Study of dynamics of phylloplane fungi in relation to Ascochyta blight inchickpea
2003
Nasim, G.,Punjab Univ., Lahore (Pakistan). Dept. of Mycology and PlantPathology
Eight chickpea varieties (3 resistant* and 5 susceptible+) were screened for theabundance and diversity of phylloplane fungi. This study was carried out beforeand after the foliar spray of the pathogen, Ascochyta rabiei on field grown chickpeaplants. Samples for study were also collected from the local market in the months ofMarch and April. A total of nine fungal species were encountered in the screeningprocess of six market samples collected at an interval of one' week. The number ofphylloplane fungi associated with the market samples increased with time. Thesamples collected in April turned up with maximum diversity of phylloplane fungi.Screening of the experimental plants yielded a total of eight fungal species. Exceptfor two species i.e., Alternaria alternata and Aspergillus niger, the phylloplane floraof the market samples and the experimental plants was totally different. During theearly stages (before the spray) the number of fungi associated with the phylloplanewas 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 varietieswhich 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+, thedensity increased with an increase in the age of the host plant.
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