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Root rot of safflower in Queensland

Root rot of safflower in Queensland reserve, were paired on oatmeal agar with A 1 and A2 mating strains from the U.S.A. (G. Zentmyer) and Australia J.A.G. Irwin (B.H. Pratt). After 5-10 days incubation at 23°C, oospores Queensland Department of Primary Industries, were produced in 109 of the isolates paired with the A 1 Indooroopilly. Qld. 4068. and were designated A2. No isolate produced an oospore Root and stem rot of safflower (Carthamus tinctorius) when paired with the A2. Two isolates failed to produce in Queensland, caused by undeterm ined Phytophthora spp., oospores with either mating strain. was first reported in 1964 (2). Collections of safflower Recent work (1, 2) indicated that 1-3 per cent of plants with root and stem rot were made by the author P. cinnamomi isolates from other parts of Australia were of during 1972 and 1973 in the Biloela and Emerald districts. the A 1 mating type. However the A 1 is apparently absent The symptoms on diseased plants were identical with those from this locality. described by Erwin (1) for Phytophthora root rot of Measurements of the growth rates of all isolates on safflower caused by Phytophthora drechsleri Tucker in the cornmeal agar at 25°C showed that approximately 9S http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australasian Plant Pathology Springer Journals

Root rot of safflower in Queensland

Australasian Plant Pathology , Volume 2 (4) – Jan 22, 2011

Root rot of safflower in Queensland

Abstract

reserve, were paired on oatmeal agar with A 1 and A2 mating strains from the U.S.A. (G. Zentmyer) and Australia J.A.G. Irwin (B.H. Pratt). After 5-10 days incubation at 23°C, oospores Queensland Department of Primary Industries, were produced in 109 of the isolates paired with the A 1 Indooroopilly. Qld. 4068. and were designated A2. No isolate produced an oospore Root and stem rot of safflower (Carthamus tinctorius) when paired with the A2. Two isolates failed to produce in Queensland,...
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References (9)

Publisher
Springer Journals
Copyright
Copyright
Subject
Life Sciences; Plant Pathology; Plant Sciences; Agriculture; Entomology; Ecology
ISSN
0815-3191
eISSN
1448-6032
DOI
10.1071/APP9730029
Publisher site
See Article on Publisher Site

Abstract

reserve, were paired on oatmeal agar with A 1 and A2 mating strains from the U.S.A. (G. Zentmyer) and Australia J.A.G. Irwin (B.H. Pratt). After 5-10 days incubation at 23°C, oospores Queensland Department of Primary Industries, were produced in 109 of the isolates paired with the A 1 Indooroopilly. Qld. 4068. and were designated A2. No isolate produced an oospore Root and stem rot of safflower (Carthamus tinctorius) when paired with the A2. Two isolates failed to produce in Queensland, caused by undeterm ined Phytophthora spp., oospores with either mating strain. was first reported in 1964 (2). Collections of safflower Recent work (1, 2) indicated that 1-3 per cent of plants with root and stem rot were made by the author P. cinnamomi isolates from other parts of Australia were of during 1972 and 1973 in the Biloela and Emerald districts. the A 1 mating type. However the A 1 is apparently absent The symptoms on diseased plants were identical with those from this locality. described by Erwin (1) for Phytophthora root rot of Measurements of the growth rates of all isolates on safflower caused by Phytophthora drechsleri Tucker in the cornmeal agar at 25°C showed that approximately 9S

Journal

Australasian Plant PathologySpringer Journals

Published: Jan 22, 2011

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