Page 13 - index

These fy maggots
can be controlled with late
applications of Cygon 2E,
however, we had made a
decision many years ago
to discontinue use of this
chemical because of its
extreme toxicity. While it
is likely that applications of
Imidicloprid to siberian buds
might kill the fy maggots, we
chose not to use this chemical
on the fower buds because of
possible toxicity to bees. So
Orthocheata damage we needed to fnd some way
to fght back. We needed more information. What is the life cycle of this pest? Where
does the maggot pupate? (Some have suggested it happens in the bloom stalk, some
have suggested in the ground around the plant.) When do the fies hatch in the spring?
What do they look like? How big are they? We were thrilled when the The Siberian
Iris (a.k.a. TSI - the biannual publication of the Section for Siberian Iris of the American
Iris Society) arrived last Spring with a picture of Neorthocheta dissimilis on the cover.
All these years enduring the damage caused by this fy maggot, and suddenly we had a
wanted poster!


Orthocheata pupae and damage

Canadian Iris Society Newsletter 11