Recommendations for field pea in southern Australia. The findings from this study have been incorporated into management pinodes was identified above which disease did not increase. The model was validated with an independent dataset. Severity in relation to ascospore numbers, distance from infested field pea stubble, and Ascospores released from stubble infested with ascochytaīlight were counted periodically in a wind tunnel. pinodes at sowing andĭisease at the end of the season. This studyįurther investigated the relationship between ascospore numbers of D.

pinodes is considered the principal pathogen of concern in this complex. Pathogens, was significantly reduced when co-inoculated with P. pinodella, or the mean lesion diameter of these Onto leaves on field pea plants, or onto excised leaf discs, either the quantity ofĭNA of D. This effect was shown to be fungistatic rather than fungicidal. pinodes on PDA amended with filtrate from P. Colony diameter of the former was reduced on potatoĭextrose agar (PDA) amended with filtrate from broth cultures of P. pinodella had a minor role in the disease pinodes were equally responsible forĭisease symptoms, while P. koolunga to be an important component of the disease complex in South Australia. Naturally infected field pea plants showed P. Soil-borne inoculum graduallyĭecreased in the 3 years following a field pea crop. The quantity of DNA of these pathogens detected in soils was positivelyĬorrelated with ascochyta blight lesions in a pot bioassay. koolunga was detected across field pea cropping soils in South Australia but rarelyįrom other Australian states while D. koolunga were indistinguishable from those caused by D. Symptoms on field pea seedlingsĬaused by P. Of the accepted causal pathogens of ascochyta blight of field pea viz. Sequences of the internal transcribed spacer region were distinct from those The ascochyta blight disease complex in southern Australia. The pathogen, Phoma koolunga, was recognised for the first time as a component of

Yielding particularly when sown early and subjected to strategic fungicide applications. Earlier flowering genotypes were the highest Medium and medium - high rainfall regions. Of the first autumn rains in low rainfall regions and 3 weeks after the first autumn rains in The optimum sowing period was within a week Yield response to fungicide application varied withĭisease severity, sowing date and genotype. Earlier sowing generally resulted in higher yieldĮxcept when ascochyta blight was severe. To identify optimal management strategies.

Research involving sowing dates, genotypes and fungicide treatments was conducted Strategies to reduce loss from this disease. This study provides new information on the causal pathogens and management Regularly causes AUD$25 million loss per annum in Australian field pea (Pisum sativum)Ĭrops. Epidemiology and management of ascochyta blight of field pea (Pisum sativum) in South Australia.Īscochyta blight disease (synonym: blackspot) of field pea has worldwide distribution and

Blight synonym