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Message
Advice for fungus
Posted on 4/3/20 at 9:58 am
Posted on 4/3/20 at 9:58 am
This camellia has never done well in my beds. Any advice on how to fight this fungus? It has good sun/shade, good irrigation.
This post was edited on 4/3/20 at 9:58 am
Posted on 4/3/20 at 10:07 am to USEyourCURDS
Is it drip line irrigation? I ask because you don't want to get the leaves wet. You can apply propiconizole for the fungus. There is also Lichen on the trunk. Lichen is an algae and a fungus not practicing social distancing. It is usually a sign that the plant is missing certain nutrients so fertilizer with micro nutrients should be used.
Posted on 4/3/20 at 10:10 am to ronk
quote:
fertilizer with micro nutrients should be used.
thank you, i have this same issue on one of mine, slowly losing him.
Can you recommend a brand?
Posted on 4/3/20 at 10:12 am to ronk
Wife’s been hitting it with a watering can from above for the past year. I just let her know.
Posted on 4/3/20 at 11:00 am to USEyourCURDS
quote:
There is also Lichen on the trunk. Lichen is an algae and a fungus not practicing social distancing. It is usually a sign that the plant is missing certain nutrients so fertilizer with micro nutrients should be used.
The heavy growth lichen on the camellia does indicate an issue with the plant, ranging from excessive water (camellias like azalea do not like wet feet otherwise can can suffer from root rot), soil pH that is too basic - camellia require an acidic soil (pH 5 - 5.5) to thrive, too high of a pH can deprive the plant of micro-nutrients even if they are present in the soil, and perhaps a disease/fungal issue, and perhaps all 3.
Does the landscape drain well? The bush requires only the equivalent of 1 inch of water a week, includes any contribution from rain. One good soaking weekly in the absence of rain should be sufficient. You can kill a plant like a camellia or azalea as quickly from too much water than lack of water.
If you don’t have a soil pH analysis of that bed you should have one done (unfortunately the LSU Ag Center soil testing lab is not operating for the time being). You can apply some elemental sulfur around the plant if you think your soil pH is to high - but that will take several months to work. In fact I bought a 50 lb bag of sulfur a week or so to spread around azaleas and camellias I have in landscape beds where I know soil pH is around 7ish. You could add alum (aluminum sulfate) or iron sulfate to quickly lower the soil pH but I hate to recommend that in the absence of a soil pH analysis, but you can certainly do that if by chance you have a lawn pH measurement which shows the soil is basic.
And with regards to the micro-nutrients as ronk suggested, you could purchase an azalea and camellia formulated fertilizer (Fertilome has one, but there are other brands) and they will have micronutrients incorporated into the fertilizer.
Probably some of branches that have no leaves are probably dead - you know how to check? Scrape the bark back a little and look for green cambium layer underneath the bark, if it is brown under the bark the branch is dead so go ahead and remove it. Remove branches/twigs growing into the interior of the plant, whether they are dead or not. Open it up to allow for good air circulation and light penetration into the interior.
Then wait, and give it time where it hopefully recovers. As you know camellias grow slow so you are not going see quick results.
This post was edited on 4/3/20 at 11:22 am
Posted on 4/3/20 at 11:56 am to CrawDude
Yes thank you. That area drains fine though it was probsbly overwatered last summer. I will look into those fertilizers for sure. Do I apply fungicide to the leaves or roots?
Posted on 4/3/20 at 12:50 pm to USEyourCURDS
quote:
Do I apply fungicide to the leaves or roots?
I’m no camellia disease expert, what I know about it is from reading. Fungicides can be contact (spray plant/leaves).or systemic - absorbed by the roots and translocated by the plant.
You might read this article by Dan Gill and start with a simple copper spray LINK particularly if this describes what you have observed. It will also help with the lichen, which in itself is not harmful to the the camellia, but when heavy on the plant appears a bit unsightly.
I have shi shi gashira camellias in the landscape (Louisiana Superplant) that give no me no issues, and one Camellia sasanqua (Daydream cultivar) with which I’ve had problems similar to yours, not quite as bad (based on your photo).
I have good drainage but basic soil. So I do use elemental sulfur around the plant in the spring, followed a dose of Copperas (ferrous sulfate) to increase acidity, use an acidic fertilizer, and I prune to remove to remove dead branches and inward growing branches. I do sometimes spray with copper - not often. All those activities keep the camellia looking decent.
ETA: looks like you have a camellia sasanqua based on the leaf size. Sasanqua’s tolerate more sun than the japonicas but still like some afternoon shade. Some of your issues may be related to too much sun, all day sun if you are getting 8+ hours, but perhaps not. I think mine gets a little more sun than I’d like but not much one can do about that after the fact. From what I know now I would choose a different shrub for my location, but it grows well enough and flowers well enough in fall to keep it.
This post was edited on 4/3/20 at 5:36 pm
Posted on 4/3/20 at 1:09 pm to CrawDude
It probably gets just over 8 hours of sun. I just spread Lesco 14-14-14 on it and some dwarf azaleas in my beds. Hopefully that helps.
Posted on 4/3/20 at 1:30 pm to USEyourCURDS
you could also check with the Hammond Ag Center, they do camellia research and are always eager to help
Posted on 4/3/20 at 1:31 pm to cgrand
Thanks, C! They do any soil testing?
Posted on 4/3/20 at 3:00 pm to USEyourCURDS
you have to send off for a soul test kit but the Ag center processes the kit. It’s on their website I’m pretty sure
If you’ve not been to the Hammond station it’s worth a visit (non COVID). It’s on old Covington just south of 190. My house is about a 1/4 mile from there so you can drop off beer on your way
If you’ve not been to the Hammond station it’s worth a visit (non COVID). It’s on old Covington just south of 190. My house is about a 1/4 mile from there so you can drop off beer on your way
Posted on 4/3/20 at 7:04 pm to cgrand
you got it. I know where it is, just never done much exploring over there. Really pretty area.
Posted on 4/3/20 at 7:36 pm to USEyourCURDS
You need to check the underside of the leaf. It looks like it has a scale infestation that would cause the sasanqua to slowly decline in health. It can cause stem dieback and eventually affect the health of the whole plant
Posted on 4/3/20 at 7:53 pm to Daponch
quote:
You need to check the underside of the leaf. It looks like it has a scale infestation that would cause the sasanqua to slowly decline in health. It can cause stem dieback and eventually affect the health of the whole plant
Good advice - looking at my one taller sasanqua earlier today and noticed what I think was some older scale damage, think I’ll treat it with some systemic insecticide. But I also took the time to follow my own advice in my earlier post - pruned about 20% of foliage to open it up, fertilized, and applied both elemental sulfur and ferrous sulfate, and sprayed with copper.
Posted on 4/3/20 at 8:49 pm to Daponch
I will check tomorrow. Can you recommend a specific insecticide if that is the case? Y’all are a wealth of knowledge. Thanks!
This post was edited on 4/3/20 at 8:50 pm
Posted on 4/3/20 at 9:29 pm to CrawDude
Craw, I saw a soil ph test kit at Lowe’s the other day. Are they pretty accurate?
Posted on 4/3/20 at 9:39 pm to USEyourCURDS
I like to use a systemic insecticide for activities where if is difficult to spray, particularly the undersides of leaves. I personally use imidachloprid, b/c I can use on it on multiple trees and shrubs as a soil drench. This is what I’m currently using LINK. A little goes a long way. A bottle like this can easily last a few years. Read the label, on soil drench for trees and shrubs. I think I ordered it on Amazon, couple years ago, still have plenty left.
Couple brief articles on scale and options for treatment.
LINK
LINK
Couple brief articles on scale and options for treatment.
LINK
LINK
Posted on 4/3/20 at 10:01 pm to USEyourCURDS
I’ll be honest my suggestions are never cheap. My herbicide and fungicide suggestions are usually expensive. Just to stay in line.....Altus insecticide. Contact and systemic insecticide that is also bee friendly. It’s fantastic.
This post was edited on 4/3/20 at 10:06 pm
Posted on 4/3/20 at 11:52 pm to LSUEnvy
quote:
Craw, I saw a soil ph test kit at Lowe’s the other day. Are they pretty accurate?
Was it this one LINK? I have far more confidence in the reliability of wet chemistry kit such as this kit than the inexpensive pH probes that stick in the ground. The pH measurement with the kit should be fairly accurate, within a 0.5 pH unit and that’s close enough in the absence of no data at all.
For $11 sure I’d buy one and use it - but just for the soil pH measurement - not so much for the N, P, and K analysis. Then when the LSU AgCenter soil testing lab re-opens for business you can have them to conduct a more accurate and detailed soil fertility analysis for about the same cost.
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