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Charlie
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« Reply #15 on: August 13, 2009, 05:42:32 PM » |
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Those leaves are typical spider mite leaves. How about the underside - what do you see?
Charlie
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helixturnhelix
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« Reply #16 on: August 14, 2009, 08:38:08 AM » |
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this is why u want the edit option  |
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Nievesgirl
Posts: 975
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« Reply #17 on: August 14, 2009, 08:52:15 AM » |
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this is why u want the edit option LOL exactly stupid photobucket was not copying the img code ! |
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~Kerry~
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Charlie
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« Reply #18 on: August 14, 2009, 09:02:14 AM » |
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Great close-ups, Kerry!
What you see is the battlefield after the battle. Mites are gone but their detritus and damage is left behind. Mite damage often is observed showing up several days after the mites have been killed off. I don't know why this is but I have noticed it often enough. It is worrisome because you can't help but think the damage is new and that the spray failed to do the job but then a closer check shows that there are no more mites present.
In this case I am only commenting about the leaf parts that are in sharp focus in the photos, but assume that you looked closely all over the leaf and it all looks the same, with no little crabs scampering about. If that is the case then you did kill off the mites and this damage occurred before your last treatment.
As always with most pests on hibiscus, the surest way to be rid of them for an extended time is to treat the hibiscus twice a week for 2 weeks and if in doubt add a 5th treatment midway through the 3rd week. That breaks the life cycle and makes sure all young from existing eggs are eliminated and none mature to egg laying age. Then, if no new ones are introduced to the group the problem is solved. Thus, the suggestion to quarantine or even treat all new plants that are brought in.
Charlie
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Nievesgirl
Posts: 975
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« Reply #19 on: August 14, 2009, 09:10:38 AM » |
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I will double check all of the leaves and make sure I do not see any. If I don't see any would you think it would be ok to spray spinosad or hort oil ? The rest of the plants that are next to it have 0 yellow leaves and are doing fine.
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~Kerry~
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Charlie
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« Reply #20 on: August 14, 2009, 09:18:25 AM » |
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It's always ok and often a good idea to spray preventively rather than waiting for problems - particularly when using hort oil or other non-chemical type sprays. Only you want to avoid having the sun hit the oil, as you know. Spinosad is only useful against thrips and some other insects that are not a problem for hibiscus such as the Med Fruit Fly. You remember when they find the Medit. Fruit Fly here in California they announce that aerial spraying is being done to eliminate it? It's spinosad that they usually drop from the planes onto everything below. People freak out about it, understandably, but spinosad is the mildest effective spray around and probably does no harm other than to the fruit flies and thrips which is similar to flies anyway.
Charlie
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Darkhorse
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« Reply #21 on: August 15, 2009, 11:04:03 PM » |
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Hey Charlie, Delayed reaction again, but I went out to look for leaves with yellow veins only and don't have any at the moment. Mostly, this prob is occurring on my Silver Memories. It gets the same HVH fert, booster, and Supernova that the others get, so I don't think it's a problem with nutes. Most of my yellow leaves on all my plants look just like Kerry's, so I know I have spider mites going on... ugh... I just looked back to some photos from a couple of months ago and my 5th Dimension and Silver Memories look like crap now!! I've dunked all my 4" plants along with my Swamp Music, Gator Pride, and Cinnamon Girl. My little High Voltage and the other three were all showing signs of mites. They're all now quarantined inside my house. I'm glad you mentioned that mite damage can show up a couple of days later, because my High Voltage and Gator Pride both got dunked yest. morning and I came home from work tonight to more "spider-mite-yellow" leaves! Had I not read your post I would have freaked. I will let you know more updates. The washed Island Girl that I brought in first is still separated on top of my entertainment center and looks perfectly clean. No yellow leaves or dropped buds from the treatment!! My bathtub, on the other hand, does NOT look perfectly clean now (not that it ever does!!)..hehe More to come later on the drama of these !#$^@#^ spider mites!!! Jordan |
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"They who dream by day are cognizant of many things which escape those who dream only by night." -Edgar Allan Poe
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Nievesgirl
Posts: 975
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« Reply #22 on: August 24, 2009, 09:12:29 AM » |
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I been spraying and spray and I still have leaves coming of of cinnamon girl ! should the damage continue on this long ? I guess I will do the tub treatment tonight sigh !
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~Kerry~
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Laura
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« Reply #23 on: August 25, 2009, 03:53:46 PM » |
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Ah... so today i just found out i have spider mites on my hibiscus  I dunked it in the sink for 30 minutes, but i still saw a spider mite walking across the soil. Should i have left it in the water for a longer time? |
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Darkhorse
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« Reply #24 on: August 25, 2009, 09:11:39 PM » |
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Well it's been almost a week since I did my Chariots of Fire and it is still showing new yellow leaves. I keep plucking them off... grr!! Laura, it sounds like you may not have spider mites... are you sure that's what it is? I can't see them at all with my eye alone and I have 20/20 vision. If you can see one walking across the soil you must be superhuman!!  |
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"They who dream by day are cognizant of many things which escape those who dream only by night." -Edgar Allan Poe
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Laura
Posts: 16
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« Reply #25 on: August 25, 2009, 10:19:26 PM » |
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Lol! wish i was superhuman. I have to admit they were not easy to see. At first glance I didn't see anything but i as I watched, i saw them scurry across the leaf. I'm pretty sure thats what they were since my leaf was turning yellow. Anyways, I soaked the plant longer with warmer water and now i don't see any more. Hopefully this killed whatever it was.
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Charlie
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« Reply #26 on: August 26, 2009, 04:48:19 AM » |
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Hi Guys,
Cindy says that when she dunks the plants long enough to take care of the mites the plants will still have some leaves turn yellow for up to 3 weeks. Also, its useful to keep in mind that hibiscus leaves do not last a full year. The plants change their leaves normally twice a year, not all at once but gradually one or two at a time. Some of the yellow leaves that we see are natural, and can be removed without concern that they are the result of mites. Having a magnifier handy to check out the underside of any yellow leaf for mites is also good for peace of mind and as a guide for figuring out if treatment is needed or not.
Charlie
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Darkhorse
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« Reply #27 on: August 26, 2009, 11:15:11 AM » |
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Oh good, 3 weeks is longer than what I would have thought. I've been obsessed with killing these things since the infestation got worse and worse... I think I have several casualties, unfortunately. Time will tell. Laura, The water bath should have gotten everything. Maybe it's a good thing that I'm not seeing spider mites at this point. lol |
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"They who dream by day are cognizant of many things which escape those who dream only by night." -Edgar Allan Poe
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Nievesgirl
Posts: 975
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« Reply #28 on: August 26, 2009, 11:57:40 AM » |
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 @ 3 weeks no wonder why my cinnamon girl looks so bad. I have not seen any spider mite just yellow leaves. I gave a bath to all of my hibiscus except two. So this should have killed them all.
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~Kerry~
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Laura
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« Reply #29 on: June 29, 2010, 11:55:49 PM » |
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Has anyone heard of or used diatomaceous earth as an insecticide? It supposedly kills pests like aphids, spidermites, and thrips.
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