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Project Leaders: J. Keith Waldron1,
Elson J. Shields2, Julie L. Hansen3, Donald R.
Viands3
Cooperator: Jerry Cherney 4
Cornell, Ithaca: 1NYS IPM Program,
2Entomology, 3Plant Breeding, 4Crop
and Soil Science Type of Grant: Pest-resistant crops
Project Location: Nationally
Abstract: The combination of a resistant
cultivar and a grass resulted in significantly better PLH control than
did the resistant cultivar alone or the grass alone. The resistant cultivar
had 36% fewer PLH than the susceptible cultivar; however, the number
of PLH was significantly higher than for the plots that were sprayed
with insecticide (average less than 1 PLH per sub-plot). The untreated
plot with the lowest PLH damage score was the resistant alfalfa/grass
mixture (score = 1.8), whereas the resistant cultivar alone scored 2.4
and the susceptible cultivar alone and with grass averaged 3.5.
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