There is widespread use of chemical amendments to meet the demands for increased productivity in agriculture. Potentially toxic compounds, single or in mixtures, are added to the soil medium on a regular basis, while the ecotoxicological risk assessment procedures mainly follow a chemical by chemical approach. Picoxystrobin is a fungicide that has caused concern due to studies showing potential...

The use of herbicides for weed control often catches the eye environmentalists as it harms soil microflora leading to deteriorated health. So, efforts are being made in order that can cause no or very less harm microflora. In this context, an experiment is planned know potential effect different and allelochemicals on density microbial population under direct seeded rice where herbicide managem...

Title of Document: THE MICROBIAL ECOLOGY AND HORTICULTURAL SUSTAINABILITY OF ORGANICALLY AND CONVENTIONALLY MANAGED APPLES. Andrea R. Ottesen, PhD, 2008 Directed By: Professor, Dr. Christopher S. Walsh, Plant Sciences and Landscape Architecture Objectives Organically and conventionally managed apple trees (Malus domestica Borkh) were evaluated for three growing seasons (2005-2007) to examine th...

Understanding the interactions of plant-parasitic nematodes with antagonistic soil microbes could provide opportunities for novel crop protection strategies. Three arable soils were investigated for their suppressiveness against the root knot nematode Meloidogyne hapla. For all three soils, M. hapla developed significantly fewer galls, egg masses, and eggs on tomato plants in unsterilized than ...

Soil is an inexhaustible source of microorganisms significant interest to biotechnology. Bacteria are able control the growth pathogenic microflora, stimulate plant growth, and decompose pollutants varying degrees toxicity. make a contribution cycle substances. The aim this work was isolate aerobic from soil samples two types - forest, without technogenic history, agro-industrial, evaluate thei...

Fungi play important and diverse roles in soil ecosystems. They act as plant pathogens, mycorrhizal symbionts and most importantly, as the principal decomposers of organic materials (Christensen, 1989; Thorn, 1997). Fungi also represent a dominant component of the soil microflora in terms of biomass (Thorn, 1997). Compared with bacterial communities, however, knowledge regarding the diversity a...