Fruit fly trapping guide - IAEA Publications - International Atomic ...

mates traps have to be re-baited twice per week,
whereas, under hot and humid/dry conditions rebait
interval is once per week. When liquid lures
are used (e.g. liquid trimedlure or hydrolyzed proteins)
it is important to avoid spillage or contamination
of the external surface of the trap body as
well as ground contamination. This would reduce
the chances for flies entering the trap. For traps
that use a sticky insert to capture flies, it is important
to avoid contaminating, with the sticky material,
areas in the trap that are not meant for catching
flies. This also applies for leaves and twigs
that are in the trap surroundings.
In general the estimated number of traps serviced
per day per person for most of the traps is 30. The
exception is the McP type traps baited with liquid
protein that requires more time. The number of
McP type traps typically serviced per person per
day is 25. The actual number will vary depending
on host density, environmental and topographic
conditions and trapper experience.
Flies per trap per day (FTD)
The flies per trap per day is a population
index that estimates the average number of flies
captured in one trap in one day that the trap is
exposed in the field. The function of this population
index is to have a relative measure of the size
of the adult pest population in a given space and
time. It is used as base-line information to compare
the size of the population before, during and
after the application of a fruit fly control programme.
In areas where sterile flies are being released
it is used to measure the relative abundance of the
sterile flies and thus assess the ratios of sterile to
fertile flies in the field.
Its value is the result of dividing the total
number of captured flies by the product obtained
from multiplying the total number of serviced traps
by the average number of days the traps were exposed.
The formula is as follows:
F.T.D. =
where,
F
TxD
F = Total number of flies
T= Number of serviced traps
D= Average number of days traps were exposed
in the field
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