmentioning

confidence: 99%

Preparation of dry flowable formulations of Clonostachys rosea by spray drying and application for Sclerotinia sclerotiorum control

Sun

Liu³

et al. 2018

Journal of Integrative Agriculture

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A dry flowable formulation of Clonostachys rosea with fungicidal activity against Sclerotinia sclerotiorum was prepared by spray drying. The formulation was optimized by a four-factor, three-level orthogonal experiment to screen inert ingredients and spray-drying conditions. The optimal dry flowable formulation of C. rosea included 30% C. rosea (ratio of conidia powder and its fermentation broth is 1:3), 3% Morwet EFW, 4% k12, 10% Morwet D425, 9% sodium salt of polynaphthalene sulphonic acid (NNO), 5% croscarmellose sodium, 5% (NH 4) 2 SO 4 , 0.5% carboxymethyl cellulose sodium (CMC-Na), 1% oxalic acid and palygorskite (carrier) up to 100%. The formulation exhibited good physical characteristics, such as high dispersibility, viability and a long shelf life. Plate antagonism tests and pot trials indicated that the dry flowable formulation was very effective against S. sclerotiorum, with control efficiency of up to 88.30%. This dry flowable formulation of C. rosea is a new potential commercial fungicide for spray drying to control S. sclerotiorum.

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“…Impressive reports are available for other species of microorganisms. For example, dry flowable formulations of Bacillus subtilis strain T429 were effective in controlling rice blast with an efficiency of up to 78.5% . Bacillus methylotrophicus BC79 culture filtrate showed an 84.8% biocontrol effect for M. oryzae .…”

Section: Discussionmentioning

confidence: 99%

Isolation and evaluation of endophytic Streptomyces endusOsiSh‐2 with potential application for biocontrol of rice blast disease

Zeng

et al. 2016

J Sci Food Agric

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Dry flowable formulations of antagonistic Bacillus subtilis strain T429 by spray drying to control rice blast disease

Cited by 34 publications

References 27 publications

Reduction of initial occurrence of rice blast (Pyricularia oryzae) inocula on seeds by microbial and hot water seed treatments

Reduction of initial occurrence of rice blast (Pyricularia oryzae) inocula on seeds by microbial and hot water seed treatments

Preparation of dry flowable formulations of Clonostachys rosea by spray drying and application for Sclerotinia sclerotiorum control

Isolation and evaluation of endophytic Streptomyces endusOsiSh‐2 with potential application for biocontrol of rice blast disease

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