hey bro got a tip for you that works well for the powder mildew,i use to fight it too,i learned that once you have it,the soil will also get it,so when it jumps up my ass,i take the first 2in of soil and dump,problem solved,i kept getting it on my squash plants bad,i get about 3 harvest and replant a year,kept getting it younger and younger in the plant life,mama got to goggling it and found that once it get on the soil from just watering ,it will go down into the soil and stay active,so last 2 years i tried removing the soil from top 2 inches,worked,first time after i found this out ,i dumped all the soil and started over,lot of work in a container garden,got some in my raised bed,hell with that and took top 2 inches off and hadnt been back since