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G1 Blackspot Manager model predicts the maturity and release of ascospores in relation to ascochyta blight on field pea

G1 Blackspot Manager model predicts the maturity and release of ascospores in relation to... A simple model, G1 Blackspot Manager, has been developed to predict the seasonal pattern of release of ascospores in relation to ascochyta blight in field pea. The model considers a combination of two weather factors, daily mean temperature and daily total rainfall, to drive progress of maturity of pseudothecia on infested field pea stubble from past crops. Each day is categorised as suitable or not suitable for continuation of the maturation process. The onset of pseudothecial maturity has been found to take place when approximately ten suitable days have occurred. Following the onset of maturity, ascospore release is triggered when daily rainfall exceeds a threshold. The model was satisfactorily calibrated using three datasets from Western Australia. The calibrated model performed well when independently tested with 21 datasets, 17 from Western Australia and 4 from South Australia. It is concluded that G1 Blackspot Manager model has the potential to be used to formulate sowing guides for field pea in southern Australia that minimise the risk of ascochyta blight. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

G1 Blackspot Manager model predicts the maturity and release of ascospores in relation to ascochyta blight on field pea

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References (25)

Publisher
Springer Journals
Copyright
Copyright © 2011 by Australasian Plant Pathology Society Inc.
Subject
Life Sciences; Entomology; Plant Pathology; Ecology; Agriculture; Plant Sciences
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1007/s13313-011-0035-0
Publisher site
See Article on Publisher Site

Abstract

A simple model, G1 Blackspot Manager, has been developed to predict the seasonal pattern of release of ascospores in relation to ascochyta blight in field pea. The model considers a combination of two weather factors, daily mean temperature and daily total rainfall, to drive progress of maturity of pseudothecia on infested field pea stubble from past crops. Each day is categorised as suitable or not suitable for continuation of the maturation process. The onset of pseudothecial maturity has been found to take place when approximately ten suitable days have occurred. Following the onset of maturity, ascospore release is triggered when daily rainfall exceeds a threshold. The model was satisfactorily calibrated using three datasets from Western Australia. The calibrated model performed well when independently tested with 21 datasets, 17 from Western Australia and 4 from South Australia. It is concluded that G1 Blackspot Manager model has the potential to be used to formulate sowing guides for field pea in southern Australia that minimise the risk of ascochyta blight.

Journal

Australasian Plant PathologySpringer Journals

Published: Mar 23, 2011

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