My mom sent me this picture of her kumquat:
I have identified citrus canker and citrus scab as the most likely culprits but she says the obvious symptoms are not all there. There are no conical raised sections on leaves (scab) and no yellow water rings around lesions (canker). I am not sure what else it could be or how else to differentiate.
Does anyone recognise it?
https://idtools.org/id/citrus/diseases/f ... rus+canker
https://idtools.org/id/citrus/diseases/f ... rus%20scab
-
- Green Thumb
- Posts: 532
- Joined: Sun Jan 13, 2013 6:52 am
- Location: South Africa
- applestar
- Mod
- Posts: 30550
- Joined: Thu May 01, 2008 7:21 pm
- Location: Zone 6, NJ (3/M)4/E ~ 10/M(11/B)
Aren't those scale insects?
Ah, here we go:
https://cisr.ucr.edu/california_red_scale.html
California Red Scale, Aonidiella aurantii
Ah, here we go:
https://cisr.ucr.edu/california_red_scale.html
California Red Scale, Aonidiella aurantii
yep, scale. There are probably ants nearby too.
I control the ants and use horticultural oil on the plant and a toothbrush. Scale can be scraped off if the infestation is light. Imodicloprid works well for a year, but I don't use systemics if I don't have to and I don't want to use it on anything I eat.
I control the ants and use horticultural oil on the plant and a toothbrush. Scale can be scraped off if the infestation is light. Imodicloprid works well for a year, but I don't use systemics if I don't have to and I don't want to use it on anything I eat.
-
- Green Thumb
- Posts: 532
- Joined: Sun Jan 13, 2013 6:52 am
- Location: South Africa
-
- Green Thumb
- Posts: 583
- Joined: Wed Jul 07, 2010 7:58 am
- Location: Northern VA, USA -- Zone 7a
I can't see the picture, but it sounds like others have identified it as scale. I get it pretty badly on my indoored meyer lemon in the winter. I take a wet paper towel and wipe off as many as I can, then spray with neem oil. That usually does the trick.
Now getting the lemons to grow to maturity is another matter altogether...
Now getting the lemons to grow to maturity is another matter altogether...