Spider mites on dendrobium?

[Mountain Kat]

Spider mite damage? I don’t see any webs. On dendrobium noble and microchip. My tolumnia are also yellowing. Help!

[rbarata]

In my oppinion those are mites.
Not all mites species produce webbing.
But the treatment to erradicate them all is the same.

[Mountain Kat]

2% mineral oil in water? Other? I’m not against insecticides.

[rbarata]

Once you get mites it's almost impossible to get rid of them for good.
A solution of 5 to 10% in volume of dish washer detergent plus 5% max alcohol sprayed all over the plants, especially on the underside.
Repeat every 5 days for a month.

If you can buy an acaricide then do it (here one need a special permit to buy them).

[camille1585]

Mites are hard to get rid of? I had some (2 spotted mites) on a Den last year, I wiped down all the leaves with rubbing alcohol twice at one week intervals, and I haven't seen a mite since.

Bizarrely enough, I had a Den with very similar damage as the first Den pictured when I put it in too bright a spot. A few leaves burned, and many other leaves developed mite-like damage, and probably would have burned if I hadn't moved them plant.

[rbarata]

Climate/environment is a key factor in their appearance and erradication. Under my conditions they are a certainty every summer. I believe they are there in winter too but with a residual population, which is enough for their outbreaks in summer.

[estación seca]

They are native or naturalized in many places outdoors.

[sam1147]

If you wish to completely get rid of them you should use an Acaricide. I recommend one that contains 'Abamectin'. There are few (Avid ..).Use according to instractions .You can mix with 5% oil .

[Dollythehun]

I had similar damage on the same type of dendrobiums. I wiped down the leaves on the underside and never saw any spots or streaks. I assumed it was mites and so I continued to spray a with dish soap and alcohol solution, until I actually damaged the leaves by the treatment. I started to use Bayer three-in-one, alternated with azamax. But now I doubt that I ever had mites. I think it was a combination of too much light and not enough water. Those are just my two cents. My problem seems to have stopped but I increased my watering dramatically and have sprayed every week with something.

[PacodeLucia]

I agree with using Abamectin....Also there are a few others. Please check out my blog on how I treated mites in in the root zone.

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