Topics in Subtropics

  So, I've gotten a few calls lately about this vine with a big green pod that is growing in lemon trees. What is done with it and how do you get rid of it?  Where is it?  In your lemon tree, especially now that lemon prices are so bad, that orchards arent being looked at so closely.  The…

Registration Now Open For 2025 Post-Harvest ConferenceThe Citrus Research Board (CRB) is excited to announce the return of the Post-Harvest Conference on September 4, 2025, in Visalia, California, at the Visalia Convention Center. Sponsored by the CRB and organized in partnership…

Recently a request came in from a San Luis Obispo Master Gardener asking about some unusual mottling on orange leaves.  They didn’t follow a typical nutritional deficiency or fungal disease.  They actually looked like huanglongbing symptoms, but there was no history of Asian Citrus Psyllid. …

Or rather Verticillium Collapse or Wilt.  An avocado that goes down fast.It's that time of year to see some drama in avocado orchards. Once healthy-looking trees can suddenly turn brown in a weekend and all the surrounding trees still look fine. And it can be quite common in some years along the coast…

Citrus InformationDr. Robert McNeil, emeritus professor of the Fruit Science Department at Cal Poly San Luis Obispo, taught citriculture and avoculture there for many years.  He has made his citrus notes available on our website - https://ucanr.edu/sites/default/files/2025-07/mc%20neil%20citrus%20guide…