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Beginner Flowers: dahlias

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Forum: Beginner FlowersReplies: 4, Views: 65
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keanl
Orland Park, IL
(Zone 5b)

July 13, 2012
3:04 PM

Post #9204173

My dahlias are losing leaves and seem to be falling apart. I noticed some small spider webs on leaves and reddish dust on the leaves??

Thanks
ecrane3
Dublin, CA
(Zone 9a)

July 13, 2012
4:52 PM

Post #9204311

Is the reddish dust on the underside of the leaves? If so it could be spider mites. Otherwise some pictures would be helpful to figure out what's going on. The way I treat spider mites is to blast the undersides of the leaves with the hose to wash off as many as possible, then I repeat that every couple days for a while until I'm sure they're under control. You can also use an insecticide, but it's critical to hit the undersides of the leaves since that's where they live.
keanl
Orland Park, IL
(Zone 5b)

July 13, 2012
7:50 PM

Post #9204457

Here are 2 pictures of my dahlia problem. Thanks

Thumbnail by keanl   Thumbnail by keanl
Click an image for an enlarged view.

flowAjen

flowAjen
central, NJ
(Zone 6b)

July 16, 2012
9:43 AM

Post #9207188

Yes looks like spider mite damage
keanl
Orland Park, IL
(Zone 5b)

July 17, 2012
3:12 PM

Post #9209255

Thank you

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