A study of thrips resistance in peanuts begun by the Oklahoma Agricultural Experiment Station in 1966 was extended in 1968 and 1969 to 18 additional field and laboratory experiments. The 350 test entries included 243 Plant Introductions, 9 varieties, and 136 selections, and included 225 entries not previously tested for thrips resistance by this station. Peak populations in 1968 occurred on prebloom plants as was true in 1966 and 1967. Eight of the Plants introduction had damage levels in the field ranging from 81 to 93% of damage sustained by ‘Starr,’ the check variety. A ‘Valencia’ type peanut, PI 280688, was one of the more promising entries and demonstrated antibiosis and nonpreference as its mechanisms of resistance. A few selections from commercial varieties, made by Oklahoma peanut breeders to test agronomic performance, had moderately less damage than their parents.
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Kinzer et al. (1973) studied this question.