Re: Iris Budfly

 On Mon, 16 Jun 1997, Ellen Gallagher wrote:

> 	(snip)
> >Chris writes in June 1997...
> >Unfortunately I have to report an occurrence of this problem again this
> >year.
> >The blooms of a couple of nice Siberians have been damaged by this pest.
> >
> >Interestingly, it seems by casual observation that the beardless I.
> >versicolor which also grows very nearby in this garden is infested the
> >worst. (possibly the center of the infestation). Any documented or other
> >
> >association here?
> 
> 	Yes, Chris - the 'bud fly' was first reported in I. versicolor
> 	by Sarah Tiffney. It seems to occur in those areas where I. versi-
> 	color is native....colder Eastern climates, if you will.  I have
> 	PARTY LINE (I. versicolor hybrid) at the apex of my triangular
> 	bog bed with MESA PEARL and TEMPER TANTRUM (both Siberians) right
> 	near it....along with 10 other apogons. :-(
> 
> >Siberians close by are infected but those further away
> >are not showing any signs of problem (yet).
> 
> 	In 1995, only one Japanese iris, EVENING EPISODE, was affected with
> 	*all* buds destroyed. The JIs in the same area were fine. In 1996,
> 	EVENING EPISODE was not touched and bloomed fine *but* some of the
> 	buds on LITTLE SNOWMAN and also one bud on MOUNTAIN GROTTO and two
> 	on SAPPHIRE STAR (both early blooming JIs) were destroyed. The
> 	others blooms on those plants were fine. Also last year, only two
> 	Siberians were 'attacked' and it was late in the season. Again,
> 	most of the buds on WHITE TRIANGLES and SKY WINGS were untouched.
> 
>  	My first Siberian bloomed today (INDY) so can't comment yet.
> 	However, one of the first buds of WHAT AGAIN (SDB), had
> 	two tiny holes in it and when it opened, some of the flower was
> 	damaged...could have been anything.
> 
> >Borer infection also appears to centralize around this plant. No sprays
> >applied this year... yet.
> 
> 	I don't spray with anything....
> 	Here's hoping, 	Ellen Gallagher
> Ellen Gallagher	\ e_galla@moose.ncia.net \ Lancaster, New Hampshire,USA
>   USDA Zone 3a \ Northern White Mountains\ AIS Region 1 {New England}

I sprayed twice with Cygon. Sprayed all the I versicolor and all
the I pseudacorus and all the TB's. So far a couple of the I vers
flowers were chewed (damaged) and a couple of the I pseuda and none
of the TB's. I don't have enough SI's to estimate whether they
could have been damaged. Hard to say whether the I vers was the
centre of the attack or not. My JI's are not out yet.

Diana Louis <dlouis@dynamicro.on.ca> <- private email address
Zone 4 Newmarket, Ontario, Canada 
AIS, CIS, SIGNA, IRIS-L, Canadian Wildflower Soc.
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