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Resistance of spring wheat varieties to grasshopper attack
- Hehn, E.R., Grafius, J.E.
- Agronomy journal 1949 v.41 no.10 pp. 467-469
- Triticum aestivum, Melanoplus bivittatus, pest resistance, variety trials
- 1. Data have been presented which support previous observations of differences between spring wheat varieties in their resistance to grasshopper attack. 2. The amount of mechanical tissue in the hypodermal region of the culm in sections taken 1 cm below the peduncle showed a strong negative relationship to the percentage of heads clipped by the two-striped locust, Melanoplus bivitattus (Say). 3. Selection of lines with an abundance of mechanical tissue in the hypodermal region of the culm 1 cm below the peduncle has been suggested as a criterion for isolating lines of spring wheat that are highly unpalatable to grasshoppers.