Organic Amendments and Soil Suppressiveness in Plant Disease by Mukesh K. Meghvansi, Ajit Varma PDF

By Mukesh K. Meghvansi, Ajit Varma

ISBN-10: 3319230743

ISBN-13: 9783319230740

ISBN-10: 3319230751

ISBN-13: 9783319230757

This publication presents a well timed evaluate of strategies in plant disorder administration concerning microbial soil suppressiveness and natural amendments.

Topics mentioned contain the effect of suppressive soils on plant pathogens and agricultural productiveness, the enhancement of soil suppressiveness throughout the software of compost and the improvement of illness suppressive soils via agronomic administration. extra chapters describe illnesses brought on by phytopathogens, comparable to Pythium, Fusarium and Rhizoctonia, interplay of rhizobia with soil suppressiveness elements, biocontrol of plant parasitic nematodes through fungi and soil suppressive microorganisms.

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Extra resources for Organic Amendments and Soil Suppressiveness in Plant Disease Management

Example text

2011; Hoitink and Fahy 1986). 7 Physico-chemical Properties of Compost and Compost Tea While important, microbiological properties per se do not fully explain the capacity of compost and compost tea to enhance soil suppressiveness. Physico-chemical properties of compost and compost tea may protect plants against various diseases through direct toxicity, improved nutritional status or SAR. For example, Spencer and Benson (1982) and Hoitink and Fahy (1986) found that the ability of compost to suppress diseases caused by pathogens, to which free water is important for asexual multiplication, was dependent on the ability of compost to raise the air capacity of a substrate above 15 %.

Compost and compost tea used as biocontrol agents fall under the latter group of strategies in this paradigm shift. Although research on compost and compost tea has been conducted for decades, there is now increasing interest in their possible role in developing suppressive soils and managing plant diseases. This interest has primarily arisen due to increasing demand for organically produced foods (Dimitri and Greene 2000) and concerns by the public over the use and potential negative impacts of synthetic pesticides on human health and environment.

In fact, Bonilla et al. (2012) hypothesised that in most cases, suppressive soils owe their activity to a combination of general and specific suppression. However, most researchers have concluded that compost and compost tea suppress phytopathogens and diseases through general rather than specific mechanisms. Unfortunately, the disease-suppressive effects resulting from general mechanisms are not easily transferable from one medium to another. e. general or specific, the degree of disease suppression observed with the application of compost or compost tea to soils can vary greatly or be short lived.

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Organic Amendments and Soil Suppressiveness in Plant Disease Management by Mukesh K. Meghvansi, Ajit Varma


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