| high levels of exotic armored scales on imported avocados raise concerns regarding usda-aphis' phytosanitary risk assessment. | between 1914 and 2007, a quarantine protected california avocado, persea americana mill., groves from pests that might be introduced into the state along with fresh, imported avocados. soon after mexican avocados were first allowed entry on 1 february 2007, live specimens of several species of armored scales (hemiptera: diaspididae) not believed to be present in california were detected on 'hass' avocados entering the state from mexico. initially, the california department of food and agricultur ... | 2009 | 19610397 |