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- Title
Development of Melampsora ciliata rust on nursery-grown poplars in north-western Himalayas.
- Authors
Sharma, R. C.; Khan, Y.; Sharma, S.; Malhotra, R.
- Abstract
Development of leaf rust (Melampsora ciliata) in different species, hybrids and cultivars of poplar (Populus spp.) was studied in nursery-grown plants. Five different criteria were used to assess the disease development. The mean disease index on 10 August was 9.4% which increased to 70.0% on 10 October. The lowest disease index (5.5%) was recorded in P. yunnanensis whereas the maximum was recorded in P. × euramericana ‘Rubra-Poiret’ (59.5%). The apparent infection rate per unit per day was highest in P. nigra × P. trichocarpa (9.7 × 10–2) whereas the minimum occurred in P. maximowiczii × P. berolinensis ‘Oxford’ (3.3 × 10–2). The area under the disease progress curve was a maximum in P. × euramericana ‘Rubra-Poiret’ (26.7) and a minimum in P. yunnanensis (1.6). Complete defoliation by the first half of October occurred in P. nigra × P. trichocarpa, which also had the maximum apparent infection rate and area under the disease progress curve. Inoculum production was highest in P. nigra × P. trichocarpa and lowest in P. maximowiczii × P. berolinensis ‘Oxford’.
- Subjects
POPLAR tree diseases &; pests; RUST diseases; PLANT disease etiology
- Publication
Forest Pathology, 2001, Vol 31, Issue 5, p313
- ISSN
1437-4781
- Publication type
Article
- DOI
10.1046/j.1439-0329.2001.00256.x