Later today, I’m giving a brief presentation and report at one of our groves on Early Pride dieback. We’re using two documents: 1) a pamphlet going over our experience in managing the problem, and 2) a paper co-authored with USDA on Early Pride. Here’s the link to both documents.
One of the symptoms we see in citrus greening disease is the rotting of fruit on the tree. In this example, an orange has died, dried out, and has become infected by what is probably a fungus. This fruit will soon fall from the tree.
• Aperture:ƒ/2.2• Camera:iPhone 6 Plus• Taken:November 29, 2016• Focal length:4.15mm• ISO:32• Shutter speed:1/1199s
One thing we’ve noticed in our area Florida is that some grapefruit groves seem to do well, even in the shadow of citrus greening disease. Many of our young grapefruit trees look green and healthy. We’d like to see more production, and hopefully that will come soon. The photo shows healthy-looking trees in the Lakeland area. If you get closer, you do notice a few minor signs of disease in the leaves here and there. But overall, you’d have to say this grove looks pretty good. Time will tell, though, because we’ve seen anything can change on a dime with this disease.
Alturas, Florida, has been hit hard with citrus greening. Trees in groves continue to be removed at an increasing rate. This photo, next to one of our groves, shows the devastating result of this disease. At least the risk of transmission of disease to our grove is reduced once this grove is taken out.
Several days ago, we noticed that fruit and leaf drop are beginning again. From what I can gather, this might be some of the first of the season, at least in our area in Central Florida. This is the same sort of drop we’ve seen the past couple of years at about this same time. It’s hard to pin down a cause, but it seems the fruits and leaves most affected by this drop are affected with greening symptoms. Here’s a quick drive through video of several trees to give you a general idea what we’re seeing in the groves. The video is after the jump.
• Aperture:ƒ/1.8• Credit:Steven Rogers• Camera:DMC-LX7• Taken:October 1, 2014• Copyright:© 2014 Steven Rogers Photography All Rights Reserved• Focal length:4.7mm• ISO:80• Shutter speed:1/125s• Title:Lake Hancock Fruit Drop
We completed our Tamarixia work this week and we’re now at 177,400 wasps released! We’re pleased with the way this project is going.Our custom app, Tamarixia Tracker, helps us get the information back to the state quickly. In fact, we often have our report data tabulated and sent to the state within an hour or so of completing our release work. Here’s a sample report if you’re interested checking out our results. Download our Tamarixia Release Report.
WORKING DRAFT VERSION
In the first post in this series last week, I reported on some of our management success in controlling dieback in Early Pride citrus. I took a look at the symptoms of the problem and examined the progress of the disease over the course of a year in a new block we planted. Although I didn’t go into detail last week, I made the point that most of the dieback we saw was due to some sort of physical trauma. This week, I’ll take a detailed close-up look at those symptoms, and illustrate how I came to the trauma conclusion. In my next report due later this week, I’ll go over the findings of the USDA regarding secondary pathogens, and the treatment programs we used to help contain the problem in our grove.
Early Pride is a relatively new licensed citrus variety that’s being planted more often in Florida. It’s popular as a fresh fruit because of its early season maturity, large fruit size, deep orange color and sweet flavor. If you’re thinking about working with Early Pride, there are some things you need to know about its tendency for dieback in leaves, twigs and shoots. From our recent experience, the dieback seems manageable, but there are some things you should do to treat and prevent it. I tracked the development, causes, treatment and recovery of dieback in one of our groves over a year from when the trees first went into the ground to determine what are the causes and treatments for Early Pride dieback. Almost all the trees eventually recovered by following the practices we worked out.
This is Part 1 of two posts on managing dieback in Early Pride citrus. This first post discusses symptoms and disease progress, and Part 2 will cover causes, treatment and recovery. This post will be updated as more information comes in. The last updates were on September 17, 2014.
• Aperture:ƒ/8• Credit:Steve Rogers• Camera:DMC-LX7• Taken:November 27, 2013• Copyright:© 2013 Steven Rogers Photography All Rights Reserved• Flash fired:yes• Focal length:4.7mm• ISO:100• Location:27° 56.251′ 0″ N 81° 53.307′ 0″ W• Shutter speed:1/80s• Title:Early Pride Dieback
Today, I had a chance to drive around the citrus groves in this area with some visitors from California. We talked about alternative crops, marketing, and variety licensing among other things. During the visit, we happened upon a section of one of the groves showing what I would call classic, textbooks symptoms of greening. Seeing the differences in the patterns in these symptoms can be subtle, but once you get accustomed to the general look, you begin to recognize them more easily. Here are eight examples we saw today.