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Evaluates the use of commercial zinc phosphide baits to reduce rat populations in Hawaiian sugarcane fields. Mortality of black rats and Polynesian rats in laboratory bioassays; Enhancement of the effectiveness of zinc phosphide oat bait by prebaiting with nontoxic grain; Absorption of moisture and physical degradation as reason for rats' reduced acceptance of pellets.

Discusses various aspects of RANDSEL, an interactive computer program used by the National Wildlife Research Center's Hawaii Field Station as a quick and easy method for assigning animals to treatment groups while addressing statistical concerns and meeting regulatory record-keeping requirements. Mechanics of operation; Computer compatibility; Installation; User benefits.