Effect of pruning time on bio-chemical parameters of guava (<em>Psidium guajava</em> l.) genotypes

Abstract

The research was carried out at the Instructional-cum-Research Farm, Department of Horticulture, MPKV, Rahuri during the year 2016 and 2017. The present investigations were conducted on seven different genotypes namely RHR-Guv-58, RHR-Guv-60, RHR-Guv-14, RHR-Guv-16, RHR-Guv-3, RHR-Guv-6 and Sardar with five pruning time i.e. 15th May, 15th June, 15th July, 15th August, 15th Sept. and no pruning (control). The experiment was laid out in Factorial Randomized Block Design with forty two treatments and was replicated two times. The results revealed that the maximum TSS of fruit (12.33 0Brix) was observed in Sardar. The maximum total sugars (8.08 %), reducing sugars (5.07 %), sugar: acid ratio (22.33) with minimum acidity (0.36 %) were recorded in G3 (RHR-Guv-58) genotype. The maximum ascorbic acid of fruit (208.33 mg/100 g) and shelf life of fruit (9.75 days) was recorded in G4 (RHR-Guv-14) genotype. Fruit quality of genotypes was remained more or less similar irrespective to pruning time.