Pathogenic Fungi and Bacterium Intercepted in Oilseed Crops Introduced During 1999–2008
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A large number of germplasm and trial material of oilseed crops are being introduced each year to develop better crop varieties. There is always an inherent risk of introduction of a new pathogen(s) or race(s) or virulent strain(s) into the country along with such imports. During 1999–2008, a total of 10,450 germplasm samples of different species of oilseed crops viz., brassicas, crambe, linseed, safflower, sesame, soybean and sunflower were imported from several countries. Seed health testing of these samples for quarantine clearance resulted in the detection of pathogenic fungi in 1,300 samples which included - Alternaria brassicae, A. brassicicola, Botrytis cinerea, Phoma lingam in Brassica spp.; A. brassicicola in Crambe spp.; B. cinerea, Fusarium solani, Puccinia carthami in Carthamus spp.; Cercospora kikuchii, Colletotrichum dematium, F. oxysporum, F. solani, Macrophomina phaseolina, Peronospora manshurica in Glycine spp.; A. helianthi, P. helianthi in Helianthus spp.; A. lini in Linum spp.; A. sesami, C. sesami, M. phaseolina, Rhizoctonia bataticola in Sesamum spp. and a bacterium Xanthomonas campestris pv. campestris in Brassica spp. Significance of interception of pathogenic fungi and the bacterium is discussed.
Germplasm, Interceptions, Oilseed crops, Pathogenic fungi, Pathogenic bacterium, Quarantine, Salvaging.