Effect of napthaleneacetic acid and gibberellic acid on spike shedding of black pepper (Piper nigrum L.)

Date

6-1970

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Juan T. Carlos Jr.

Co-adviser

Ismael S. Asuncion

Abstract

Spike abscission commenced a week after anthesis in both blooms. Abscission peaks occured in the fourth and from the second to the third week after anthesis for the main and second blooms, respectively.

Only napthaleneacetic acid (NAA) was used in the main bloom. It did not influence abscission when applied at anthesis but increased it when sprayed one to three weeks later.

In the second bloom, 100 ppm of gibberelic acid (GA) arrested spike abscission up to the eight week when applied at anthesis. Spike abscissionwas also delayed by two and four weeks with 200 ppm of GA and 100 ppm of NAA, respectively. In general, 100 ppm of either GA and NAA significantly increased spike yield. Likewise, the number of aborted peppercorns was reduced with GA. Furthermore, GA and NAA improved the size and weight of mature peppercorns.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1970 A42 T65

Document Type

Thesis

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