Pest identification
What's eating my shenandoah switch grass?
Aphids
Signs: Clusters of soft green insects on stems causing sticky honeydew and mild yellowing of lower foliage
Control: Dislodge with a water jet; apply insecticidal soap or neem oil for heavier infestations; encourage ladybirds and lacewings
Fall armyworm (Spodoptera frugiperda)
Signs: Overnight defoliation of blades in late summer; chewed stems and frass visible at the crown
Control: Apply Bacillus thuringiensis (Bt) or spinosad at first sign of caterpillars; treat evening when larvae are active
Grasshoppers
Signs: Ragged chewing on leaf blades during dry summer spells, rarely severe enough to threaten the plant
Control: Tolerate minor damage on established plants; neem oil spray deters feeding; insecticides rarely needed
Keep shenandoah switch grass pest-free
Healthy plants resist pests best. Get the basics right:
Shenandoah Switch Grass pests — FAQ
What is eating my shenandoah switch grass?
Shenandoah Switch Grass is highly deer resistant and largely pest free in garden settings. Aphids are the most common visitor, gathering on stems in early summer. Fall armyworms can strip blades during late-summer outbreaks in warm regions. Grasshoppers may graze during hot, dry spells. Overall impact is minor on established clumps.
How do I get rid of aphids on shenandoah switch grass?
Clusters of soft green insects on stems causing sticky honeydew and mild yellowing of lower foliage Dislodge with a water jet; apply insecticidal soap or neem oil for heavier infestations; encourage ladybirds and lacewings
How do I get rid of fall armyworm (spodoptera frugiperda) on shenandoah switch grass?
Overnight defoliation of blades in late summer; chewed stems and frass visible at the crown Apply Bacillus thuringiensis (Bt) or spinosad at first sign of caterpillars; treat evening when larvae are active
How do I get rid of grasshoppers on shenandoah switch grass?
Ragged chewing on leaf blades during dry summer spells, rarely severe enough to threaten the plant Tolerate minor damage on established plants; neem oil spray deters feeding; insecticides rarely needed