The Q&A Archives: Deterring Leaf Minors on Tomato

Question: Can anything be done to discourage leaf minors on tomato plants? Wayne Baker Houston, TX

Answer: Unless your plants are heavily infested, leafminers should not have much effect on fruit quality or yield. To discourage leafminers, practice good sanitation: clean up all plant debris throughout the season (prunings, etc.) and at the end of the seasonand destroy. Early in the growing season, you can inspect plants regularly for leaf "mines"--these indicate the presence of a growing larva inside--and pluck these leaves and destroy. Of course once the plants are infested, you can't pluck all those leaves! You can also over the young transplants with a floating row cover such as Reemay early in the season to prevent the fly from laying eggs on the leaves.

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