Study dynamics of phylloplane fungi in relation to Ascochyta blight in chickpea
Abstract
Eight chickpea varieties (3 resistant* and 5 susceptible+) were screened for the abundance and diversity of phylloplane fungi. This study was carried out before and after the foliar spray of the pathogen, Aschochyta rabiei on field grown chickpea plants. Samples for study were also collected from the local market in the months of March and April. A total of nine fungal species were encountered in the screening process of six market samples collected at an interval of one week. The number of phylloplane fungi associated with the market samples increased with time. The samples collected in April turned up with maximum diversity of phylloplane fungi. Screening of the experimental plants yielded a total of eight fungal species. Except for two species i.e., Alternaria alternata and Aspergillus niger, the phylloplane flora of the market samples and the experimental plants was totally different. During the early stages (before the spray) the number of fungi associated with the phylloplane was significantly low as compared to the later stages i.e., after the spray. However, the density of these fungi increased during the later stages in three varieties which were NE 1256*, AUG 970+ and ILC 1256+. While for varieties 184 W*, CM 72+, ICC 630+ and ILC 2548* the pattern was not very clear. In the case of C 679+, the density increased with an increase in the age of the host plant.
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