Pest identification
What's eating my silky wisteria?
Aphids
Signs: Soft green or black insects clustered at growing tips; honeydew drips onto lower leaves, fueling sooty mold.
Control: Spray with water or insecticidal soap; introduce beneficial insects; avoid excess nitrogen fertilizing.
Scale insects
Signs: Bark-encrusting waxy bumps; slow decline in vigor, yellowing foliage, and sticky surfaces below infested stems.
Control: Dormant oil spray in late winter; hand-scrub accessible stems; insecticidal soap for mobile crawlers in spring.
Japanese beetles
Signs: Lacy skeletonized leaves after adults feed in groups; worst in July–August; can weaken flowering performance the following season.
Control: Hand-pick early morning; pyrethrin or spinosad spray; apply beneficial nematodes to nearby lawn to reduce grub populations.
Keep silky wisteria pest-free
Healthy plants resist pests best. Get the basics right:
Silky wisteria pests — FAQ
What is eating my silky wisteria?
Silky wisteria faces the same core pest threats as other wisterias: aphids on tender new shoots, scale on woody stems, and Japanese beetles defoliating foliage in summer. Being a Japanese native species, it has similar susceptibility to North American beetle pests. Keep it vigorous and monitor for borer entry wounds on the trunk.
How do I get rid of aphids on silky wisteria?
Soft green or black insects clustered at growing tips; honeydew drips onto lower leaves, fueling sooty mold. Spray with water or insecticidal soap; introduce beneficial insects; avoid excess nitrogen fertilizing.
How do I get rid of scale insects on silky wisteria?
Bark-encrusting waxy bumps; slow decline in vigor, yellowing foliage, and sticky surfaces below infested stems. Dormant oil spray in late winter; hand-scrub accessible stems; insecticidal soap for mobile crawlers in spring.
How do I get rid of japanese beetles on silky wisteria?
Lacy skeletonized leaves after adults feed in groups; worst in July–August; can weaken flowering performance the following season. Hand-pick early morning; pyrethrin or spinosad spray; apply beneficial nematodes to nearby lawn to reduce grub populations.