Efficacy of Fungicides and Bioagents against Damping off  in Chilli caused by Pythium aphanidermatum

Tekale, A. G.; Guldekar, D. D.; Kendre, VP; Deshmukh, A.P.; Potdukhe, S. R.

doi:10.20546/ijcmas.2019.806.074

Cited by 8 publications

(6 citation statements)

References 7 publications

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“…In one of the recent studies, Bacillus subtilis subsp. subtilis, and T. harzianum significantly enhanced tomato plant growth and immunity when exposed to P. infestans (Bahramisharif and Rose, 2019), and T. harzianum proved effective in controlling damping off disease of chilli ( Capsicum annuum L. ) caused by Pythium aphanidermatum (Tekale et al, 2019).…”

Section: Biological Control Of Pre-emergence Damping-off Of Tomato Se...mentioning

confidence: 99%

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2022

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Instructions to AuthorsScopes Study areas include cell biology, genomics, microbiology, immunology, molecular biology, biochemistry, embryology, immunogenetics, cell and tissue culture, molecular ecology, genetic engineering and biological engineering, bioremediation and biodegradation, bioinformatics, biotechnology regulations, gene therapy, organismal biology, microbial and environmental biotechnology, marine sciences. The JJBS welcomes the submission of manuscript that meets the general criteria of significance and academic excellence. All articles published in JJBS are peerreviewed. Papers will be published approximately one to two months after acceptance.

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Section: Biological Control Of Pre-emergence Damping-off Of Tomato Se...mentioning

confidence: 99%

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2022

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“…The use of these marine bacteria and yeasts are, therefore, an option for P. ultimum biocontrol in ancho-type pepper plants, thereby minimizing the application of synthetic fungicides.Agronomy 2020, 10, 408 2 of 12 by immediate infection makes management of this phytopathogen very difficult [7]. Several Pythium species, including P. aphanidermatum, P. irregular, and P. ultimum, are known to cause damping-off and root rot diseases in pepper [8][9][10]. Although synthetic fungicides have shown promising results in controlling damping-off disease, phytotoxicity and fungicide residues pose serious problems to human and animal health, as well as the environment.…”

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confidence: 99%

Efficiency of Marine Bacteria and Yeasts on the Biocontrol Activity of Pythium ultimum in Ancho-Type Pepper Seedlings

et al. 2020

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Ancho-type pepper (Capsicum annuum L.) is a crop susceptible to Pythium ultimum, which has already been controlled with synthetic fungicide applications; however, marine antagonist microorganisms could be an alternative source of control. The efficiency in vitro and in vivo of marine bacteria and yeasts was determined against P. ultimum. The inhibition of the radial growth of P. ultimum was quantified in vitro by the bacteria Stenotrophomonas rhizophila KM01 and KM02; Bacillus subtilis RBM01 and RBM02, B. amyloliquefaciens 2RLBF and 3R4CF; and Pseudomonas spp. 2R6BF and 2RE9CF, as well as the yeasts Debaryomyces hansenii 1R11AB, 1R11CB, and LL01 and Cryptococcus laurentii 2R3BF and 2R1CB. The β-1,3-glucanase activity of the marine microorganisms was quantified in the presence of the phytopathogen. The disease index (DI), growth parameters, and colony forming units (CFU) were determined in ancho-type pepper plants inoculated with marine bacteria, yeasts, and P. ultimum. The radial zone of the phytopathogen was inhibited by 80% and 75% by S. rhizophila KM01 and C. laurentii 2R1CB, respectively. D. hansenii LL01 and S. rhizophila KM02 showed the highest activity of β-1,3-glucanase, with 6060 U/mL and 47 U/mL, respectively. B. subtilis RBM02 protected 100% of the plants from the oomycete, and an increase was quantified in all the growth parameters and CFU. The use of these marine bacteria and yeasts are, therefore, an option for P. ultimum biocontrol in ancho-type pepper plants, thereby minimizing the application of synthetic fungicides.Agronomy 2020, 10, 408 2 of 12 by immediate infection makes management of this phytopathogen very difficult [7]. Several Pythium species, including P. aphanidermatum, P. irregular, and P. ultimum, are known to cause damping-off and root rot diseases in pepper [8][9][10]. Although synthetic fungicides have shown promising results in controlling damping-off disease, phytotoxicity and fungicide residues pose serious problems to human and animal health, as well as the environment. In this context, phytosanitary measures and the management of pepper cultivation should include the application of microorganisms as biocontrol agents to minimize the use of synthetic fungicides [11].Bacteria and yeasts have a high capacity to control phytopathogens without causing damage to human and animal health and the environment [12,13]. Several mechanisms have been proposed for the biocontrol of phytopathogens by bacteria and yeasts, including competition for space and nutrients [14,15], lytic enzyme production such as β-1,3-glucanase [16,17], and induction of host resistance [18,19], among others. Both microorganisms have been isolated in different terrestrial ecosystems, mainly in plants, fruits, and soils; the main bacteria used as biocontrol agents are species of Stenotrophomonas, Bacillus, and Pseudomonas, which have already been reported for the control of Fusarium proliferatum in melon [20]; Sclerotium rolfsii [21] and Rhizoctonia solani in wheat [22]; and F. solani in cassava [23], among others. O...

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“…and Phytophthora spp. (Taylor et al, 2002;Tekale et al, 2019). Therefore, alternative solutions are urgently needed to foresee the increasing demand for synthetic chemical-free baby-leaf spinach.…”

Section: Spinach (Baby-leaf ) Production and Challengesmentioning

confidence: 99%

“…and Phytophthora spp. has been found (Taylor et al, 2002;Tekale et al, 2019). The increasing awareness of the environmental impacts of chemical treatments and of food safety has led to more and more restrictions on the use of chemical field and seed treatments to manage damping off (United Nations Environment Programme (UNEP), 2006; European Commission, 2021).…”

Section: Control Of Damping Offmentioning

confidence: 99%

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From seed to seedling - damping-off tolerance in Spinacia oleracea L

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Table of contents Chapter 1. General introduction Chapter 2. Sensitivity of spinach seed germination to moisture is driven by oxygen availability and influenced by seed size and pericarp Chapter 3. Evaluation of damping-off tolerance in spinach cultivars in field soils and in a standardised lab assay with Pythium ultimum Chapter 4. Rate of seedling emergence is not the only driver of pre-emergence damping-off tolerance in spinach Chapter 5. Higher seed maturity levels, darker pericarp, and smaller seed size relate to improved damping-off tolerance in spinach Chapter 6. General discussion Bibliography Summary Samenvatting Acknowledgements Biography Training and education statement General introductionChapter 1General introduction | 17 reflectance from the spinach seed pericarp has been shown to be a good marker for the presence of fungal infection of those seeds (Olesen et al., 2011). In addition, chlorophyll fluorescence (CF) of a seed can be measured by emitting light onto the seed at 450 or 660 nm and measuring excitation from the seed at 730 nm. CF has been demonstrated to be a good marker for the maturity level of seeds of many plant species, with an inverse correlation with germination (Jalink et al., 1998). Also, for sugar beet and spinach seeds, where CF is measured from the pericarp instead of the seed coat, CF correlated negatively with germination (Deleuran et al., 2013;Boelt et al., 2018). In this study, spectral and fluorescence measurements in addition to morphological measurements of spinach seeds are performed and, for the first time, related to damping-off tolerance. Chapter 2Uniform seedling emergence is crucial for economically viable spinach (Spinacia oleracea L.) production. However, non-uniform seed germination occurs due to variation in moisture sensitivity among and within spinach seed lots. To test moisture sensitivity, we developed a floating germination system with fixed distances between the water table and germination papers, so that moisture levels were standardised. We tested germination performance of different cultivar seed lots, with one seed lot fractionated into different seed sizes, and of seeds with an intact, open, or removed pericarp. At high moisture level, smaller seeds germinated better than larger seeds, and seeds without a pericarp or with an open pericarp germinated better than intact seeds. The pericarp of smaller seeds was relatively thinner than the pericarp of larger seeds. A lower temperature or increased oxygen level resulted in improved germination of differently-sized seeds at a high moisture level. In conclusion, the sensitivity of spinach seed germination to moisture is influenced by seed size, hence pericarp thickness and intactness, and is driven by oxygen availability to the seed embryo. To determine the full germination potential of spinach seed lots, we recommend a standardised low moisture level in addition to a temperature of 15 to 20°C.

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Efficacy of Fungicides and Bioagents against Damping off in Chilli caused by Pythium aphanidermatum

Cited by 8 publications

References 7 publications

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Efficiency of Marine Bacteria and Yeasts on the Biocontrol Activity of Pythium ultimum in Ancho-Type Pepper Seedlings

From seed to seedling - damping-off tolerance in Spinacia oleracea L

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