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§ 180.1027 Nuclear polyhedrosis virus of Heliothis zea; exemption from the requirement of a tolerance.
(a) For the purposes of this section, the viral insecticide must be produced with an unaltered and unadulterated inoculum of the single-embedded Heliothis zea nuclear polyhedrosis virus (HzSNPV). The identity of the seed virus must be assured by periodic checks.