INTRODUCTION
A trial was run in Central Iowa to evaluate the effect of feeding Tasco^® on performance and amount of pork produced by grower-finisher pigs under heat stress conditions.

RESULTS
Compared to control diet, the inclusion of Tasco^® dramatically decreased the percentage of death loss in the treated group.

CONCLUSION
The pigs fed Tasco^® in summer were exposed to higher temperature than the pigs fed the control diet. The control group had a higher death loss percentage than the Tasco^® group. The addition of Tasco^® in the diet of grower-finisher pigs can help to reduce heat stress and increase performance.