Cabbage Plants

What Is the Source of Root Maggots in My Garden

danlee58 added on April 12, 2012 | Answered

I am having a problem with root maggots in my garden. They have all but destroyed my cabbage and brussels sprouts. They also have infested my onions. I cut a small potato in half, and skewered each half on a stick. I then buried the potato halves in different parts of my garden. After 3 days, I pulled the potato halves up and examined them. I found one root maggot on one half and 3 root maggots on the other. The potato halves were buried too deep for a fly to lay eggs. Unless the potatoes carried fly eggs, the maggots must have hatched from eggs in my soil. Did I till-in fly eggs that overwintered near the surface? Did the fly eggs come with the composted horse manure that I tilled into my soil?

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Certified GKH Gardening Expert
Answered on April 13, 2012
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