The Los Angeles urban infestation of Asian citrus psyllid has reached such a large size that it is no longer being treated with insecticides by the California Department of Food and Agriculture. The psyllid has spread eastward into Riverside and San Bernadino counties and is affecting some commercial citrus there. It is likely to spread westward into commercial citrus in Ventura and northward into the San Joaquin Valley this year.
I have added a page to my web site http://ucanr.org/sites/KACCitrusEntomology/Home/Asian_Citrus_Psyllid/Management_420/ACP_Effective_Insecticides/ under the Asian citrus psyllid management tab that discusses some basic principles on how to choose the most effective insecticides for psyllid control. It also lists the mode of action of each insecticide so that you can think in terms of rotating insecticides and avoiding resistance.
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