anox^GS1189 larvae exhibit a significant reduction in weight gain, a delay in pupation, a significant decrease in feeding activities under both starvation (which increases the feeding rate of controls) and normal feeding conditions, and a significant decrease in mouth-hook contraction rates when larvae put into agar containing yeast or standard diet components while there is no change in mouth-hook contraction rates when larvae put into water compared to controls.

anox^GS1189 adults exhibit a significant decrease in feeding activities, a decrease in sugar (sucrose and glucose) induced action potentials in taste sensilla and a significantly shorter life span with earlier mortality (more obvious in males than females) when compared to controls.

While control larvae show a clear preference for soybean-containing food over corn-containing food and the amount of soybean food eaten increases linearly within a 60 minute period, larvae mutant for P{GSV1}CG33714^GS1189 (which is associated with CG33713^GS1189 and CG33714^GS1189) do not show any such preference or any increased soybean food intake after 60 minutes.

Unlike control larvae, which show a clear feeding preference for yeast extract food, larvae mutant for P{GSV1}CG33714^GS1189 (which is associated with CG33713^GS1189 and CG33714^GS1189) do not show any significant feeding preference at all.

When larvae are introduced to the centre of two wells, one filled with yeast-containing agar and the other filled with just agar, larvae mutant for P{GSV1}CG33714^GS1189 (which is associated with CG33713^GS1189 and CG33714^GS1189) take much longer than controls to reach the yeast-containing agar.

In contrast to controls, larvae mutant for P{GSV1}CG33714^GS1189 (which is associated with CG33713^GS1189 and CG33714^GS1189) are not attracted to low concentrations of propionic acid or yeast.