Eastern Flower Thrips on Strawberries
Source: Purdue Fruit Newsletter 5/19/99
High numbers of Eastern Flower Thrips have been reported on late
blooming strawberry varieties in the Bedford area.
Growers should scout their
for this pest. As you may recall,
thrips were a serious problem
across the Midwest
in 1994. Since that time we
have not seen
serious problems with this pest.
should scout their plantings to
avoid the major
losses that occurred in 1994.
the consensus of
the fruit entomologists in the
discussions with entomologists from
country, that 10 thrips per flower is a
threshold. We must admit, however,
threshold is not based on hard data, but is
our best guess. We
all agree that it is important
that growers not
treat during bloom unless they
have some evidence
that an insecticide spray is
needed. Our bee
colonies are in serious trouble,
so we need to
protect them as much as possible.
recommend that growers scout for
thrips in their
strawberry flowers and confirm that
thrips are present
before applying insecticides.
Thiodan or Lorsban
appear to be the best insecticides for thrips control. See ID-169 Indiana Commercial Small
Fruit & Grape Spray Guide for
information regarding this pest.