Evaluation of Peanut Breeding Lines for Resistance to Silverleaf Whitefly (Homoptera: Aleyrodidae)

  • Heather J. McAuslane
  • David A. Knauft
  • Freddie A. Johnson


Silverleaf whitefly, Bemisia argentifolii Bellows & Perring, n. sp., is a new and occasionally damaging pest of peanut, Arachis hypogaea L., in Florida and other southern states. In 1992 and 1993, elite germplasm from the peanut breeding program at the University of Florida and several commercial cultivars were evaluated for resistance to silverleaf whitefly. In 1992, 52 genotypes that were chosen based on their performance in previous trials were evaluated. Numbers of whitefly red-eyed nymphs on peanut genotypes differed significantly. However, only two genotypes supported fewer whiteflies (although not significantly) than the cultivar ‘Southern Runner’. In 1993, we evaluated selections of crosses between Florida parent material (81206 and 567A) and a North Carolina parent (GP-NC343) with multi-insect resistance. All selections tested had higher numbers of whitefly eggs and red-eyed nymphs than either ‘Florunner’ or ‘Southern Runner’. No resistance to silverleaf whitefly was found in the peanut germplasm tested.
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