01562naa a2200217 a 450000100080000000500110000800800410001902200140006010000170007424501480009126000090023952008820024865000170113065300350114765300250118265300260120765300270123370000200126070000170128077300470129716340282023-05-31       1995    bl uuuu     u00u1 u    #d  a0191-26171 aNILES, R. K.  aUse of trifoliate orange as a comparative standard for assessing the resistance of citrus rootstocks to citrus nematode.h[electronic resource]  c1995  aTwenty-one citrus rootstocks were screened in a greenhouse for resistance to Tylenchulus semipenetrans. Parasitism by T. semipenetrans was confirmed by verifying the host suitabilities of rootstocks expected under California conditions to be resistant (C-35 citrange, Swingle citrumelo, and Poncirus trifoliata cv. Rubidoux) or susceptible (Citrus sinensis cv. Argentina and Carrizo citrange) to T. semipenetrans. P. trifoliata cv. Rubidoux was the resistant standard for comparing the host suitabilities of individual rootstocks. Five previously unscreened root-stocks expressed greate resistance than P. trifoliata: 1452 citrumelo, Siamese pummelo x P. trifoliata, and three selections from crosses of C. sunki and P. trifoliata (C-54, C-57, and C-146). Rank correlation showed the relative host suitabilities of individual rootstocks were consistent between two experiments.  aplant growth  aHost suitability of rootstocks  aRootstock selections  aScreening experiments  aSecond-stage juveniles1 aFRECKMAN, D. W.1 aROOSE, M. L.  tPlant Diseasegv.79, n.8, p.813-818, 1995.