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{Disarmed} Re: Something eating blossoms


The Siberian Iris is the snack of choice of the iris bud fly (Orthacheta dissimilis)
 
 
 
entry wound from Orthocheata
Orthochaeta damage -Dirigo Black Knight
 
 
(from Sibrob June '06 - I posted this) I have included a bad photo (only one I had) of the entry spot (wound) on 'Dear Currier' (Dunlop). The iris bud fly sure knows how to pick them.....  but I had two bloom stalks on Dear Currier (first year planting) and the other one is blooming now. ;-) I broke off the whole other stalk and threw it away (not in the compost pile since I think it was inside chewing away. Orthacheta Bud Fly
 
While visiting Dean Cole's garden on Saturday, he had a little bit of Orthacheta dissimilis  but I had fly damage only in my back garden. Nothing in the front where most Siberians are happily blooming now. I am in peak Sib. bloom and also peak TB bloom..... the late Sibs are still in bud.
 
Ellen G.
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From a Google search this morning _ March 15th, 07
 
"Orthacheta Bud Fly: The bud fly lava is a hybridizer?s nightmare, it is a small white maggot that bores into the side of an iris bud to eat the pollen in side. The standards and style arms are usually destroyed in the process. When the blossom opens it is disfigured. They like siberian irises best, but will attack other irises including louisiana iris. When you see a small hole in the side of a bud or a disfigured blossom, remove it and check the stem. If there is no sign of passage, then you have it. Carefully break the bud or blossom apart, look for the maggot and destroy it. You can also put them into a zip lock bag for destruction. If the stem shows sign of passage, then the maggot has gone down the stem to change into the fly. Another good way to control an out break of the Orthacheta Bud Fly is to spray with a systemic when the buds have formed, this can be done when spraying for iris borers. "
 
Ellen
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