Some effects of foliar spray of zinc sulphate on growth, yield and fruit quality of guava (Psidium guajava L.)

Abstract

Responses on various characters of guava trees due to foliar spray of zinc were studied in the field trial. The guava trees were sprayed with 0.0%, 0.2% and 0.4% zinc sulphate solutions during July 1966 and 1967. Significant improvement in growth characters, i.e., elongation of terminal shoot, number of leaves, leaf area per shoot and chlorophyll recovery was observed with zinc spray. The zinc spray also significantly reduced the time for fruit maturity and increased fruit yield significantly. The significant improvement was also recorded on Fruit weight, length, diameter, reducing sugars, Vitamin C, pectic substances and total soluble solids, And significant reduction in acidity.