Decline of Rhizoctonia root rot on wheat in soils infested with Rhizoctonia solani AG-8

Soils collected from two sites were used for up to six successive plantings of wheat in the greenhouse. Soils were infested before each of the first four plantings with Rhizoctonia solani AG-8 or R. oryzae, or left non-infested. R. solani stunted seedlings during the first planting. After a second o...

Full description

Saved in:
Bibliographic Details
Published in:Phytopathology 1993-03, Vol.83 (3), p.260-265
Main Authors: Lucas, P, Smiley, R.W, Collins, H.P
Format: Article
Language:English
Subjects:
ABONOS NITROGENADOS
AGENT PATHOGENE
Agronomy. Soil science and plant productions
Biological and medical sciences
CHAMPIGNON
ENGRAIS AZOTE
Fundamental and applied biological sciences. Psychology
Fungal plant pathogens
HONGOS
LABRANZA
OREGON
ORGANISMOS PATOGENOS
Pathology, epidemiology, host-fungus relationships. Damages, economic importance
Phytopathology. Animal pests. Plant and forest protection
PODER PATOGENO
POUVOIR PATHOGENE
RHIZOCTONIA
Rhizoctonia solani
TRAVAIL DU SOL
TRITICUM AESTIVUM
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Soils collected from two sites were used for up to six successive plantings of wheat in the greenhouse. Soils were infested before each of the first four plantings with Rhizoctonia solani AG-8 or R. oryzae, or left non-infested. R. solani stunted seedlings during the first planting. After a second or third crop, depending upon the soil origin, shoot weights were significantly higher in infested soils than in controls. Shoot growth was never suppressed when soils were infested with R. oryzae. Disease suppressiveness tests performed during a fifth crop demonstrated that successive plantings of wheat into soils infested with R. solani AG-8 caused a decline of the disease. Both a susceptible host (wheat) and virulent pathogen (R. solani AG-8) were necessary to achieve disease suppressiveness. In contrast, R. oryzae did not induce soil suppressive to R. solani. Induction of Rhizoctonia root rot decline occurred earlier in tilled than nontilled soil, and rates of applied nitrogen had little effect on decline
ISSN:0031-949X
1943-7684
DOI:10.1094/Phyto-83-260