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An experiment was carried out during 1999 to 2000 to assess the effect of paclobutrazol in controlling vigour; induction of flowers, improving fruit set and yield in ten years old grafted mango trees cv. Dashehari grown at the Institute of Agriculture and Animal Science, Rampur, Nepal. After the harvest of fruits, the twigs were pruned (10-15 cm top shoots) and sprayed with 1% urea on 1 July 1999. After development of new shoots from the pruned twigs, paclobutrazol concentrations @ 0.0, 0.5, 0.75, 1.0 and 1.25 g a.i/tree/meter canopy diameter were applied at collar zone of mango trees on August 27, September 27, and October 27, 1999. Paclobutrazol treatments induced flowering and fruiting in the new shoots produced in July after pruning. Paclobutrazol @ 1.0 g a.i. per tree per meter canopy diameter gave consistently the best results in all the parameters tested in all dates of application. September treatments with 1.0 g a.i./tree/meter canopy diameter was highly effective in increasing flowers, reducing vegetative growth, increasing fruit set, and yield compared with August and October treatments. August treatment was relatively superior to the October treatment. Thus, paclobutrazol treatments significantly induced flowering and fruiting in off-year under Chitwan condition.

 
 
 
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