Effects of Silicon Amendment on Soilborne and Fruit Diseases of Avocado

Dann, E. K.; Le, Duy Phu

doi:10.3390/plants6040051

Cited by 24 publications

(18 citation statements)

References 21 publications

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“…In experiment 2 mineral mulch (T7) showed the lowest damage. Mineral mulch 1 (T7) contains silicon, which is known to improve root growth and increase defence mechanisms of roots when infected with Phytophthora (Bekker et al 2006; Bekker et al 2007; Bekker 2011; Dann and Le 2017).…”

Section: Discussionmentioning

confidence: 99%

Soil amendments and suppression of Phytophthora root rot in avocado (Persea indica)

Farooq

McComb

Hardy

et al. 2022

Preprint

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The ability of microbial or mineral-based soil additives to suppress root rot caused by Phytophthora cinnamomi was assessed. Phosphite and metalaxyl treatments for the control of disease, and glyphosate for weed control were also assessed. A treatment simulating avocado orchard conditions had chicken manure, wood mulch, and mulch from beneath trees in an avocado orchard added to the pots. Soil treatments (three probiotic and two mineral-based) were applied to 9-month-old saplings growing in containers in a glasshouse. After one-month, half of the plants of each treatment were inoculated with the pathogen. Three months after inoculation, plants were harvested and plant growth and root damage were measured. In the first experiment infestation with P. cinnamomi significantly reduced fine root dry weight in all plants except those in soil treated with one silicon-based mineral mulch. Visible root damage was higher in plants treated with probiotics. In this experiment, and in a repeat experiment the reduction of fine root damage achieved by spraying plants with phosphite or addition of a silica based mineral mulch was similar. Phosphite was preferable to metalaxyl as a chemical treatment, as the latter reduced shoot and root growth of non-infected plants. Glyphosate treatment of wheat seedlings growing in the pots with the avocados reduced shoot and fine root growth of both non-infected and infected plants. These observations need to be confirmed under field conditions.

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Section: Discussionmentioning

confidence: 99%

Soil amendments and suppression of Phytophthora root rot in avocado (Persea indica)

Farooq

McComb

Hardy

et al. 2022

Preprint

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“…The Si concentration in the tested formulations varied a lot in the different experimental conditions. Under open field conditions, drenching applications generally were performed at higher Si concentrations (178-280 mM Si) [66,67] as compared to foliar sprays (0.05-98.2 mM Si) [35,68]. Under greenhouse conditions, with potted plants, Si was applied to the leaves or by fertigation at low concentrations, ranging from 0.08 to 0.5 mM Si [40,69].…”

Section: Silicon Application Methods To Increase Yield and Qualitymentioning

confidence: 99%

Rate and Timing of Application of Biostimulant Substances to Enhance Fruit Tree Tolerance toward Environmental Stresses and Fruit Quality

et al. 2022

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Biostimulants represent an important category of agricultural inputs characterized by multiple functions. They are used to assist crop growth, yield and to enhance the final quality of produces. Their classification is generally based on claims (i.e., which services they provide to the crop), even though their biological effects are often species-dependent and highly influenced by external factors (i.e., the growing conditions). This review provides a survey of the available scientific literature on the use of biostimulant substances in fruit production, with the specific aim to clarify their predominant mode and time of application. An extremely varied scenario emerged where foliar treatments are common for seaweed extracts, humic and fulvic acids, and where protein hydrolysates and silicon are applied both to the soil (drench) or sprayed to the canopy. Dosages were difficult to compare between the considered studies given the wide range of tested products and the uncertainty in their actual composition. Regarding the number of applications, biostimulants are generally applied following a calendar-approach, covering most of the growing season. When their use is intended to enhance crop tolerance toward environmental stresses, biostimulants are mainly applied before the stressful event to prime plant physiological defenses. Further studies based on multiple-year research projects and standard methodological protocols are urgently needed to verify a clear compliance with biostimulant claims and to evaluate their cost-effectiveness for the fruit production sector.

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“…However, concerning the Si efficiency on the plant's life cycle, Epstein and Bloom (2005) recommended that the proper need of Si element is significant for normal plant growth. Recently, numerous researches have demonstrated that Si mitigates the destructive effects of biotic stresses (pests and diseases) (Dann and Le, 2017;Yang et al, 2017) and abiotic stresses (drought, heavy metal toxicity and salinity) in plants (Biju et al, 2017;Hasanuzzaman et al, 2018;Tayyab et al, 2018b). These benefits are attributed to Si application; thus, Si can play a serious role in order to mitigate drought stress in plants.…”

Section: Introductionmentioning

confidence: 99%

Silicon-Mediated Improvement in Tolerance of Economically Important Crops Under Drought Stress

Pang¹

2019

Appl. Ecol. Env. Res.

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Drought is considered as one of the significant threats to food security worldwide as it inhibits the growth, yield and quality of economically important crops. An increase in crop yield is considered a tremendous achievement as it will be helpful to meet the current growing demand for food in droughtstressed areas. Silicon (Si) is the second most abundant component in the soil. Recent research has revealed that Si can enhance plant tolerance against drought stress. In addition, application of Si can increase seed germination, underground and aboveground biomass, photosynthetic pigments, quality and yield of grains. Therefore, we have summarized the importance of Si in improving the drought tolerance in plants. Furthermore, we have explained the Si-mediated mechanisms which led to modifications in gas exchange properties, homeostasis of the nutrient element, synthesis of compatible solute, osmotic adjustments, antioxidant stimulation and enzymatic action in plants under drought stress. We believe that the current study will help in understanding the importance of Si application in plants under drought stress conditions.

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Effects of Silicon Amendment on Soilborne and Fruit Diseases of Avocado

Cited by 24 publications

References 21 publications

Soil amendments and suppression of Phytophthora root rot in avocado (Persea indica)

Soil amendments and suppression of Phytophthora root rot in avocado (Persea indica)

Rate and Timing of Application of Biostimulant Substances to Enhance Fruit Tree Tolerance toward Environmental Stresses and Fruit Quality

Silicon-Mediated Improvement in Tolerance of Economically Important Crops Under Drought Stress

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