California Scientists Release Citrus Psyllid Predator

Tamarixia radiata

California scientists just released the Tamarixia radiata - a predator wasp that attacks our dreaded Asian citrus psyllid.

UC Riverside Executive Vice Chancellor Dallas Rabenstein and Mark Hoddle, the director of the Center for Invasive Species Research, released Tamarixia radiata – tiny, stingless parasitic wasps that lay eggs in ACP nymphs – in a citrus grove near the UCR Botanic Gardens. A total of 281 wasps (95 males and 186 females) were released.



Over the next several years, UCR and California Department of Agriculture Food and Agriculture (CDFA) scientists will raise thousands of Tamarixia for release throughout California. The Tamarixia larvae will eat the ACP nymphs, killing them, and emerge as adults about 12 days later. Adult female Tamarixia also eat other ACP nymphs, killing many in the process.

Read more.

Management of Asian Citrus Psyllid - IFAS

Tamarixia radiata - life cycle - Cornell

Why Are My Citrus Leaves Curling?

Got Aphids?

With over 1300 species of aphids in North America, it shouldn't be a surprise to you that you find them in your garden.

When I get aphids in my landscape, it's usually on my asclepias tuberosa or butterfly weed, which can handle a few aphids.  I'm fortunate enough to catch them in time to spray the water hose on them or natural predators - like lady beetles -  to have their way and they do disappear.  If you are faced with sooty mold or a declining plant because aphids are so damaging, then you have to use stronger methods to eradicate them, such as pyrethroids or horticultural oils. Always follow instructions on the label.  Try not to stress, aphids are everywhere and you can get rid of them.

IFAS publications:

Aphids On Landscape Plants

Aphids on Florida Citrus

Citrus Tree Leaves Are Curling

Teresa:

My lemon and grapefruit leaves are curling and it looks like a snake design on the leaves.  Could you tell me what this could be.  Thank you.

Barbara

The squiggly lines and curled leaves are an indication that your citrus trees have had a visit from citrus leafminers. Now... once you see the damage, the moth has laid its eggs, the larvae have hatched and are gone and there's no reason to use a chemical. There are parasitoid biological controls in Florida.

Leafminers like new tender foliage. It doesn't hurt the citrus tree or the fruit but can be a problem for young trees trying to leaf out. As your citrus trees get new leaves, you can spray with Bayer Advanced Fruit, Citrus, and Vegetable Insect Control.  It provides from one to three months of protection from the insects. Follow the instruction label to make sure that you have the best effectiveness.

Make sure you're fertilizing your citrus on a consistant basis every three to four months with a balanced fertilizer with micro nutrients.

Leafminers can also attack ornamental plants and vegetables. Make sure that the insecticide you use is certified for home use and edible landscaping.

"In Your Backyard" - Six More Weeks of Winter

Pennsylvania's favorite groundhog 'Puxatawny Phil' saw his shadow this morning. The old wives tale follows that there will be six more weeks of winter! But we knew that already experiencing La Nina's cold, wet rain this season. This has been the coldest, wettest Florida winter in years damaging thousands of Florida landscapes.

Puxatawny Phil has a distant cousin here in Florida that also causes landscape damage. Called the Southeastern pocket gopher, this little 10-inch rodent is the culprit behind all those 'sandy mounds' in your bahia lawns and on the side of the highways. They can be beneficial in aerating the soil but usually they are not appreciated when they eat your plant roots, bulbs, and tubers.

You can get rid of pocket gophers by trapping and killing them, but poisoning is against the law unless you have a Florida state permit. All the old wives tales of Wrigleys chewing gum and moth balls are ineffective.

Moles in your landscape can be seen as a problem, too but they are insectivores and rarely affect your plants. Seeing mounds in their St. Augustinegrass or bahiagrass lawns, homeowners are quick to blame the little creatures who just eat the grubs and insects attacking the turf.
Getting rid of moles in your landscape involves getting rid of their food souces. Check to make sure that you do not have active grubs or other insects. If you have them, spot treat the areas with a recommended pesticide. Once their food source is gone, the moles will move on to other not-so-green pastures.

More creatures that you might see meandering through your yard during dusk and early morning are racoons, rabbits, and oppossums. Our brave warrior Scotties treed this poor oppossum Sunday night. They were so proud of themselves. Thankfully, the oppossum didnt play dead and fall out of the tree.

Puxatawny Phil isn't so prescient. Here in Florida, we can always expect our last winter freezes before the middle of March - six weeks away. You can prune back your brown, freeze-dried foliage now. Some of my plants looked like they were okay for two days after the freeze, but as you can see this tropical Mamay Croton was affected severely.

Maybe spring is closer than we think? Did you see the thousands of orange-red breasted American robins come through Central Florida yesterday? Chirping and enjoying the warm drizzle, the spring-harbingers were as happy as larks. We will be talking about how to attact robins and other birds to your yard today on the show!

Call in with your garden questions! Listen live at 11:00am here.

Redbay Ambrosia Beetle threatens Florida's avocados.

Read an archived Jan-Feb-Mar Newsletter.

Juvenile Robin

Cardinal enjoying the raindrops in the pine tree!