California Fish and Game today began poisoning a Plumas County lake in an attempt to eradicate the population of northern pike. Crews began dripping and spraying 300 gallons of rotenone on the creeks and other tributaries feeding Lake Davis. An additional 16,000 gallons of the organic poison -- deadly only to gilled creatures -- will be placed in the lake itself beginning Sept. 25. The poison will kill all the fish in Lake Davis, which will be restocked with native trout, according to Ed Pert, manager of the $16.7 million project. "If we don't get them this time, we will...