Errata — Chapter Approved: Codex: Tyranids Q&A (v2.0): A psychic hood can only nullify Hive Mind powers that require a Psychic test to use — that means only Catalyst and an over-charged Warp Blast bolt. It cannot cancel constant, no-test powers like Synapse Creature, The Horror, Psychic Scream, or Warp Field.
Hive Mind Powers
Source: Codex: Tyranids, p. 9; Chapter Approved – Codex: Tyranids Q&A (v2.0), p. 3