Daylilies forum: Pests!!!!

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Name: Sabrina
Italy, Brescia (Zone 8b)
Love daylilies and making candles!
Daylilies Cat Lover Region: Europe Garden Photography Garden Ideas: Level 1
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cybersix
Dec 16, 2015 8:56 AM CST
Hello everyone, since today is a bit less cold and I had a bit of time I checked my DLs.

They have pests. I took some pictures, I guess aphids are there... but I'm not sure.
I found some leaves with orange/brown signs, I can't recognize what it is.

Some environmental information: we get freezing cold almost every night, and by day the temperature is around 5° C. Today is 7°C and it's cloudy, it's almost two months that it doesn't rain. But the humidity is very high, the sun its the gardedn for 1 just 1 hour. I'm not watering DLs because the ground is always humid. Many DLs are putting new fans and have new center growth.
I didn't cut leaves because I wanted to see how the DLs acts in the cold, but if it's beneficial against pests I will do.
Any advice is really welcome, thanks for looking!
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Sabrina, North Italy
My blog: http://hemerocallisblog.com
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Dec 16, 2015 9:12 AM CST
In the last picture the white bits are clearer and do look like shed aphid skins. But aphids are not what is chewing the holes, that could be something like slugs, or caterpillars, I'm not sure what else you might have there. Aphids pierce the leaf and suck out the plant juices and those areas can turn brown (which may explain the brown areas) but they don't leave holes.
Name: Sabrina
Italy, Brescia (Zone 8b)
Love daylilies and making candles!
Daylilies Cat Lover Region: Europe Garden Photography Garden Ideas: Level 1
Image
cybersix
Dec 16, 2015 9:31 AM CST
I rarely go out with this cold, so I don't know who is living out there *Blush*
So aphids are dead, right? Do I have to spray something on the plants?

I found a lot of spiders, all clear color, running out from the center of the DLs, I don't know if they are just hiding from cold or what.

I don't see slugs or caterpillars, I thought with this cold all the living things in the garden would die.
I will force myself to out more often and see if I notice slugs or something else.

What should I have to do now? I have an insecticidal soap for aphids, is it needed now?
Many thanks!
Sabrina, North Italy
My blog: http://hemerocallisblog.com
Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Region: Alabama Composter Garden Photography Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
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Seedfork
Dec 16, 2015 9:46 AM CST
Looks like aphids to me, but they look alive in some of those photos, are they moving around?
But, for sure it is something other than aphids eating holes that big and deep, all the way through the leaf. Maybe snails or slugs? Grasshoppers? Anything like that around at this time of year?
The spiders could be feeding on the aphids?
Name: Sabrina
Italy, Brescia (Zone 8b)
Love daylilies and making candles!
Daylilies Cat Lover Region: Europe Garden Photography Garden Ideas: Level 1
Image
cybersix
Dec 16, 2015 10:03 AM CST
I don't see them moving, now it's getting dark so I can't see well. I hate winter.

I don't even see any type of insects, the temperature at night should be around 0°C it's not a super ice cold but there is ice on streets and cars.

If spiders eats aphids I will be very happy!!! I really don't know, I'm not a real gardener, it's my first experience with any kind of plant!
Sabrina, North Italy
My blog: http://hemerocallisblog.com
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
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sooby
Dec 16, 2015 10:18 AM CST
The white things are just the skins they shed as they grow so it doesn't mean they're dead. You could try the insecticidal soap. Soybean oil supposedly also works for aphids on daylilies - I can post the concentration to water if you wanted to try that. It's difficult to get them all with a contact spray rather than a systemic though, when they're deep down in the fans. You could try some diatomaceous earth if you can get it there, that would get any aphids that contact it, and also potentially whatever is making the holes. I suspect your winter won't be cold enough to totally get rid of the aphids so treating may reduce the numbers for a while or you can just let nature take its course and hope that the spider, and other beneficial insects, keep their numbers down so they're not much of a problem.
Name: Sabrina
Italy, Brescia (Zone 8b)
Love daylilies and making candles!
Daylilies Cat Lover Region: Europe Garden Photography Garden Ideas: Level 1
Image
cybersix
Dec 16, 2015 10:54 AM CST
Thanks! Tomorrow morning I will use the insectidal soap, I saw they are really down inside in the center of the foliage.
If you want yesp please, I will read about soybean oil and water. Sorry, what is diatomaceus earth? I'm not sure to understand. Is it a systemic?

It seems here there's a lack of beneficial insects. I saw ladybugs but only in october, there are some spiders (many are really big) but these light color spiders in the plant are new to me.
Sabrina, North Italy
My blog: http://hemerocallisblog.com
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Dec 16, 2015 11:24 AM CST
Here is the link to the research on soybean oil for aphids on daylilies:
http://botanicaloils.tennessee.edu/daylilies.pdf

Diatomaceous earth is the remains of ancient diatoms, it's a whitish powder that scratches the pests so they die. Doesn't look all that nice but if you're staying indoors away from the cold that probably doesn't matter Smiling
More info:
http://cals.arizona.edu/urbanipm/pest_press/2006/september.p...

(Edited to add better link)
[Last edited by sooby - Dec 16, 2015 11:27 AM (+)]
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Name: Sabrina
Italy, Brescia (Zone 8b)
Love daylilies and making candles!
Daylilies Cat Lover Region: Europe Garden Photography Garden Ideas: Level 1
Image
cybersix
Dec 21, 2015 4:24 PM CST
Thank you, I will buy some soy bean oil.
The insecticidal soap should have worked because I can't see them anymore, but I found many tiny black speckles.
Soybean should be less harmful for the garden.
I will also look for diatomaceous earth, I don't mind if it's not cute to see, I just hate pests!
Sabrina, North Italy
My blog: http://hemerocallisblog.com

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