You are here:

Carnivorous Plants/Black Vine Weevil


QUESTION: I came across some info in a book that said Black Vine Weevils can cause major damage to the rhizomes of Sarracenia.  I live in the southern Willamette Valley and we see these around other plantings and rhododendrons making me concerned about my Sarracenias.  

Since you are in Oregon as well have you noticed damage from this pest and if so how have you dealt with controlling it?  Thanks

ANSWER: Hi Doug,

I've never found these to be a problem in the Northern Willamette valley.  They may not enjoy living in the wet peat of Sarracenia media.  If you had to treat for them my first choice would be Acephate since your not going to see the damage immediately.

Good Growing!

Jeff Dallas
Sarracenia Northwest

---------- FOLLOW-UP ----------

QUESTION: Good to hear you haven't had problems with them.  I try to not use chemicals on my plants since I keep bees on the property.  Would submerging the plants up just above the rhizome in rain water (shaded and on one of our cool Fall days)for 24-48 hours possible drowned these and other larvae in the soil?  Would this cause any rhizome rot even if kept cold and done just once?  Thanks!

Hi Doug,

There's a good chance the submersion would work.  The plants these normally attack are not semi-aquatics like Sarracenia.  The Pacific Northwest Insect Management handbook also has other good information on dealing with these.  Here's a link:  They also give recommendations for biological control.  Predatory nematodes sound like a go-to for these in container stock.  Are you actually finding the grubs in your Sarracenia pots, or rhizome damage?

Good Growing!

Jeff Dallas
Sarracenia Northwest  

Carnivorous Plants

All Answers

Answers by Expert:

Ask Experts


Sarracenia Northwest


If your carnivorous plant is showing poor growth, discoloration, abnormal leaves or possible infestation, the expert growers at Sarracenia Northwest can help! They have a great depth of experience dealing with diseases, pathogens, and abnormal growth in carnivorous plants.

Before submitting your question, please read their care guides on their main website. Many issues can be addressed by simply adjusting your growing conditions as recommended in the care guides. Click here to read the care guides.

Over 9,000 questions answered since 2005!


Jeff and Jacob are owners and growers of Sarracenia Northwest. They've been in business since 1995. Watch their professionally produced DVDs, Grow Carnivorous Plants. It is a three-volume set that covers all aspects of carnivorous plant care. They literally show you how to be a successful grower!


No terrariums. No myths. No nonsense.
Just the straight facts from guys who grow and propagate
thousands of carnivorous plants each year.

Our focus is to help help growers diagnose a specific plant problem and offer solutions. For example:
  • Why is my sundew not producing dew?
  • Is now a good time to divide my Sarracenia?
  • Why are the traps turning black?
  • What's a good substitute for perlite?
  • Why didn't my seeds germinate?
  • How do you deal with pests?
  • Can you identify this carnivorous plant for me?
We no longer answer general, how-to questions that are already posted on our website or demonstrated in our DVDs. For general plant care, please read our care guides:

For business questions:

Youtube Facebook
Follow us on Youtube and Facebook!

©2017 All rights reserved.