This study employed a Cobb-Douglas stochastic production frontier function to estimate the level of technical efficiency. The results of the analysis showed that cropping season of mango growers have been round year. The result of study contributed to tropical fruits efficiency of three seasons instead of only focusing on efficiency of one season or total a year. The findings revealed that season 3 ranked first in terms of technical efficiency (58.2%), followed by season 1 (53.6%) and then season 2 (49.2%). Moreover, the input variables that explained technical efficiency were  fertilizer (root), fertilizer (leaf) and labor in season 1; pesticide, fertilizer (leaf) and labor in season 2; and pesticide, fertilizer (root), fertilizer (leaf) and labor in in season 3. In addition, major determinants of socioeconomic characteristics influenced positively on technical efficiency were plant density and land area in season 1 and season 3; market access, plant density and land area in season 2. By contrast, the constraints to mango production were wrapping bag and classifying sale in season 2, and age and wrapping bag in season 3.

Keywords— Technical efficiency, Cobb-Douglas, mango, Mekong Delta