Hostas forum: Hosta Nematodes

Views: 671, Replies: 10 » Jump to the end
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 7, 2017 10:00 PM CST
I think some of my hostas have these. I noticed it last summer but didn't know what it was, thinking it looked like sunburn. Well it is way too early in the year now for that. So I have decided that it is damage from nematodes. Any tips on at least controlling them, tried google but as near as I can tell there are differing opinions on what to do, but all agree they are basically impossible to irradiate. Shrug! Sure looks unsightly Grumbling
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 8, 2017 8:38 AM CST
I will post some pics later of what I am seeing on some of my hostas. I am wondering if cutting off the affected leaves is enough to keep it under control? One of my hostas has it on almost every leaf, thought I may be able to just cut off the parts where it is instead of cutting off the entire leaf. Otherwise poor thing would be bald Crying
Name: Rose
Oquawka, IL (Zone 5a)
Garden Photography Echinacea Dahlias Clematis Region: Illinois Hibiscus
Heucheras Charter ATP Member Birds Hummingbirder Hostas Celebrating Gardening: 2015
Image
Rose1656
May 8, 2017 1:25 PM CST
I read that there is now a fungus that looks a lot like nematode damage... another challenge for us gardeners! I've cut damaged leaves off, and the leaves looked fine the next year. I did the leaf in the water dish and magnifying glass thing, but never saw any nematodes. So, I'm not sure if cutting the leaves off will help if you have nematodes. What do you have to lose though?
Name: Ann
Ottawa, ON Canada (Zone 5a)
Hostas Charter ATP Member I was one of the first 300 contributors to the plant database! Composter Region: Canadian Clematis
Canning and food preservation Container Gardener Annuals Herbs Seed Starter Vegetable Grower
Image
ViolaAnn
May 10, 2017 5:26 AM CST
You won't see nematode damage at this time of year. In my zone 5a, it starts to show up around the end of July, beginning of August. Could be a bit earlier for you, but the beasties are dormant in the soil over winter and have to get into the hosta (or other plants), and start chewing. If you are watching carefully, you will see some leaves start to get yellow between veins before they turn brown. You may have the fungus. If you do, a fungicide and a good clean-up would be in order as well as ensuring that the plants have good circulation.

Re nematodes, I've had good success with a couple of plants simply digging them very early in the season, washing the roots well, soaking in a weak solution of Pine-Sol and water and then replanting in clean soil. Obviously not a practical solution for an entire garden though.
Ann

Pictures of all my hostas, updated annually and tracked since 2008 begin at: https://violaann.smugmug.com/G...
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 10, 2017 10:52 PM CST
ok, here are some pics of what I am seeing

Would love anyone's thoughts.
Weather, early spring, some cold nights even the the day temps have been unseasonably warm, broke some records there.
LOTS of rain, however on the east side of my house where these are, they don't get alot of rain, so they have ample moisture but they have not been saturated, sitting in water or anything like that. The only thing I have sprayed them w was a mixure of liquid fabric softener and water to try to keep the deer from eating them. No fertilizer this spring, did toss out some slug pellets, but I use those every year and this is the first year I have noticed this damage (last year I noticed something like it but it was later in the summer and I passed it off as sunburn).


Thumb of 2017-05-11/Frillylily/f367a3




Thumb of 2017-05-11/Frillylily/9ce8fc




Thumb of 2017-05-11/Frillylily/5d4e65

Name: Rose
Oquawka, IL (Zone 5a)
Garden Photography Echinacea Dahlias Clematis Region: Illinois Hibiscus
Heucheras Charter ATP Member Birds Hummingbirder Hostas Celebrating Gardening: 2015
Image
Rose1656
May 11, 2017 6:02 AM CST
That looks like weather related issues to me. Some of mine have almost transparent leaves due to the cold, wet weather...
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 11, 2017 7:14 AM CST
well they leafed out fine and did this seems like right over night. Sad
Name: Rose
Oquawka, IL (Zone 5a)
Garden Photography Echinacea Dahlias Clematis Region: Illinois Hibiscus
Heucheras Charter ATP Member Birds Hummingbirder Hostas Celebrating Gardening: 2015
Image
Rose1656
May 11, 2017 10:12 AM CST
Did you have chilly night temps after they unfurled, or cloudy cold days? If so, that's probably the problem. Like ViolaAnn said earlier... nematode damage doesn't usually show up until later in the growing season.
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 11, 2017 10:19 AM CST
Yes, our weather has been crazy!
The large leafs look almost like the flesh of the leaf 'inside' is gone, and just a shell-like structure is left. There are no holes in the plant, like it is gone from the inside. Not sure how to explain that so it makes sense. I really do hope it is weather related and that is all. Crossing Fingers!
Name: Ann
Ottawa, ON Canada (Zone 5a)
Hostas Charter ATP Member I was one of the first 300 contributors to the plant database! Composter Region: Canadian Clematis
Canning and food preservation Container Gardener Annuals Herbs Seed Starter Vegetable Grower
Image
ViolaAnn
May 11, 2017 9:20 PM CST
The second one looks like 'Frances Williams' to me. It is notoriously susceptible to spring desiccation burn and I think that is what you are seeing. It can affect the plant even in shade, but is sometimes worse than at other times.

For the others, I would agree with the assessment that it is weather related. Sometimes if a spring is cool and cloudy and you suddenly get strong sun before the trees leaf out, you can get issues like that. But bottom line, I don't think it's a virus or nematodes.
Ann

Pictures of all my hostas, updated annually and tracked since 2008 begin at: https://violaann.smugmug.com/G...
springfield MO area (Zone 6a)
I was one of the first 300 contributors to the plant database! Plant Identifier
Frillylily
May 12, 2017 8:05 AM CST
Yes it is Frances Williams. It is on the north side up to my house and gets basically no sun whatsoever Shrug! The others only get morning sun on the east side, have evergreens there so no issue w the leafing out. I am thinking Francess Williams will be sentenced to the compost if it looks like this next year. Thumbs down Plenty of other things to grow that don't look like that right out of the shoot. I am glad to hear that no one thinks there is a real problem though w the hostas that is peace of mind. We have had tons of rain (setting records, flooding ect) so fungus may still be a question, but I think that would be treatable w a spray? and will at least go away when the weather heats up and dries out I would think.

Thank You!

« Garden.org Homepage
« Back to the top
« Forums List
« Hostas forum
You must first create a username and login before you can reply to this thread.

Member Login:

Username:

Password:

[ Join now ]

Today's site banner is by ge1836 and is called "Blanket Flower Amber Wheels"