Growers and PCAs in Santa Barbara County can submit their samples through local Ag Commissioner's office units to the plant pathologist, Heather Scheck.  Submit the whole plant at least with some new growth and symptoms of infection.  Testing is free, but can take a few days to weeks which is typical for identifying plant pathogens.

Since there is no treatment for the pallidosis-related decline (fungicides and fumigation do not work) and there is not much that can be done about the pollen-transmitted viruses, vector management is the key to address this issue.  Managing aphids and whiteflies remains to be the only option for us now.  Adopting good agricultural practices, communication and collaboration among growers and PCAs can help limit the spread of the vector and the pathogens.  Using clean transplants, regular monitoring, timely application of effective and safe pesticides, rotating chemical pesticides with different modes of action, alternating with botanical or biopesticides, conserving natural enemies, timely control of pest infestations in fields upwind, timely diagnosis of the pest or disease are among the available options.

Additional information about aphids, whiteflies, and pallidosis-related decline can be found at:


Whiteflies (Handout in English and Spanish)

Pallidosis-related decline (Previous article)


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