Pocket Botanist
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Check these first
- Inspect the undersides of the leaves with a magnifying glass.
- Look for sticky residue on the leaves or stems.
- Check nearby plants to see if the pests are spreading.
Likely causes
Aphids
PossibleHow to tell: It is less common for this plant, but aphids usually appear as tiny green or black insects clustering on the stems. You might see a sticky substance called honeydew on the leaves.
What to do: Wipe the leaves down with a damp cloth or use a gentle stream of water to knock them off. If the infestation persists, apply a mild insecticidal soap once a week.
Spider Mites
PossibleHow to tell: It is less common for this plant, but spider mites usually show up as fine, dusty webbing between the grass blades. The leaves may look speckled or pale.
What to do: Increase the humidity around the plant, as mites dislike moisture. Spray the foliage thoroughly with water every few days to disrupt their breeding cycle.
Find out what's wrong with your barnyard grass
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
When to worry
If you see large colonies of insects or the plant starts to lose color rapidly, take action immediately. A single stray insect is rarely a cause for alarm.
Stopping it coming back
Keep the plant healthy with proper light and moisture, and inspect new plants before bringing them near your grass.
Barnyard grass: pests? Check yours with a photo
Every plant is a little different. Take a photo of your barnyard grass and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I use neem oil on my grass?
- Yes, neem oil is effective, but apply it in the evening to avoid burning the leaves in the sun. Test a small area first.
- Why did my plant get pests?
- Pests are often brought in from outside or hitchhike on other new plants. Keeping your plant healthy makes it less attractive to them.
Guides to these causes
More problems with Barnyard grass
Back to the Barnyard grass guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.