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black spot

Catalogue: GRDC Media
Department of Agriculture, Fisheries and Forestry (DAFF) principal pathologist Greg Platz said there was a lack of evidence to suggest that the black spotting was caused by spot form net blotch and fungicide applications would be a costly and ineffective means of control... "It is logical to conclude that the black spotting we are currently seeing on some barley crops in the northern region may be spot form net blotch as the symptoms are very similar to the early stages of the disease," Mr Platz said... "Spot form net blotch has seldom been isolated from samples tested and we believe the cause is physiological leaf spotting (PLS), or oxidative stress, largely as a result of current environmental conditions...
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Catalogue: GRDC Media
Department of Agriculture, Fisheries and Forestry (DAFF) principal pathologist Greg Platz said there was a lack of evidence to suggest that the black spotting was caused by spot form net blotch and fungicide applications would be a costly and ineffective means of control... "It is logical to conclude that the black spotting we are currently seeing on some barley crops in the northern region may be spot form net blotch as the symptoms are very similar to the early stages of the disease," Mr Platz said... "Spot form net blotch has seldom been isolated from samples tested and we believe the cause is physiological leaf spotting (PLS), or oxidative stress, largely as a result of current environmental conditions...
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Catalogue: Ground Cover
Black spot resistance in field peas advanced.. Bonnie Hargreaves was awarded a GRDC undergraduate honours scholarship to investigate black spot in field peas to better understand how to breed for resistance.. Individual plants were found with resistance to black spot and early flowering times suitable for southern Australia: " the correlation between the two traits indicated that later flowering times meant better resistance to black spot," she says...
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Catalogue: GRDC Final Reports
Cycle 2 F2 progeny were assessed for black spot resistance and stem strength in the winter of 2004, together with Cycle 2 parents and the original parents in a black spot nursery to measure the effectiveness of recurrent selection over two cycles... Heritability for both traits was moderate, with broadsense heritability measured at 43% for leaf disease and 39% for stem strength... Of six varieties evaluated in this study, there was significant variation among varieties in stem strength - as measured by force and flexion - and significant variation among varieties in diameter and compressed stem thickness...
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