From: Anthony (boofq@wn.com.au)
Date: Thu Apr 17 2003 - 21:39:12 EDT
mike,
ive only been applying CT for for the last 4 months, i missed bud burst so =
i am gearing up for next season. Havent done any brix anaysis post ct but w=
ill do. Does it matter where you measure from - i.e. petiole vs leaf. suppo=
se it wouldnt hurt to both?
anthony
----- Original Message -----
From: Mike Harvey
To: compost_tea@yahoogroups.com
Sent: Thursday, April 17, 2003 10:13 PM
Subject: Re: [compost_tea] CT effect on wine
Anthony,
We have very little problem with mites, there are predatory mites that wi=
ll control the bud mites etc. Interesting to note that using CT in preferan=
ce to sulphur will tend to encourage predatory mite populations as the sulp=
hur will kill most of these organisms (the exception is Typhlodromus doreen=
ae).
The predatory mite Amblyseius victoria is susceptible to sulphur sprays.
Lace wings and lady birds also predate mites so eliminating pesticides wi=
ll encourage natural control of these organisms. As you would know as you g=
et plant sap brix to a true brix of 12 or above and pH nearer 6.4 pests suc=
h as these become negligible.
Interesting to note that the folia analysis for the CT treated vines show=
ed good levels of Ca and we were able to use folia sprays (phos acid and hu=
mics) that raised brix by up to 2 degrees. It may be that the CT was helpin=
g to improve Ca levels and thus folia sprays were more effective?? No data =
to prove or disprove just a theory at the moment.
Glad to hear you are monitoring using Reams approach have you been able t=
o measure brix improvements using CT? I have measured small movements upwar=
ds using CT in other crops but have not measured it in grapes after using C=
T?
Once mineral balance occurs in the vines everything becomes easy and y=
es it will affect CT performance. However you can have all the right minera=
ls in the soil in the right ratio and balance etc but if the biology is out=
of balance (bacterial to fungal etc) then it will not work. So we need bot=
h soil chemistry and biology (and physics) to be functioning as they were d=
esigned to in the soil.
Regards Mike Harvey
www.composttea.com.au
----- Original Message -----
From: Anthony
To: compost_tea@yahoogroups.com
Sent: Thursday, April 17, 2003 9:20 AM
Subject: Re: [compost_tea] CT effect on wine
Thanks Mike
i think mineral balance in the soil has alot to do with the efficacy of=
CT on foliar disease suppression. I have achieved some good Rheams numbers=
in my vineyard and results speak for themselves.
what about mites?. Do you think early inoculation with CT in the vineya=
rd can out compete rust mite on the leaf surface. pathogens such as the pow=
derys' and botrytis are in the order of a few micrometers, surely these mit=
es must be in the order of a few hundred micrometers (or more). i cant see =
any of the suite of microbes munching down on a mite, so is it competition =
for space in this situation as opposed to eating each other. rather analogo=
us to a david and goliath scenario dont you think?
Yahoo! Groups Sponsor
To unsubscribe from this group, send an email to:
compost_tea-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
Yahoo! Groups Sponsor
ADVERTISEMENT
To unsubscribe from this group, send an email to:
compost_tea-unsubscribe@yahoogroups.com
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
This archive was generated by hypermail 2.1.5 : Wed Apr 23 2003 - 16:57:49 EDT