Showing papers by "Jyoti Kumar Sharma published in 1980"

Effect of Cladosporium aecidiicola Thum. on the viability of urediniospores of Melampsora medusae Thum. in storage

Abstract: The viability of urediniospores of Melampsora medusae decreased markedly when stored in mixture with the conidia of Cladosporium aecidiicola. The rate of decrease was more rapid in samples stored at 16°C with high concentration of Cladosporium (ratio of urediniospores to conidia 10:1 by weight) than at −12°C and low concentration (20:1 by weight).

Forms and degrees of resistance in Populus spp. to the Melampsora leaf rusts occurring in Australasia

Abstract: Summary The Sub-section Albidae, the only major taxomonic grouping of Populus immune to both Melampsora larici-populina Kleb, and M. medusae Thum, leaf rusts in the field in Australasia, is worthy of fuller investigation for use in commercial and aesthetic plantings. Preliminary investigations indicate that race-specific resistance is common in the Aigeiros Section of Populus and this has significant implications in the establishment of clones of this Section. Rust resistance, disease progress pattern and length of growing season of clones are important considerations in the selection of clones for certain purposes in particular environments.