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How To Identify Leaf Miner Damage On Your Marijuana Plants


Leaf miners are any number of insect species whose larvae burrow between the epidural layers of leaves, feasting on the plants’ cells as it goes.  Leaf miners leave a tell-tale trail behind them, evident by a white or brown squiggly pattern on the tops of the cannabis leaves.

Adult leaf miners are often flies resembling the house fly.  They lay eggs on the underside of the leaves.  Once the eggs hatch, the larvae emerge to burrow between the leaves’ layers.

Because they burrow and are protected by leaf on all sides, leaf miner maggots are resistant to pesticides.  The easiest way to kill them is to squish them dead in their den and remove the affected leaves. Download my free marijuana grow bible and learn more about marijuana pests and diseases.

Introducing a parasitic wasp to dine on the larvae and using yellow sticky tape to capture adults are effective methods of eradication. Although they leave ugly trails, leaf miners serve no real threat to the cannabis farmer.

All top quality marijuana seeds are available in my marijuana seed shop. We ship seeds to the US, CA and many other countries. For any growing related question please visit the marijuana support page. Make sure to download my free grow guide.

Source: ILoveGrowingMarijuana.Com



About Author

Robert Bergman is a master marijuana grower. Robert Bergman is the author of 'Marijuana Plant Care' and 'The Marijuana Grow Bible'.


  1. If you have a good solid outdoor grow, you can actually buy and add some of the good insects like Praying Mantis and ladybugs. Don’t think they sell em at Lowes/Home Depot anymore, but they can be bought in bags and boxes. Ants also like eating other bugs, and as a bonus will aerate the soil! :) Those three bugs, and bees/wasps, will kill the bad bugs and not hurt the plants. They WILL spread pollen though, so remember that if you’re going for Sensimillia :)

  2. For the first time this year I got some of these outdoors. Thanks for the info! They are not bad, and flowering season is right around the corner here, so not too worried, but at least I know what they are now!

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