Vol. 69 No: 5

Title:
Effects of Applications of Plant Growth Regulators to Papaya on the Output and Proteolytic Activity of Latex Tapped from Immature Fruits

Authors:
S. LIAQUAT ALI and B.C. MAZUMDAR

pp: 805-808

Abstract:
Pistillate seedling plants of the local cultivar of papaya ‘Deshi’, transplanted 40 d after sowing, were sprayed with aqueous solutions of IBA (25 and 50 ppm), GA₃ (100 and 200 ppm), kinetin (50 and 100 ppm), BA (25 and 50 ppm), ethephon (100 and 200 ppm) or with water (control) 100 d after transplanting, when the experimental fruits borne by them were 15 d old. Latex was collected from the fruits when they were 90–95 d old and continued on four occasions, at 7 d intervals. Highly significant increases in yield and in protease activity of the latex over the control was obtained by application of ethephon. IBA and GA₃ also increased latex production, but spraying the plants with kinetin or BA solutions gave no clear results.

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