Question
I have a Toro DDC controller. Using six Stations,Number One continues to run in conjuction with 2 3 4 5 6 I have replaced the
Solenoid, no luck, could this be the Controller if so I will replace
                                     Thank You

Answer
don't buy a controller yet. I will admit that your use of "reticulation" threw me for a moment because I have heard it used only with film development... good word use - anyway - It sounds to me like zone 1 is wired to the MV circuit. this is sometimes also called or labeled "pump" or "master valve" or "mv." open the controller and make sure that your wires coming in from outside go to zone terminals (labeled 1,2,3,4...)and not to the sensor or mv terminals. and of course your common wire coming in from outside (the one that goes to every valve - usually white) needs to be on the terminal marked "c" or "common." if you have a master valve or pump, make sure it is on the correct terminal.

you'll need a small screwdriver and maybe a wire stripper. give that a try and let me know what happens - good luck!