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So long cabbage butterflies...for now
The European Cabbage Butterfly has been a problem for growers of cole
crops ever since it became established in the U. S. For better or worse this
two inch butterfly has become a hallmark of late spring and summer as they
lightly flutter through farms, gardens and meadows looking for appropriate
places to propagate where their developing caterpillars ravage the likes of
cabbage and broccoli. The white and light yellow butterflies, even though
an economic evil have become an important part of the summer landscape.
But not this year. It dawned on me last week that I hadn't seen a single
cabbage butterfly on my upstate NY property all season. I then checked on the
downstate property and none there either. I checked on Long Island and
while a few have been sighted the numbers are minute compared to most years.
I then checked with a Cornell entomologist and sure enough he said I was
the second person who had brought this to his attention.
The consensus is that the wet and cool spring has provided an abundance of
fungi that infect the caterpillar state of development much like the
Entomophaga maimaga infects the gypsy moth caterpillar in certain years. I
suspect, but have no way of knowing that it may be the same pathogen that's
doing in the Cabbage butterfly as experiments have shown that Entomophaga can
affect at least 30 species of butterflies.
Don't think you'll find much on this elsewhere so just wondering how many
list readers are noticing the same phenom with the cabbage butterfly?
I did note that in a recent butterfly count in nearby Greenwich, Ct. had
counted 21 cabbage whites in their recent annual census but there was no
indication what the counts had been in previous years.
Andrew
Andrew Messinger
The Hampton Gardener
The Hampton Gardener is a Registered Trade Mark
(Published every Thursday in the Southampton Press, The Press and the
Easthampton Press)
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