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Learn about the comparison among P. Graminis, P. Recondita and P. Striiformis.
Comparison # P. Graminis:
1. Causes black rust of wheat attacking the stems most severely.
2. Generally appears in March in Northern India and the last week of November in South India
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3. Uredosori appear on leaves, stems and ears.
4. Uredopustules are red or brown in colour, elongated and large.
5. Uredospores brown and oval with four equatorial germ pores.
6. Teleutosori confined to stem, black in colour, elongated.
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7. Teleutosori burst on maturity
8. Teleutospores black coloured, bicelled round or conical at the apex.
9. Primary Host: Wheat Alternate Host: Berberis vulgaris
10. Recurrence due to urediniospores blown from Hills.
Comparison # P. Recondite:
1. Causes brown rust attacking the leaf lamina exclusively
2. Appears in January in the Northern and Eastern states of India
3. Uredosori are restricted to leaves.
4. Uredopustules are bright orange in colour scattered, small, oval or round.
5. Uredospores bright orange in colour, oval with 3-4 germ pores.
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6. Teleutosori rarely formed, if formed, develop on lower surface of leaves, brown in colour.
7. Teleutosori do not burst at maturity.
8. Teleutospores brown coloured, bicelled, rounded and thickend at the apex.
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9. Primary Host: Wheat Alternate Host: Muehlenbergia hugeli
10. Same as in P. graminis.
Comparison # P. Striiformis:
1. Causes yellow rust attacking the leaf lamina most severely along- with stem and ears.
2. Generally appears during January-February in Northern and Eastern states.
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3. Uredosori appear on leaf sheaths and ears.
4. Uredopustules always arranged in long stripes, lemon yellow in colour, small, oval
5. Urediospores yellow coloured, nearly round with 6-10 germ pores.
6. Teleutosori confined to the lower surface of the leaf, generally yellow coloured.
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7. Teleutosori do not burst at maturity.
8. Teleutospores yellow coloured, bicelled, curiform, conical at the apex.
9. Primary host: Wheat Alternate Host: Thalictrum fulvum.
10. In addition to urediniospores inoculum comes from collateral Hosts.
