Verticillium Wilt
Deb 215 SEWI5
8 years ago
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jean001a
8 years agoDeb 215 SEWI5
8 years agoRelated Discussions
Verticillium wilt in Japanese maple?
Comments (1)IME, when VW hits a Japanese maple this young, the result is fatal and fast. Like virtually overnight (2 or 3 days) to a week at most. It certainly won't hurt to leave as-is in place over winter and see what happens in spring. Any deadwood can be removed at that time (sterilize pruners between ALL cuts) or the tree could be completely gone or completely fine. I am inclined to think NOT VW because of the only partial wilting/dieback (usually see that on much more mature, established trees) and the lateness of the season. But symptoms are not alway consistent so it is still a possibility. btw, this forum gets very little traffic. You might want to post any updates or further JM queries on the Maples forum....See MoreAmerican persimmons and verticillium wilt
Comments (6)I would not be overly concerned - as long as you did not plant these in the exact location of the previous raspberries or maples. The verticillium pathogen is present in most soils but most often in a dormant or inactive form. It is an opportunistic pathogen in that it will become active when susceptible species are stressed (weather extremes, drought, other disease or pest issues, etc.) or experience root disturbance, like from planting or transplanting. That is why it is recommended you do not replant a susceptible species in the same location as a previous plant that has succumbed to VW. But that doesn't necessarily mean you can't plant anything in your garden that may be susceptible. It is entirely possible to have a maple tree become infected with VW in one area while a nearby maple is VW-free. There is nothing you can do to control the pathogen or prevent infection other than avoiding the previous actively infected site and taking care any new plantings are kept stress- and root damage-free. Or planting resistant species :-) Verticillium Wilt...See MoreDoes this look like peony verticillium wilt?
Comments (6)Thank you, everyone. Alex - I think you are right and it's time to start mulching around the plant - I used a moisture meter at noon today and the soil around the poor plant was pretty much bone-dry. I am totally a newbie to this, so had NO idea that the soil could dry so fast (it was literally watered yesterday!). Maifleur - thanks for your clarification. I'll mulch, but will avoid the crown. I'll update everyone in a few weeks to see if these guy get better. :)...See MoreYoung bigtooth maple dying- verticillium wilt?
Comments (2)It does look suspiciously like verticillium. That is the only common plant pathogen that will cause almost overnight wilting and decline. However, a confirmed diagnosis can only be done in a plant pathology lab. Best to take these samples into your extension office to confirm (or not) to avoid replanting with a susceptible species. btw, VW would not have come with the tree. It is an opportunistic soil pathogen that is present in virtually all soils but remains inactive or dormant until stimulated into activity by various signals (like root hormones) from damaged or stressed trees. Poor drainage (as well as drought) is a major causal factor....See Moregardengal48 (PNW Z8/9)
8 years agoDeb 215 SEWI5
8 years agoDeb 215 SEWI5
8 years ago
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gardengal48 (PNW Z8/9)