G. Bhattarai and G.K. Shrestha
IAAS, Rampur

Abstract

The effect of crop regulating treatments on guava cv. Allahabad Safeda was studied at guava orchard of the Institute of Agriculture and Animal Science, Rampur, Chitwan, from May 2008 to Nov. 2008. The experiment was laid out in a RCBD with four treatments. The treatments were urea (15 %), NAA (800 ppm), Hand Defoliation (100% foliage removal) and control, replicating 5 times. In the rainy season crop the highest number of 317.40 fruits per plant was observed in control, but
it was highest i.e., 206.60 fruits per plant in the hand-defoliated plants in winter. Similarly for rainy Season, net yield (31.13 kg/plant) as well as the estimated yield (34.57 kg/tree) including the loss due to bird injury was the highest in control, but in winter, total yield was highest (27.87 kg/plant) in hand-defoliated plants. From the present study, HD was found most promising treatment for obtaining highest yield in Allahabad Safeda variety of guava under Chitwan condition. However this study need further testing for recommendation over a wide locations and environment.

Keywords: Psidium guajava, urea, NAA, hand defoliation, yield