Septoria and Stagonospora Diseases of Cereals - CIMMYT ...
Septoria and Stagonospora Diseases of Cereals - CIMMYT ...
Septoria and Stagonospora Diseases of Cereals - CIMMYT ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
70<br />
Session 3B — E. Arseniuk <strong>and</strong> P.C. Czembor<br />
3. The reported data indicate that<br />
the interaction between S.<br />
nodorum isolates <strong>of</strong> the wheat<br />
biotype <strong>and</strong> wheat <strong>and</strong> triticale<br />
genotypes to a great extent is<br />
more a matter <strong>of</strong> statistics than a<br />
well defined physiological<br />
specialization. Whether the<br />
interaction is detected or not<br />
depends upon the amount <strong>of</strong><br />
disease inflicted by the pathogen<br />
isolates on selected host<br />
genotypes, the effect <strong>of</strong><br />
environmental conditions on<br />
disease development, <strong>and</strong> the<br />
tools <strong>and</strong> precision with which<br />
the host has been examined.<br />
Acknowledgments<br />
This study was financially<br />
supported by the ICD-RSE-FAS-<br />
USDA (Project no. PL-AES-241,<br />
Grant no. MR-USDA-93-139) <strong>and</strong><br />
by the Plant Breeding <strong>and</strong><br />
Acclimatization Institute. The<br />
technical assistance <strong>of</strong> T. Bajor, E.<br />
Matyska, <strong>and</strong> E. Pawióska is<br />
gratefully acknowledged.<br />
Isolate variances<br />
2.4<br />
2.0<br />
1.6<br />
1.2<br />
0.8<br />
Isolate variance = 0.048 + 0.503 (mean cultivar reaction)<br />
r = 0.928, p = 0.01<br />
References<br />
Arseniuk, E., A L. Scharen, P.M. Fried,<br />
<strong>and</strong> H.J. Czembor. 1994.<br />
Pathogenic interactions in X<br />
Triticosecale - <strong>Septoria</strong> spp. <strong>and</strong><br />
Triticum aestivum - <strong>Septoria</strong> spp.<br />
systems. Hod. Rol. Aklim., Nasien.<br />
(Special Edition) 38(3/4):101-108.<br />
Eyal, Z., A.L. Scharen, J.M. Prescott,<br />
<strong>and</strong> M. van Ginkel. 1987. The<br />
<strong>Septoria</strong> <strong>Diseases</strong> <strong>of</strong> Wheat:<br />
Concepts <strong>and</strong> Methods <strong>of</strong> Disease<br />
Management. Mexico D.F.:<br />
<strong>CIMMYT</strong>.<br />
Eyal, Z. 1992. The response <strong>of</strong> fieldinoculated<br />
wheat cultivars to<br />
mixtures <strong>of</strong> <strong>Septoria</strong> tritici isolates.<br />
Euphytica 61:25-35.<br />
Krupinsky, J.M. 1986. Virulence on<br />
wheat <strong>of</strong> Leptosphaeria nodorum<br />
isolates from Bromus inermis. Can.<br />
J. Plant Path. 8:201-207.<br />
Krupinsky, J.M. 1994. Aggressiveness<br />
<strong>of</strong> <strong>Stagonospora</strong> nodorum from<br />
alternative hosts after passage<br />
through wheat. Hod Rol. Aklim.,<br />
Nasien. (Special Edition) 38(3/<br />
4):123-126.<br />
Krupinsky, J.M. 1997a.<br />
Aggressiveness <strong>of</strong> <strong>Stagonospora</strong><br />
nodorum isolates obtained from<br />
wheat in the Northern Great<br />
Plains. Plant Dis. 81:1027-1031.<br />
Henika (t)<br />
Eta (w)<br />
Sigma (w)<br />
0.4<br />
Migo (t)<br />
Jago (t) Maja (t)<br />
Gabo (t) Grego (t)<br />
0.0<br />
-0.2 0.4 1.0 1.6 2.2 2.8 3.4<br />
Mean cultivar reaction on heads (0-9 scale)<br />
Figure 8. Relationship between mean reactions <strong>of</strong> 5 spring triticale (t) <strong>and</strong> 3 spring wheat (w)<br />
cultivars <strong>and</strong> variances <strong>of</strong> SNB induction on heads <strong>of</strong> the cultivars by 15 <strong>Stagonospora</strong> nodorum<br />
isolates <strong>and</strong> their mixture (3 years’ data).<br />
Krupinsky, J.M. 1997b. Stability <strong>of</strong><br />
<strong>Stagonospora</strong> nodorum isolates from<br />
perennial grass hosts after passage<br />
through wheat. Plant Dis. 81:1037-<br />
1041.<br />
Krupinsky, J.M. 1997c. Aggressiveness<br />
<strong>of</strong> <strong>Stagonospora</strong> nodorum isolates<br />
from perennial grasses on wheat.<br />
Plant Dis. 81:1032-1036.<br />
Scharen, L.A., <strong>and</strong> Z. Eyal. 1983.<br />
Analysis <strong>of</strong> symptoms on spring<br />
<strong>and</strong> winter wheat cultivars<br />
inoculated with different isolates<br />
<strong>of</strong> <strong>Septoria</strong> nodorum.<br />
Phytopathology 73:143-147.<br />
Scharen, L.A., Z. Eyal, M.D. Huffman,<br />
<strong>and</strong> J.M. Prescott. 1985. The<br />
distribution <strong>and</strong> frequency <strong>of</strong><br />
virulence genes in geographically<br />
separated populations <strong>of</strong><br />
Leptosphaeria nodorum.<br />
Phytopathology 75:1463-1468.<br />
Skajennik<strong>of</strong>f, M., <strong>and</strong> F. Rapilly. 1983.<br />
Aggressivness <strong>of</strong> <strong>Septoria</strong> nodorum<br />
on wheat <strong>and</strong> triticale. Effects <strong>of</strong><br />
the host <strong>and</strong> infected organs.<br />
Agronomie 3:131-140.<br />
Yechilevich-Auster, M., E. Levi, <strong>and</strong><br />
Z. Eyal. 1983. Assessment <strong>of</strong><br />
interactions between cultivated<br />
<strong>and</strong> wild wheats <strong>and</strong> <strong>Septoria</strong><br />
tritici. Phytopathology 73:1077-<br />
1083.<br />
Zelikovitch, N., <strong>and</strong> Z. Eyal. 1991.<br />
Reduction in pycnidial coverage<br />
after inoculation <strong>of</strong> wheat with<br />
mixtures <strong>of</strong> isolates <strong>of</strong> <strong>Septoria</strong><br />
tritici. Plant Dis. 75:907-910.