Having recently purchased a handheld 40x microscope I discovered that many of my trees hosted eriophyid mites. The symptoms are different from the mites Dan Foster discovered. It is my belief that his were rust mites, while mine were bud mites. Determining the species would have been impossible as they are microscopic, roughly the size of an individual leaf hair. Their size makes them very difficult to spot, even with a microscope.

I had been treating all new plants and cuttings with either soap or rubbing alcohol, but now knowing more about this mite I can say I was wasting my time. So I treated all plants in affected areas with either Avid, or Forbid (which is only labeled for non-bearing fruit trees). After 2 weeks I am seeing dramatic decline in mottling/spotting symptoms, while deformed branches seem to not benefit from the treatment at all and continue to produce deformed leaves. 

I also noticed an association between the brown spots on figs which many members, including myself, have reported seeing this season. The spots develop along with the leaf, they are not visible when the leaf first emerges.
 
 
 lower leaves of above
  I think the leaf below on the left shows a dramatic stop to the damage, having none towards the center and then a totally symptom free leaf.
   
  lower leaf of above, typical symptoms of high mite levels.
 
  Spots on leaves, spots on figs.
  Deformed growth remains unchanged by treatment
 Some plants were chopped back in an attempt to judge FMV transmission, several new growths emerge having both healthy and various levels of deformed leaves, deformed growths are removed. Spotting on these plants is completely gone, what i call a cure.  
I have also purchased Azatrol to vary the pesticide and avoid resistance, at this time I can no longer find mites and hope it stays that way. 

While I do not fully understand the issue, and hope to not learn any more about it through personal experience. I hope the evidence I have shown compels other members to investigate the issue. I will update semi-weekly, maybe.

Thanks Brent, great detective work!

Sevin dust?
Some love it some hate it.

I use it.


Doug

Have you seen any symptoms like that at all Doug? Sevin is a much more economical option... and you probably did get some mites this season. I apologize and am glad you do what you do.

p.s. forgot to say I chose to use targeted miticides to avoid hurting the good guys, they are fine so far.

Yes I have seen it.
I put the sevin in a ladies hose and sprinkle it on the
leaves. I try not to touch the stuff.
It works great on mites.
Doug

This is pretty amazing stuff. Thank you. My Brooklyn White has a branch that has grown slowly with deformed leaves and spotted fruit, it used to be the main branch of the plant! I also had some kind of mites earlier this year. I kinda hope this goes away next year, and doesn't spread to healthy trees. Studying it is beyond my capabilities right now.

Sevin should work because it is systemic, I think. Getting contact is impossible because they hide in the hairs and also in the buds. 

Rafael, just treat them with something if you suspect any of those symptoms might be spreading. Sample sizes of Avid and Forbid are available on eBay and neem should work also, although it will take longer and need to be applied regularly. You can buy a cheap microscope, but unless there is an infestation it will be very difficult to find them. I was unsure the spotting was a symptom of the mites at first because I often could not find a single mite on less affected plants.
I saw these symptoms last season but they were not as bad and did not affect so many trees. I thought they were caused by rust or some other fungi. These mites are spread through plant to plant contact, wind, and growers. I think they most likely survived on a plant I kept inside for the winter but they could have also survived in cold storage.

Brent,
If you have a mite infestation, you may want to treat with miticide instead of Sevin. Insecticidal soap and increased fertilization may also provide a better solution to reduce the infestation and increase the health of the plants. Good Luck.

Quote:

 pnspidermites.pdf ,
Spider mites frequently become a problem after applying insecticides. Such outbreaks are commonly a result of the insecticide killing off the mites’ natural enemies but also occur when certain insecticides stimulate mite reproduction. For example, spider mites exposed to carbaryl (Sevin)...

I am looking for eradication Pete, but Avid and Forbid are both miticides, I made the change above. Oddly enough all of the bindweed crawling into the greenhouse was infested with spider mites prior to my treatment and I have not had an issue with them on any figs.

Incidentally Dr. Bronners was the first thing I tried and it had zero effect.

I think you made the right call. I think in our climate though once we head into fall these won't survive storage.

Neem oil and Avid took care of them for me last year.

Haven't seen them return this year. The damage you were seeing looked pretty similar to what I saw. Thanks for sharing. I don't feel so alone now. I think it takes courage to throw it out there that you have something like this, but we all benefit from the knowledge that you gained and then shared.

Thanks Dan. I appreciated you sharing your experience also. It is a lonely feeling for sure and hope it does help others out who find themselves in trouble. 

Brent have you seen difference in new leaves after using Mitecides?

Pete S. is right on increased nutrition in watering , I have seen great improvement on all my leaves, minimal patching and darker leaves.
I was told in several occasions that those (discoloration looking) patches were not FMV. FMV has very unique border connection lines , thus called Mosaic.

Yes Aaron the spots GO AWAY.

I might use it at the End Dormancy, just incase my figs have some.
What do these mites rook like?

Aaron, they look like eriophyid mites.

Great work Brent. I've got some with mottled leaves on a Sal's, I thought it was FMV. I'll try treating with Neem or soap. I think I have bottles of those still.

If I understand you, they should not survive the winter in cold areas and would need to be introduced from indoors? Regardless, I'll watch for symptoms in spring.

Thanks for the great work.

What sevin does not kill, malathion will..

Have fun Brent, you'll get rid of them.

Doug

Great work, Brent!  Maybe I need to investigate myself.

brent, i don't understand. are you saying those blotchy leaves in the pics were truly not fmv?

The symptoms increase in severity with the number of mites present, and subside once the mites are gone. I can't say for sure that it is not FMV, the mites could be spreading it around the plant faster than it can move itself. 

Brent,
What is your potting mix and fertilizing schedule? Thanks.

I've had mites on small cuttings indoors, where they damage young thin leaves, but have not had any visible damage to older healthy plants outdoors. Usually they are washed away by rain or water spray, but they were spider mites.

Pete the mix varies a bit from batch to batch but most are in a mix that is roughly 3-1-1 PBM-Promix-Compost +amendments. I do not keep a fertilizer schedule but usually give them some liquid organics weekly and something solid monthly. I do not think it could be nutrient related, aside from what looks like mild Mg def shown in the mantis pic, which could also be FMV.

p.s. pics 7 & 8 show a tree planted inground. 

Brent,
Thanks for the reply, and your schedule of weekly Liquid and monthly Solid fertilizer feedings.

I've posted about my observations that Rust will sometime inoculate young leaves and cause blotching as the leaves grow and age, http://figs4funforum.websitetoolbox.com/post?id=6035851

IMO, if the trees are given enough initial balanced nutrients the blotches are reduced, the rust inoculation is slowed and can be treated with fungicide... My schedule for growing fig trees has been to first provide Balanced nutrients for healthiest growth and reduced Leaf Mosaic Symptoms, then to separate the cultivars that do not respond to this treatment, so far there are no cultivars that continually produce blotchy leaves. There are a few cultivars that continue to show Leaf Mosaic symptoms, FMD when the leaves are back lighted, this may indicate FMV infection.

BTW, There is lots of posted anecdotal evidence that FMV may affect the absorption of available nutrients, and that increasing the available nutrients (fertilizing or "over fertilizing") may result in healthier and faster growth with less FMD symptoms.

http://www.domyownpestcontrol.com/sevin-concentrate-p-1594.html

Liquid sevin.

Same active ingredient as the powder.
Looking at what it controls, your mite is on the list.

It does make sense the powder could control and get rid of leaf sucking mites.

Worked for me.
I rarely use a pesticide but I do dust if there is a noticeable problem.

Doug

Pete, I never did see any rust nodules on my plants, so I think the pics I showed in your thread displayed these same symptoms for the same reasons. It occurs to me that your affected plants could have had both rust fungi and eriophyid mites, unless you carefully scanned those affected leaves and buds with a microscope the mites would have gone unseen. The symptoms could have reduced from both the dilution of mites over a larger area (increased growth) and possibly cooler weather limiting their reproduction speed. Predatory mites could have had a positive impact as well. 

I don't know to what extent the virus spread but it seemingly did as some seedlings appear infected. In the last pic of the first post for example.

Doug, I am not sure if mites can become resistant to Sevin but you should probably get something else so you can alternate treatments. Mites are apparently fast to become resistant to pesticides because of their short life cycle. They might be able to survive winter in your climate, especially in low buds covered with mulch. Spraying at bud break is probably the best time to get the overwintered females.