WEATHER »
This small, stingless wasp likes to munch on the Asian citrus psyllid, which can infect trees with the deadly Huanglongbing disease

Paul Wellman

This small, stingless wasp likes to munch on the Asian citrus psyllid, which can infect trees with the deadly Huanglongbing disease


Citrus Psyllid Predator Released in County

Bug v. Bug War Continues Against Disease


Armed with a small jar of Tamarixia radiata, David Morgan of the state Department of Food & Agriculture popped the top and released hundreds of the tiny, stingless wasps near a lemon tree in Carpinteria on Friday.

Calling the release a type of “snack and go,” Morgan described how the tiny predator would move through the tree and others nearby searching for the Asian citrus psyllid, an equally small insect known to carry a bacteria that has been decimating citrus trees from Florida to Brazil. With no cure in sight, orchard growers and agriculture officials have resorted to spraying with pesticides and are also looking at biological controls like this one.

Another parasitic wasp, Diaphorencyrtus aligarhensis, was recently approved for release, and Morgan stopped in Santa Maria to release a few more vials’ worth as part of a small experiment. Describing the two types of wasps as no larger than a period on a page, Morgan said they didn’t fly very far because they would get lost. The project has been releasing them every few miles from Imperial and San Diego counties up to Santa Barbara and Ventura counties to see if they’ll become established.

As they munch their way through the citrus psyllids they find and lay eggs on them, neither wasp is expected to eradicate the pest, as an insecticide would, but will reduce their population and any bacteria they might carry.

Morgan added that the best way to keep the good bugs around, which only live for about a week, is to keep insects like ants away. Ants tend to eat beneficial insects like these wasps, he explained, and are attracted to the sugars excreted by the psyllid.

Since the Asian citrus psyllid was discovered in California in 2008, psyllids infected with the bacteria that causes Huanglongbing disease, or citrus greening disease, were first located in Hacienda Heights in Los Angeles in 2012. A handful of these psyllids have been found in Santa Maria, Santa Barbara, Goleta, and Carpinteria, but none were infected.

To submit a comment on this article, email letters@independent.com or visit our Facebook page. To submit information to a reporter, email tips@independent.com.



event calendar sponsored by:

Santa Barbara Rental Prices Have Skyrocketed Over the Last Five Years

The average rent for a South Coast studio is $1,553.

Trio Stops the Show at Board of Education

More than a dozen appeal to Santa Barbara Unified School District to maintain music classes and programs.

Santa Barbara District Attorney Endorses Villaraigosa for Governor

Joyce Dudley preferred the former Los Angeles mayor’s positions on crime and education.

San Marcos Principal Files Suit Against Santa Barbara Unified School District

Ed Behrens charges emotional and physical distress due to demotion.

City Water Use Hits 1958 Levels

Population was twice today's; revenue close to falling short of expenses.