The ornamental design for an insecttrapcartridge, as shown and described.
FIG. 1 is a perspective view of an insect trap cartridge embodying our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is bottom view thereof.
In various alternatives of the embodiments shown, the insect trap cartridge may be depicted, in whole or part, in a grey, white or silver color or combination thereof.