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A: There would be no harm in accidentally eating a leaf miner larva from your spinach leaves. In the case of leaf miners, you need to cut away the part of the leaf where they are feeding. You can't just brush them off, as they are actually inside the leaf.
Beside this, what will kill leaf miners?
The most common method to rid plants of leaf miners is to spray general pesticide on the infected plants. The trick to this method of how to kill leaf miners is to spray at right time. If you spray too early or too late, the pesticide will not reach the leaf miner larva and will not kill the leaf miner flies.
Also know, are leaf miners bad?
Leaf miners do not always make the list of most serious pests, but they can become problematic in gardens when not controlled. The most common leaf miners are the larvae of tiny yellow and black flies belonging to the genus Liriomyza. They attack a large number of vegetables and ornamental plants.
According to Joshua Melanson, an organic farmer at Pumpkin Pond Farm, “there is absolutely nothing wrong with the kale. The flea beetle creates small holes but doesn't transmit any disease. There is simply less kale.” Apparently, it isn't just kale that flea beetles like to feast on.