
Organic Gardening Tips
Excerpt from the January 2011 IOGA Newsletter By Janet Glover
Tomato Blight

This year, I read about Plant Guardian, which is a bio fungicide...Bacillus
Subtillis...that attacks harmful bacterial and fungal garden diseases. So I
began using Plant Guardian, along
with Soap Shield and Neem oil, as
soon as we planted tomatoes because I was concerned about a repeat of the
awful blight we had in 2009. I do believe that the Plant Guardian is what has made the difference since it's the one
thing that's different than what I did in 2009. As I said...the Soap Shield and Neem oil together didn't
stop the blight in 2009, but this year, our tomatoes have been very green and
healthy, with no blight. Recently, three of the plum tomatoes were hit with
something that appears to be fungal, but it hasn't really spread to the other
plum tomato plants in that bed. We did take out two of the plum tomato plants because they were nearly dead, but the other plants are growing and producing
very well.
So...I'm not sure exactly what
did hit those three plants. It seems to have been a matter of them wilting overnight in the heat and then not
recovering...and perhaps that weakened them and made them more susceptible to
disease. I did use Plant Guardian on
them right away, and one has recovered fairly well...and the other two were
taken out yesterday. The rest of the plants have a few yellowed lower leaves on
them, but nothing serious. We will
remove the leaves and continue with Plant
Guardian and Soap Shield and Neem
oil. I would like to have a test plant somewhere
separate from the other tomatoes so that I could use only the Plant Guardian on it...just to see if it
would do as well or even better than the plants sprayed with Soap Shield and Neem oil. And I plan to
do that next year. In any case, I think I can say that the Plant Guardian has made a BIG difference this year. Our second bed
of tomatoes has done very well and does not show any signs of blight.
We planted five tomato varieties, Sweet
Olive, Early Girl, Better Bush, Better Boy, and Mountain Spring, all
purchased
from Whole Foods. Oh...and we also
have one bed of only Roma plum
tomatoes. We do love heirloom tomatoes, but they seemed to have less resistance
to blight, and so we began trying varieties that are VFN resistant, and that
seems to have helped. Next year, I want to try heirlooms again, to see if Plant Guardian will make a difference
with them. I would like to use no sprays at all...not even the safer organic
ones...but with tomatoes, it seems that there is no way to get around it.
Blight quickly takes over if we leave them untreated. But I think Plant Guardian is safer...so hopefully
my experiment next year will show me if I could raise tomatoes using only Plant Guardian. I'll let you know how
that comes out! With gardening, I think our motto is always "Next year..."
Potatoe Blight

seed potatoes, even if they are
certified virus-free. Though it didn't make sense that the seed potatoes had
been infected, because only one bed started turning yellow. And no potatoes or
tomatoes (or peppers or eggplant) had been planted in that bed before. so it was
really
a mystery as to why the yellowing began. And I may be mistaken about verticillium though that is the
only answer I could come up
with. Perhaps it was actually blight, and I just didn't realize it. I began
using Soap Shield, Plant Guardian, and Neem oil on that bed
and on the other two beds of potatoes. I do believe that it was the Plant
Guardian that made the difference.
Soap Shield and Neem oil together did not really stop blight on our
potatoes in 2009 but when I used Plant Guardian, I did see the potato plants
make a partial recovery. They would begin growing again, and the new
growth was green. They would really "perk up" after an application of
Plant Guardian...much more than with
the Soap Shield and Neem oil. And I
do think Plant Guardian gave the
other beds of potatoes some protection so that they were able to stay healthy
several weeks longer...though eventually, all three beds did succumb to whatever
this is...blight or verticillium.
Truly, it looks like blight
now...though I cannot be 100% sure of that. I do think from all that I have
seen that Plant Guardian has given
the most protection and has helped most when the potatoes were diseased.
Again, I think I will plant a
test potato bed somewhere next year using only Plant Guardian...to see how it does. I really do feel better about using
Plant Guardian than using Soap Shield, even though Soap Shield is a safe product. So I am
going to experiment and see what I find out!
Oh...for those who may not
know...Plant Guardian is safe to use
right up to the day of harvest, and it can be used at any time of day--in heat
or high temps--and will not burn or damage plants in any way.
Squash Bug
While the Pyola does kill the live squash bugs, I have also found more of
them later...so I think the eggs did hatch out. We do go through the bed and
remove all leaves that have eggs on them...and those leaves are destroyed. But
I have found that squash bugs are so persistent that I have to keep a very
close watch on them. I try to use the Pyola
very carefully...even though it's a safe botanical remedy...because it will
kill beneficial insects, too. So I spray judiciously...only on the exact area
where I know there are squash bugs.
We didn't have too many Japanese
beetles this year, though they did attack the basil, as they always do. With
that, I just use tulle from the fabric store to cover the basil so that the
beetles can't get to it. It works perfectly, and no Pyola is needed. We want to make floating row covers for more of
our crops...such as squash and cucumbers...to hopefully keep squash bugs and
cucumber beetles out. Even though Pyola is
safe...I still would rather not use it unless absolutely necessary. If we can
cover the plants to keep bugs away, then we'll definitely do it. That is
something we'll work on a lot more next year.
Powdery Mildew
Our basic thought on sprays is
to use them only when really needed...and then very carefully and judiciously.
And we are trying to go without them whenever possible. We don't mind living
with a small amount of insect damage, as long as it doesn't destroy the plants.
The BIGGEST problem by far is a fungal disease...and that is mostly the problems
with tomatoes and potatoes...blight, verticillium, etc. For that, it seems that
spraying is a necessity...but we use only safe sprays from Gardens Alive...and
I really prefer the Plant Guardian...and
I think it has given the most help and most protection.
Tomato Hornworms
& Cabbage Loopers
Oh...we do use Bt as
well...Bacillus thuringienses...to keep tomato hornworms and cabbage loopers
out. But we use that very carefully, as well, because it will kill butterfly
caterpillars too. And I have read that there is a concern that butterfly
numbers are declining in areas where there is overuse of Bt. So I am very
careful to use it sparingly...and only directly on the plants where
caterpillars are a problem. Really, it seems that I need to use it only once or
twice, and that takes care of it.
We don't have any problem with
tomato hornworms, and we did have them in the years before I used Bt. But a
little of it does seem to do the trick insects, not leaves.