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Response of Greenbug‐Resistant Grain Sorghum Lines and Hybrids to a Natural Infestation of Greenbugs 1
Author(s) -
Johnson J. W.,
Rosenow D. T.,
Teetes G. L.
Publication year - 1974
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1974.0011183x001400030032x
Subject(s) - sorghum , biology , hybrid , infestation , sorghum bicolor , agronomy , grain yield , pest analysis , horticulture
Three greenbug [ Schizaphis graminum (Rondani)]‐ resistant sorghum [ Sorghum bicolor (L.) Moench] lines, 'IS 809,' 'SA 7536‐1,' and 'KS 30,' their F 1 hybrids with greenbug‐susceptible A lines, three susceptible hybrids, and one susceptible line were planted in yield tests subjected to a natural infestation of greenbugs at Lubbock, Texas in 1971 and 1972. In untreated plots, the mean number of greenbugs per plant was higher and leaf injury from greenbug feeding was greater in susceptible entries than in resistant lines and their hybrids. In greenbug‐infested plots, grain yield was significantly reduced only in the early‐blooming susceptible line. Hybrids with one resistant parent exhibited enough resistance to control greenbug populations and significantly reduce leaf death from greenbugs feeding on adult plants.