CMRI held a workshop under the title: ââ?¬Å?Supervising the Operation of Fish Hatchery and Evaluation of Biological Weed Control of Waterways in Aswanââ?¬Â?. The workshop was held at the Central Administration of Irrigation in Aswan in 20/3/2019. To follow-up improving the performance of fish hatcheriesin Aswan water courses to increase the efficiency of biological weed control