Author : David Barr Nehl
Publisher :
ISBN 13 : 9780734713247
Total Pages : 128 pages
Book Rating : 4.7/5 (132 download)
Book Synopsis Black Root Rot and Slow Early Season Growth of Cotton by : David Barr Nehl
Download or read book Black Root Rot and Slow Early Season Growth of Cotton written by David Barr Nehl and published by . This book was released on 2001 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Black root rot was first observed in Australian cotton in 1989. The disease has spread rapidly since then and now occurs in most areas in NSW and southern Queensland. Black root rot is caused by a soilborne fungus that survives for long periods in the soil as very resilient, dormant spores. Spores are produced abundantly on cotton roots and each cotton crop deposits more spores in the soil. Consequently, the severity of black root rot increases in proportion to the number of cotton crops, irrespective of fallows or rotations. The reproductive capacity and toughness of the spores make this fiungus vitually impossible to eradicate. The spores are easily carried in moving water or in mud on vehicles and machinery. If black root rot continues to increase at its current rate, then 95% of fields in the established cotton-growing regions of NSW may have the disease by 2004.