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Ascochyta blight of field pea, caused by Didymella pinodes,Phoma medicaginis var. pinodella,Phoma koolunga and Didymella pisi, is controlled through manipulating sowing dates to avoid ascospores of D. pinodes, and by field selection and foliar fungicides. This study investigated the relationship between number of ascospores of D. pinodes at sowing and disease intensity at crop maturity. Field pea...
Field pea (Pisum sativum L.) is widely grown across southern Australia. Delayed sowing is recommended to minimise yield losses caused by the disease ascochyta blight. However, drier and hotter springs in recent seasons have resulted in greater yield penalties from delayed sowing than from this disease. Field pea breeding in these shorter growing seasons has rapidly shifted the selection intensity...
Specific resistance loci in plants are generally very efficient in controlling development of pathogen populations. However, because of the strong selection pressure exerted, these resistances are often not durable. The probability of a resistance breakdown in a pathosystem depends on the evolutionary potential of the pathogen which is affected by: (i) the type of resistance (monogenic and/or polygenic),...
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