Knowledgebase
possible crane fly larvae problem??? #924160
Asked February 02, 2026, 8:21 PM EST
Lane County Oregon
Expert Response
Joyce
Crain flies do not damage plants in this manner. They require a very moist environment to work in and survive in. Other potential pests include grasshoppers, rodents, and rabbits.
I have a few questions for you that will help me pinpoint who is causing the damage.
- Are the plant/seedling completely consumed or are there still parts of plants left?
- Do you or have you seen any slime trails?
- What other plants are close by, and have you found any damage to them?
- How long has this plant damage been occurring?
Let me know if you have any additional questions. Thank you for contacting us at Ask Extension. Rich
On Feb 6, 2026, at 9:07 AM, Ask Extension wrote:
Joyce
- Crane flies need moist environments, damp soil, and decaying organic matter where their larvae live and feed, adults seek mates in grassy areas.
- The larvae live in soil and feed on roots, thriving in wet conditions like irrigated lawns.
Your answers were most helpful. One thing your answers confirmed to me was that Crane Flies are not the cause of the plant damage. Whatever is chewing up the plants has ‘chewing mouth parts such as Grass hoppers, caterpillar, small rodents. These are the more likely pest eating your plants.
I have a suggestion for you that may catch who is eating your plants. Not sure you will catch anything this ‘winter’ period but if you put out pans like you to cook brownies in and fill them about half way with soapy water the pest may fall in the water and drown. You will have your pest.
Let me know if you have any additional questions. Thank you for contacting us at Ask Extension. Rich
On Feb 8, 2026, at 10:40 AM, Ask Extension wrote: