Question
Theres white spots on greeen leafy type vegtable planted in the backyard?  Do you know what might have caused it?

Answer
Roy::

It could be that these plants have a virus. Look very close with a spy glass to make sure there are no mites on the uppper or lower side of he leaf.

sorry I could not be more help and late in answering.

Best wishes.

Don Battles
Farmer in Chiang Rai Thailand