the Effect of Fertilizer Placement on Germination, Field and Yield of CES-55 Mungo Cultivar

Date

3-1989

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Rodolfo P. Cabangbang

Co-adviser

R. P. Bader

Abstract

Twenty two promising selections from advanced genetic crosses of leafhopper resistant and high yielding parents of cotton were evaluated to determine the degree of hairiness and its association with leafhopper damage. Furthermore, the relationship of leaf hairiness with some maturity measures, yield and yield components were also evaluated. The materials used in the study exhibited high degree of leaf hair density and hair length variations in both the basal and apical leaves. The results also showed that while more hairs were produced by apical leaves, the length of hairs were longer among the basal leaves. A high association of leaf hairiness, particularly apical leaf hair density, with leafhopper resistance was found. The results highlighted the more important role of apical leaf hair density in leafhopper resistance regardless of hair length. The correlation analyses did not show any association between hair density in the apical leaves and seedcotton yield, number of bolls, boll maturity period, days to first flowering, days to first boll opening, and total flowers produced within 36 days from day of first flowering. This result suggests that plant breeders can fully exploit leaf hairiness to improve cotton cultivars.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1989 A42 S26

Document Type

Thesis

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