By Marshall Johnson
S
panish missionaries introduced olives to California about 200 years ago. California’s olives are used for consumption (i.e., table olives) and to produce extra fine oil. California produces greater than 99% of USA grown olives with most of the table olive production in the San Joaquin and Sacramento Valleys. Olives for oil processing are mainly produced along the coast from Napa Valley to Santa Barbara. Until the late 1990s, the major insect pests
of olives were the olive scale,
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