Black Spots on Leaves. Cannot identify.

[bower]

Okay I found something that may help to explain Carolyn's cryptic remarks.
Oil sprays are used to reduce the transmission of virus/viroid diseases by aphids. These sprays lose their efficacy when combined with chlorothalonil, according to:
https://books.google.ca/books?id=8o7...viroid&f=false
Whew...

[carolyn137]

Originally Posted by bower

Okay I found something that may help to explain Carolyn's cryptic remarks.
Oil sprays are used to reduce the transmission of virus/viroid diseases by aphids. These sprays lose their efficacy when combined with chlorothalonil, according to:
https://books.google.ca/books?id=8o7...viroid&f=false
Whew...

I don't think any of you know how many links I had and I couldn't list all of them,but here
is another one I didn't link to

https://www.cabi.org/isc/datasheet/43659

Look at transmission and you'll find aphids,but not the same explanation that your link gave.

Me cryptic? Never.

Carolyn

[carolyn137]

Originally Posted by ddsack

Although there is a lot of information about PST viroids in the links you provided above, I didn't see anything that mentioned use of Daconil as increasing likelihood of viroid attack. I scanned a few of the most promising sounding papers, not the whole list.


I understand that Daconil cannot prevent viroid attack, but that in itself seems an odd reason to ban it, since that's not the use it is advertised for.

Dee, it seems that I've failed somewhere here.

Maybe it would be best for someone to start a new thread just about Chlorothalinol.

When Tville first started I think I remember there was a Forum for growing organically,or maybe that was at the original Garden Web,now Houzz.

In any case such Forums never last long b/c of all the infighting.

But there is someone here at Tville who was once at idig, and that person might know what I'm talking about b/c that person was about the only sane one at idig in what was called the POF(Politics of Food) since many of the threads were about what was used on crops as to pesticides,and yes Daconil as well, that led to contamination of vegetables sold in a store,or stone crops, etc.,and so much more.

Carolyn, who doesn't think there is anything more she can contribute to the discussion, or can she? Other than making this suggestion above;(Maybe it would be best for someone to start a new thread just about Chlorothalinol).

[Johnniemar]

What am i missing here??? I thought they said they were baning it because of a threat to HUMAN health. What does a potato disease have to do with anything.

[Johnniemar]

I use daconil quite a bit, but i always wear a respirator, safety glasses, long pants and long sleeve shirt and hat and waterproof glives.

[gorbelly]

I use copper at the full recommended strength, and I've never had problems with blossoms. I actually get very good fruit set in my garden. No complaints there.

EDITED TO ADD: Also, I don't avoid flowers when I spray. It would be super difficult to do so. The flowers get the same amount of spray as everything else. Still no problems.