The greenbug, Schizaphis graminum (Rondani), is a major pest of wheat in North America, reducing U.S. wheat production by $60 to $100 million each year. In this research, 149 wheat lines containing genes from Aegilops tauschii (Coss.) Schmal. were evaluated for resistance to greenbug biotype I. More than 50% of the lines sustained moderate foliar chlorosis from greenbug feeding, and approximately one third of all the lines were highly resistant. All lines with chlorosis scores similar to the resistant control ‘Largo’ expressed high levels of antibiosis, producing greenbug populations with mean weights ranging from 0.05 to 11.8 mg. There was no significant difference between greenbug weights on these lines and those reared on ‘Largo’, but the mean weight of individuals reared on the susceptible control ‘Thunderbird’ was significantly greater than those reared on ‘Largo’ or any of the test lines. The mean population size of greenbugs produced on plants of each line was significantly correlated with mean greenbug weight. Tolerance was not evident in any of the lines examined, but was unexpectedly apparent in ‘Thunderbird’ at a level similar to that in the tolerant control cultivar ‘Largo’.
How to translate text using browser tools
1 October 2003
Resistance to Greenbug (Heteroptera: Aphididae) Biotype I in A egilops tauschii Synthetic Wheats
C. Michael Smith,
Sharon Starkey
ACCESS THE FULL ARTICLE
It is not available for individual sale.
This article is only available to subscribers.
It is not available for individual sale.
It is not available for individual sale.
Journal of Economic Entomology
Vol. 96 • No. 5
October 2003
Vol. 96 • No. 5
October 2003
Aegilops tauschii
antibiosis
Schizaphis graminum
tolerance
wheat