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Old 06-25-2009, 05:31 PM   #16
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Spider mites!!! How often can I use Malathion?


Quote:
We've had lots of rain here in Cincinnati during the springtime (every day or every other day for about 3 weeks), so I was guessing that these junipers just had too much rain.
Spider mites are a problem in hot, dry weather, i.e. July and August.

Possibly, the extra rain could have caused root rot, especially if you have poor drainage. Looks a lot like something that hasn't been watered. The problem here though is that the plant can't take up the water, which in the end still equals no water to the plant above ground. Just a guess.

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Old 06-25-2009, 05:40 PM   #17
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Spider mites!!! How often can I use Malathion?


Yes, I heard that if these junipers were planted in such a way that the rain water just sat pooled at the base, then that would be a problem. Another issue is that they were planted in clay---not soil. Although these plants were underneath the soffits and didn't get the full drench of rain, they initially had that dip at the center. I've added soil and built up the base so water would drain away instead of sitting in the middle. So I'm not sure what is bringing them back to life---the 2 applications of Malathion, or the adding of soil to the very center of the base. They don't look the best, but at least there's a touch of green on the tips now.
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Old 06-26-2009, 03:58 PM   #18
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Spider mites!!! How often can I use Malathion?


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Although these plants were underneath the soffits and didn't get the full drench of rain, they initially had that dip at the center.
Two years ago I dug up a gardenia and gave it to a neighbor. It struggled a little the first year but was holding its own. With all the rain we had this past spring, it and a rose bush died. They were about 6-8 feet from the corner of the house and she tells me that it stayed pretty wet there for several weeks.

Anything is possible with pests, but I REALLY DOUBT that you had spider mites a couple of months ago. Please search for further spider mite info. You could have had some other pest in there, or it could have been a water issue.

My apology in advance for maybe sounding condescending, but please don't go about just spraying wholesale unless you are really sure what the pest is. If you don't know this, bugs (and diseases) can adapt and become immune to treatments applied improperly. This is why new products are being continually developed and why rotating treatments is often recommended.
PS- Have you read the label on the Malathion for spider mite treatment?

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Old 06-26-2009, 06:05 PM   #19
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Spider mites!!! How often can I use Malathion?


PS- Have you read the label on the Malathion for spider mite treatment?

Yes, I read the label over and over. That was the reason for my post last year. All it said as far as directions was "use as needed." And never having used it before, I had no idea what they were talking about---daily, weekly, monthly, what? I just wanted to try anything to save these expensive decorative plants from dying. At $80 a pop (and having a lot of these planted around the house), I hated to see them dying and not trying anything.

So although it sounds like it was not spider mites after all (since they were dying during a very wet spring season), I think changing the base from a pooling/puddling base to a drain-off base, I think that's what is bringing them back to life.
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Old 06-27-2009, 02:33 PM   #20
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Spider mites!!! How often can I use Malathion?


I looked on my bottle of malathion but the label pages are stuck together.

Went to this site:
http://www.pbigordon.com/pdfs/Malathion50Spray-SL.pdf

found this info for flowers, ornamentals, and shrubs:
"Apply in summertime when infestation occurs. Repeat in 10 to 12 days."

Most of the sections do say to apply as needed, but I have found that you have to be careful and look at the information in the specific box that you need. Sometimes they will have different instructions for different crops.

For example, if I have a problem with aphids I spray and then watch for a good kill over the next couple of days. I may repeat in 4 or 5 days. But they are soft bodied and if the application was accurate, it will be readily effective.

Sometimes I get a little long-winded and in trying to be concise I leave things out. A couple of other points:

Although Malathion is labeled for use on spider mites, it is an insecticide. Mites are arachnoids (spider family). It is generally preferred to use a "miticide" for spider mites. A good first try is a very hard hosing. Seriously. Not like you are watering for irrigation, but like using a water canon on rioters. They won't like it, get mad, and leave.

There are several fungi that attack junipers. One is called "juniper twig blight" for instance. These usually occur during extended rainy weather or from improper watering. More specifically, the problem comes from the foliage staying too wet. The solution generally is to cut out the affected parts and make sure that the good foliage stays as dry as possible. Proper spacing at planting is important.

There I go getting verbose again. But I understand your investment, and I hope you understand that I am trying to help cover most of the bases.
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Old 06-27-2009, 03:25 PM   #21
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Spider mites!!! How often can I use Malathion?


I used malathion on some ti plants here, and it melted (best description) the leaves.
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Old 06-27-2009, 04:58 PM   #22
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Spider mites!!! How often can I use Malathion?


"There are several fungi that attack junipers. One is called "juniper twig blight" for instance. These usually occur during extended rainy weather or from improper watering. More specifically, the problem comes from the foliage staying too wet. The solution generally is to cut out the affected parts and make sure that the good foliage stays as dry as possible."

This might be the issue! Here's 2 pictures of what's happening with my juniper bushes:

Never mind. When I click on the icon above for "insert image," it just gives a "whoop" sound for me. I've got to figure it out first and then post it.
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Old 06-27-2009, 05:08 PM   #23
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Spider mites!!! How often can I use Malathion?


Here's what they look like. They're brown on the inside, but if I shake the plant, it will be bare on the inside. At least the tips are coming back to life on some of them.
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Spider mites!!!  How often can I use Malathion?-juniper0.jpg   Spider mites!!!  How often can I use Malathion?-juniper2.jpg  
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Old 06-29-2009, 06:36 PM   #24
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Spider mites!!! How often can I use Malathion?


Just for reading
http://www.oznet.ksu.edu/dp_hfrr/ext...s/cercospa.htm

http://plantclinic.cornell.edu/FactS...ht/juniper.htm

Several types of juniper blight.
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Old 11-15-2009, 06:44 AM   #25
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Spider mites!!! How often can I use Malathion?


'proofer' - Browning is a common problem. Chances are your junipers are not doing well primarily because they were transplanted in mid-summer, most appropriate time is fall or early winter, as suggested by 'downunder'. My first recommendation would be to prune off the dead tops, secondly avoid 'overhead' watering, thirdly spray with a mixture of 2 Tbsp. of liquid dish soap in 1 gal. of water (good call 'agrace'!) rather than chemicals to rid tree of ANY bugs or fungus. Where & when did you transplant hostas that aren't doing too well? They flourish best in shade or partial shade.
'downunder' - Forgive me if I'm wrong, but your azaleas appear to be planted in full sun; they prefer to be in partial to full shade. If in full sun, they can be attacked by lace bugs (causes gray splotches), which is a good possibility why you lost the first one. If this is the case, use same environment friendly soap mixture described above. Otherwise transplant them to a shady location & if that's not possible, try staggering something taller between them to give them more shade. Also - nice tip on spider mites (paper trick; we must have the same book!); giving them a spray/blast 3 days in a row will also encourage natural predators. Another remedy for spider mites: buttermilk spray - combine 1/2 cup buttermilk, 3 1/2 cups wheat flour and 5 gallons water & apply to undersides of leaves or directly on infested branches of shrub/tree.
Oh, & I'd be pruning that dead stuff off your trees, looks nasty.
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Old 11-15-2009, 10:40 AM   #26
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Spider mites!!! How often can I use Malathion?


Quote:
'downunder' - Forgive me if I'm wrong, but your azaleas appear to be planted in full sun; they prefer to be in partial to full shade. If in full sun, they can be attacked by lace bugs (causes gray splotches), which is a good possibility why you lost the first one.
Lali- You are forgiven.

Point 1.
Siting and planting:
Those azaleas are indeed planted in full sun. One of twenty died because:
A: They were rootbound at the nursery too long.
B: They were not watered properly (because they were inside a locked fence- thanks to Homeland Security- at the local water department.

Point 2.
Lacebugs:
Absolutely not. Could you cite your source for the "full sun" and "gray splotches" signs? That has not been my experience. Lacebug damage is very similar to that of spider mites, i.e. the foliage is very yellowed and dark-speckled . My "speckled" looks like overspray from a paint gun. If one turns the leave over, there will be specks of feces from the lacebugs. Not so with spider mites. There is also the timing of the damage. Spider mites are in the heat of the summer. Lacebugs are more cyclical in temperate weather, i.e. April, May, and maybe June. And for what it's worth, ALL of the lacebug damage I have had has been in the part shade conditions that azaleas prefer, in amended soil, and well- watered.

My opinion is from being a Certified Landscape Professional and Commercial Pesticide Applicator (having gardened for fifty years) under the supervision of someone with a BS from UGA and thirty years professional experience combined with the resources of the University of Georgia Cooperative Exension Service.
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Old 11-16-2009, 05:41 AM   #27
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Spider mites!!! How often can I use Malathion?


Posted a lengthy reply 'downunder', but has yet to appear. Contacted DIY. If it doesn't show up later, I'll redo it minana!
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Old 11-18-2009, 06:45 AM   #28
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Just wasted another hour responding to 'downunder' & it does not display!!! And yes, I was logged in! Will let diy know again! And will try again tomorrow!
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Old 11-19-2009, 04:45 AM   #29
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I am ready to scream!!! My reply keeps disappearing! If at first you don't succeed; try & try again!!!!!!! Will do it again tomorrow!
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Old 11-20-2009, 03:40 AM   #30
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Spider mites!!! How often can I use Malathion?


Thanx for the forgiveness. Once more, with feeling!

Quote:
Those azaleas are indeed planted in full sun.
Source #1 - Gardening Secrets, Reader's Digest states: "Grow azaleas and rhododendrons near large shade trees or mix them with other shrubs in foundation plantings."

Source #2 - Complete Home Gardening, Margot Schubert states: "It is advisable to be rather careful where you plant azaleas. They do not like a lot of bright sunshine on their bare branches towards the end of winter and they suffer in exposed, windy situations."

Quote:
Could you cite your source for the "full sun" and "gray splotches" signs?
Know you only asked for this source, just figured I'd give you the others.

Source #3 - Gardening Made Easy, International Masters Publishers states: "Azaleas prefer to be out of full sun. In hot summer areas, plant in the shade, under trees or in a shady border, to avoid scorching." Also: "Azaleas growing in full sun may be attacked by lace bugs. These 1/8 in. long pests suck the sap from the shrubs' foliage, causing gray splotches to appear. At first sign of damage, spray tops and bottoms of leaves with insecticidal soap."

Even though your azalea was lost due to the possibility of being root bound or lack of sufficient watering, I would still suggest moving your babies or planting something in between them that will provide them with some shade.

Quote:
My opinion is from being a Certified Landscape Professional and Commercial Pesticide Applicator (having gardened for fifty years) under the supervision of someone with a BS from UGA and thirty years professional experience combined with the resources of the University of Georgia Cooperative Exension Service.
My opinion comes from being a gardener for fifty years, as well, (since I was knee-high to a grasshopper!) under the strict supervision of four gruelling grandparents & two persnickety parents, (which I'm certain can equate to one person with a BS). Not to undermine your success, position or capability; I have seen evidence of this in several of your posts. BTW - you're a riot! I, too, hold a degree, just not in horticulture.
The majority of my 'work' has been voluntary; helping family, friends & neighbors designing, creating, digging, planting & tending gardens. Among a few of my thousands of 'clients': The Salvation Army & several churches. I am but a mere & humble servant of the Lord with an extreme passion for 'earth' & a sincere desire to lend assistance to whomever crosses my path with whatever experience, knowledge & wisdom that I possess. After all, isn't that what we're all here for? To live, learn & share.

Please, take no offense & no hard feelings! God Bless y'all.


Last edited by Lali; 11-20-2009 at 03:47 AM. Reason: spelling
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