I saw these in the grocery store today and bought some.  They taste old, like they have been sitting in storage too long.  Not good at all. 

Growers trying to sell premier varieties need to put some kind of controls in place to ensure old product gets pulled.  They are going to kill their reputation because people will try it once, think it is bad, and never try again.  The variance in fruit quality is massive even for single varieties.

I ordered some imidacloprid 21%z, and sprayed soap one more time while I wait for it.  If the scale reappears I will try the pesticide.

I've never heard of a Ichangquat, and I'd be interested in sampling one, but my experience so far with kumquats is that only fukushu, nagami, meiwa, and marumi are worthwhile unless you are specifically looking for extra cold-hardiness and are willing to compromise on taste/seedlessness. 

I believe a seedless fukushu would be the best fruit around.  Nordmann is great but nagamis have a very slight off taste that doesn't appear in fukushu, meiwa, marumi.

Btw, cut up kumquats in vanilla ice cream is amazing.

In another post somebody commented that the my variegated minneola looked like a type that would not produce the desired red-striped fruit, as the foliage is green/light-green instead of green/light-green/white.   My small tree produced three fruits, and none show any red striping.  I don't see any white on the new growth, either.  I suspect it will always be this way so I will dig it up and replace it with the green/light-green/white one that I still have in a container.  Harris sent me two because the first one arrived with heavy shipping damage the second was a replacement.  The first one recovered though so I ended up with two healthy trees, one of each type.

I have been battling the same CCS infestation for years.   I can control them but I cannot seem to eliminate them.   If I spray it kills them but more come back within a couple weeks.  My trees are in a greenhouse and CCS doesn’t live in this area so it’s not a reinfestation from outside.  I have tried ladybugs three or four times and they did not help at all.  The ladybugs sold online are NOT the famous vedalia beetles and do not seem to eat the scale.  I have looked extensively for a mail order source of vedalia beetles and found none.  If anybody knows one I would love to know.

The best spray I have found is soapy water.  I am using “dr bronners pure unscented castile soap” as it has no detergents.  I tried dormant oil (Bonide) also but I believe I mixed it way too strongly as it completely defoliated my guava and injured some other trees.  I have never had any issues with soap.  This was when I was messing with hose-end sprayers.  I’ve given up on hose end sprayers after trying three types and even customizing them.  They just don’t seem to work.

Spraying is such a chore for me that I am currently building a custom sprayer to make spraying the underside of leaves easier.

I would gladly use any number of chemicals to eradicate this infestation.  I am okay if it means not eating any fruit for some time.  If anybody has suggestions I’d love to hear them.  What pesticides are recommended for CCS? 

Its kumquat season again for me.   Not much has changed.  I still think the Indio Mardarinquats and Centennial variegated are far inferior to the nagami/marumi/meiwa types.  The nordman nagamis and fukushu are still great.   I didn't get much marumi or meiwa as the trees have been unhealthy.  Hopefully they'll bounce back soon. 

I ordered some more.   FYI its now called "Garden Phos" and no longer Agri-Fos

Brian, I doubt that the high humidity in your greenhouse has anything to do with your tree problem.   Humidity in my greenhouse, especially during the winter months sometimes causes "rain" to fall from the glazing.  On warmish days I turn on the exhaust fans to reduce the humidity.  However, over the 30 years I've had the greenhouse, I have never had a problem.  In Florida during the summer many days the humidity is 100 percent.  On Okinawa, when I was in the Navy, the humidity was near 100 percent the entire summer, no problem with the citrus.

Did you mean to respond to me other thread regarding the gummy areas near twig dieback?  If so thank you for the information, I have always worried about humidity and it is good to know it can be tolerable.

One of my fukushu kumquats has experienced signficant twig dieback in the past month or two.   This is the largest one I have, and the only kumquat I've planted in-ground in my greenhouse.  I noticed when cutting off the dead branches and inspecting the damage that there are blobs of gum at joints of the dead branches.  I've never seen this before, does this indicate anything out of the ordinary or is thjis common with twig dieback issues?

Now, I suspected the cause for the dieback was a rather severe cottony cushion scale infestation that I let go on too long while I fiddled with hose-end sprayers (I ultumately gave up and went back to a pre-mixed pump sprayer).   Its also possible that this is somehow related to the clay soil the tree is planted in, or the high humidity of the greenhouse.  However none of my other 40+ trees have this symptom, and many of them were infested with the same scale and sprayed for it at the same times. 

The kumquat is from Fourwinds, not sure which rootstock they used for kumquats.

http://tropicalfruitforum.com/index.php?topic=21243.msg260001#msg260001

Here’s the thread with the article.  I suspect this type of hack is the future of selective breeding

Of the trees I've owned that had severe dieback, about half died and the other half bounced back and are very healthy again.  With new soil your tree may recover in time.  Make sure the container drains well.

Mine is in a container in a heated greenhouse.  A container is probably good for you if you have any chance of frost in the winter.  I see your zone9 low temp is ~25-30F, so you should move it indoors if there is a frost advisory.

I use osmocote plus 25-5-15 (the pink bag, most common type) to fertilize, and a free draining soil mix.  You should change the container soil every year, and move it to a bigger pot then if the roots are circling around.

Also, you may have Citrus Greening disease on your area, aka Huanglongbing.  I'm not sure how widespread it is in Florida.