Morphological characteristics of cotton (Gossypium Hirsutum) associated with leafhopper (Empoasca Bigutilla) resistance

Date

3-1980

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

Rey Bader

Abstract

Forty seven cotton (Gossypium sp) cultivars were evaluated to establish relationships between some morphological characters and resistance to leafhoppers (Empoasca bigutulla), thereby identifying those characters that may serve as determinants in selecting for leafhopper resistant line.

Using a simple linear correlation between leafhopper damage rating and leafhopper count at 50, 60 and 70 and 30 DAE, respectively. It was observed that leafhopper resistance increases with a decreasing midrib thickness. The predominance of single-haired clusters predisposes a higher degree of resistance although at a low significance level. Leafhopper resistance was found to increase with hair length and density in the midrib.

It also stresses that midrib thickness, hair length and density are characters that can be associated with resistance. Such characters can therefore serve as determinants in screening for leafhopper resistance.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 1980 A42 T65

Document Type

Thesis

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