A SAS program to calculate median lethal dosage (LD_(50))

A SAS program to calculate median lethal dosage (LD_(50)) of pesticides, named LD50-SAS, was developed based on the algorithms established by Bliss. The program employs original experiment data and inner functions and procedures, supplied by SAS system, to calculate LD_(50) and related parameters; hence it avoids the annoyed processes of looking up probit and weighting coefficient tables. Validating results revealed that LD_(50)-SAS is a reliable and efficient program of calculating LD_(50)and its related parameters. The calculating results of LD_(50)-SAS are reliable and accurate. The program was provided in text mode, so it was easy to edit and easy to used. Most importantly, the algorithms of the program were unconcealed and easy to be checked.