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#1
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Blotches on sunflower leaves
My sunflower has developed brown blotches surrounded by black borders. What
is this? Is it detrimental to the health of my sunflower? How do I treat it? Thanks, Adam |
#2
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Blotches on sunflower leaves
Actually, that's brown blotches with bright yellow borders. I don't know
why I said black... "Adam Schwartz" wrote in message news:04IOa.11456$N7.1689@sccrnsc03... My sunflower has developed brown blotches surrounded by black borders. What is this? Is it detrimental to the health of my sunflower? How do I treat it? Thanks, Adam |
#3
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Blotches on sunflower leaves
"Adam Schwartz" wrote in message news:04IOa.11456$N7.1689@sccrnsc03...
My sunflower has developed brown blotches surrounded by black borders. What is this? Is it detrimental to the health of my sunflower? How do I treat it? Thanks, Adam What shape are the blotches What has the weather been What fertilizers have been applied What is your watering practice Do the blotches cross leaf veins Treatment is unlikely, prevention might be possible. |
#4
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Blotches on sunflower leaves
"Beecrofter" wrote in message
m... "Adam Schwartz" wrote in message news:04IOa.11456$N7.1689@sccrnsc03... My sunflower has developed brown blotches surrounded by black borders. What is this? Is it detrimental to the health of my sunflower? How do I treat it? Thanks, Adam What shape are the blotches What has the weather been What fertilizers have been applied What is your watering practice Do the blotches cross leaf veins Treatment is unlikely, prevention might be possible. The blotches are of irregular shape. They cross leaf veins. The weather has been somewhat stormy, but the blotches appeared before the storms. I water the sunflower thoroughly once a day (it's in a pot). I have not applied fertilizer but there is a slow release fertilizer in the potting mix. |
#5
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Blotches on sunflower leaves
The blotches are of irregular shape. They cross leaf veins. The weather has been somewhat stormy, but the blotches appeared before the storms. I water the sunflower thoroughly once a day (it's in a pot). I have not applied fertilizer but there is a slow release fertilizer in the potting mix. To be more specific, the blotches seem to stay between the veins for a while, but eventually they overtake most of each leaf. |
#6
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Blotches on sunflower leaves
"Adam Schwartz" wrote in message news:s%WOa.18897$H17.6046@sccrnsc02...
The blotches are of irregular shape. They cross leaf veins. The weather has been somewhat stormy, but the blotches appeared before the storms. I water the sunflower thoroughly once a day (it's in a pot). I have not applied fertilizer but there is a slow release fertilizer in the potting mix. To be more specific, the blotches seem to stay between the veins for a while, but eventually they overtake most of each leaf. There are seven kinds of fungal leaf spot disease common to sunflower and one bacterial and little treatment. Generally bacterial diseases stay between the veins and fungal ones cross them but once it gets out of hand even the bacterial ones cross leaf veins. You can clip off affected leaves if you see any spread. |
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