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Re: Southern blight in Delaware AGAIN, cocktail time!

A very thorough discussion of the southern blight problem. I will check
everbody carefully this morning on my walk-around since we also had heavy
rains last week followed by 95 deg temps this week.

Do you mind if I forward this to a friend at the GardenWeb Hosta Forum that
is having the problems identifying SB?


At 12:43 PM 7/5/99 -0400, you wrote:
>I have maybe 20 hostas showing signs of southern blight. On some only a
>few leaves have laid flat on the ground. One four division H. 'Hirao
>Majesty' has lost all thirty of it's leaves leaving only the three ready
>to open bloom scapes standing tall and healthy looking.
>I have 12 t.c. liners of H. 'Sagae' that are in their second year and
>one of them has lost all of it's leaves to southern blight.
>Last year I had approximately 15 hostas loose all of their leaves to
>southern blight. All 15 were treated with a Terraclor drench and they
>all look fine this year, so far. In my micro-environment if a hosta
>looses all of it's leaves one year, the following year there is a 1/3
>reduction in size.
>Sunday about 2 hours before dark I served my hostas the following
>200 gallons well water
>5 lbs. MircleGrow
>I lb. Epsom Salt
>2 lb. Benlate SP
>Applied until heavy leaf run off and light drenching of soil around
>crown giving special attention to hostas showing signs of disease.
>Fungicides are best used as a preventative. I waited this year until I
>started to see some southern blight damage before treating all of our
>Benlate with a Turf and Ornamental label is hard to find. Benlate was
>taken off of the T and O market because of lawsuits arising from a
>factory mix-up that resulted in herbicide contaminated Benlate. Benlate
>is still in use in commercial agriculture. It's a shame it lost it's T
>and O label.
>Your local garden center has fungicides that will control  Sclerotium
>rolfsii(southern blight)  AKA southern stem/root rot, or white mold.
>Other plants affected are tomatoes, peppers, potatoes, peanuts, lawns
>and beans.
>Southern blight is easily spread around the garden by the moving of
>infected plant leaves and crowns. The fruiting bodies (sclerotia) look
>like small granules of fertilizer where the hosta leaf stem contacts the
>ground. Leaves may still look fairly good but will detach when pulled
>lightly. Have a container handy to collect diseased leaves or you will
>become your own worst enemy.
>I spent several hours on the web last year looking into southern blight.
>The most informative sites were the local USDA extension offices and
>centered on commercial agriculture.
>An interesting note: I read that sclerotium rolfsii spores will
>germanate after 3 days at 95F and first rainfall or irrigation. This is
>now in my area.
>I would like to hear from people who have successfully controlled
>southern blight in their hosta garden.
>Dan Nelson
>Bridgeville DE.
>Zone 7 and 100 degrees F. today.
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