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Aqueous extract of Albizia lebbeck L. and Ficus virens were studied for their effect on growth (Radicle and plumule length) and seed germination of Brassica campestris. Plant material (leaves) were collected from F. Virens and A. lebbeck tree in 5, 10 and 15g weight, powdered and was soaked separately in 100 ml of distilled water. Prepared materials were filtered after 24 hours of soaking time. These exudates were applied to B. Campestris seeds to investigate its allelopathic (positive or detrimental) impact on radicle and plumule length and germination percentage, after 24, 48 and 72 hours of incubation period at 26oC. With increase in extract concentration from 5 to 15g, a gradual decrease in growth of B. campestris occurred. Mean values for percent germination showed that both fresh and dry leaves extract have negative impact on B. campestris. Dry leaves extract obtained from A. lebbeck and F. virens have more inhibitory effect on germination percentage (82%) at 72 hours than fresh leaves extract (91%) with same soaking time as compared to control (100%). Plumule is found more affected than radicle for both A. lebbeck and F. virens. Dry leaves extract of F. virens was found more inhibitory for radicle length (0.97cm) than A. lebbeck (1.20ccm) as compared to control(4.38cm) while fresh leaves extract of F. virens were found less inhibitory (1.41cm) for radicle than A. lebbeck (1.02cm), when compared to control (4.38cm). Moreover, fresh extract of A. lebbeck were observed more inhibitory (0.41cm) for plumule length in comparison with F. virens (0.80cm), while for dry extract F. Virens were found more inhibitory(0.79cm) on test species than A. lebbeck (1.27cm). Result of the study revealed that radicle was more affected negatively by A. lebbeck than F. virens while plumule was more inhibited by Ficus than Albizia. However inhibitory effect of both Albizia and Ficus was same on germination percentage of Brassica Campestris, at 72 hours of soaking time. Overall., A. lebbeck was observed more inhibitory than F. Virens on test species. The result suggested that F. virens and A. lebbeck have overall negative effect on Brassica campestris, reducing germination percentage and seedling growth of test species.

A comparative study of the allelopathic effects of Albizia lebbeck L. and Ficus virens on growth and germination of Brassica campestris L.