Topics in Subtropics

The polyphagous shothole borers (Euwallacea sp.) that spreads fungal diseases (Fusarium sp. and possibly Graphium sp.) to susceptible trees in Los Angeles County have now been found in mid and northern Orange County and western San Bernardino County.

This is an update on our recent findings on PSHB/Fusarium dieback. As of October 4, 2013, PSHB/Fusarium dieback was detected in Glendora in northern Los Angeles county and Laguna Niguel in southern Orange County.

This just in from Cal Recycle pertaining to the movement of green waste in Southern California. Now with Asian Citrus Psyllid so widespread in that area and the spread of Polyphagous Shot Hole Borer, it is a good idea to consider carefully the source of green waste used for mulching.

I had a chance to talk to PCA Dennis Seaton a few weeks back. During the farm call, he mentioned that he was making a survey of leaf yellowing in his clients citrus orchards.

It shouldnt be news to local citrus growers and industry people that the Asian citrus psyllid (ACP) is being found with increasing frequency in the southern San Joaquin Valley. If this is news to you please follow the website at http://www.cdfa.ca.gov/plant/acp/ and/or sign up for U.C.