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
Recommended Citation
Toledo, Rodolfo S., "Morphological characteristics of cotton (Gossypium Hirsutum) associated with leafhopper (Empoasca Bigutilla) resistance" (1980). Undergraduate Theses. 8712.
https://www.ukdr.uplb.edu.ph/etd-undergrad/8712
Document Type
Thesis