Is it true that ILTs installed within five feet of the floor capture more flies than ceiling-hung traps?

The statement is true because Integrated Light Traps (ILTs) that are installed closer to the floor, specifically within five feet of the ground, tend to be more effective at capturing flies compared to those hung at ceiling height. This effectiveness is primarily due to the flight habits of many types of flies, which often tend to be found at lower altitudes, especially in areas where they are attracted to light.

Flies are more active at lower levels where food sources and breeding sites are typically located. When ILTs are positioned closer to where flies are more frequently found, they utilize the combined attractant effects of light and possibly other baits, leading to increased capture rates. The physical dynamics of air movement at lower heights can also contribute to better trap performance, as flies are more inclined to encounter the ILTs in these areas.

The other options might suggest varying conditions under which ILTs could perform differently, but the general principle regarding the preferred height for maximized fly capture remains firmly established in pest management practices. Therefore, having ILTs within five feet of the floor is a well-supported approach for effectively controlling fly populations.