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[IBC] Clues on Fumigation
"Claudio Fierro" wrote in message
... Thanks again everybody for the valuable information. Now I understand it isn't a good idea to use pesticides in a preemptive way; but, can someone explain to me why we can do it for funghi? Thanks. Claudio. And Andrew explained cogently: You don't always do it for fungi, and apart from in my job at a golf course I have never done it elsewhere. The reason it can be done is fungal attacks can be predicted. e.g. Humid weather can bring on specific fungal attacks, as can a lot of rain. Also certain plants may be prone to certain fungal attacks in your local area. I know Azaleas in my local area are very prone to petal blight, as are roses. This is due to the humidity here Still there is no harm in spraying at the very first signs of it. The main points to remember if you are going to spray fungicide preemtive a 1) Know the disease first so you use the correct chemical 2) Spray at correct time. This may be at a particular time of year, or just after constant rain or humid conditions. Again, depends on fungus, local conditions and particular plant/s. No point spraying at wrong time, as it does nothing and wastes money. 3) Try and rotate fungicides. Here in Australia (and I assume most other places) chemicals are classed into groups (A, B C etc). You may choose to spray group A for a year, then the following year, group B, then back to A the next year. Of course these letters are eg only, fungicides may be different group letters. Also the fungicide will have a different name, so be sure that between swapping groups they will attack your target. Failure to swap groups or over use of fungicides (or any chemical) can cause resitant fungus (and pests), then you may never get rid of the target and may lose the plant in worse cases. To which I add acerbically: READ THE LABEL Jim Lewis - - Tallahassee, FL - Bonsaiests are like genealogists: We know our roots! ************************************************** ****************************** ++++Sponsored, in part, by Chris Cochrane++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
#17
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[IBC] Clues on Fumigation
Claudio:
The first thing I do is turn a hose on a tree that might be infested. I use one hand to hold down the trunk and spray as close as possible under and on top of the leaves. I do this a couple times a week until I see the pests are gone. Then I put out a sign, "welcome spiders!" Seriously, I have spiders, and to me they are the friends of Bonsaist! Best of luck, Carl L. Rosner - near Atlantic City zone 6/7 http://rosner.becanz.net http://www.jamesbaird.com/cgi-bin/Ja...d=00000068 48 --- Claudio Fierro wrote: Thank you all a lot for the feedback on that issue. I have lost lotīs of trees because of pests and donīt know exactly what the right response to that problem is. ************************************************** ****************************** ++++Sponsored, in part, by Chris Cochrane++++ ************************************************** ****************************** -- The IBC HOME PAGE & FAQ: http://www.internetbonsaiclub.org/ -- +++++ Questions? Help? e-mail +++++ |
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