Insect burrowing under the stem

  • Thread starter TurningGreen
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TurningGreen

TurningGreen

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Hello people, I have a purple bud plant which has just sstarted flowering and I'm quite happy with it, but I discovered various yellow leaves that have been partially eaten and I just noticed an insect that carved the stem and burrowed under it. It's not the main stem so I guess I could cut it but I wanted some opinions. You can check more plant pictures from my previous post.

Plant "sawdust"

Insect burrowing under the stem


"Sawdust", hole in the stem, swelling

Insect burrowing under the stem 2


Similar as above

Insect burrowing under the stem 3


Plant pic

Insect burrowing under the stem 4


1. Are you growing from seed or clones?
Seeds
2. How old are your plants?
17 weeks
3. How tall are your plants?
70 inches
4. What size containers are they planted in?
30 liters
5. What is your soil mix?
normal soil
6. How often do you water and what type of water do you use?
little less than once a day
7. What is the pH of your water?
-
8. What kind of fertilizer do you use and what is its NPK ratio?
not often, once a week and in low quantity
9. Do you foliar feed or spray your plants with anything?
no
10. What kind of lights do you use and how many watts combined? (HPS, MH, fluorescent, halogen, incandescent "plant lights")
outdoor
11. How close are your lights to the plants?
around 93 million miles
12. What size is your grow space in square feet?
2.7
13. What is the temperature and humidity in your grow space?
-
14. What is the pH of the soil?
-
15. Have you noticed any insect activity in your grow space?
grasshoppers, ants, various as there are lots of plants around
16. How much experience do you have growing?
first time
 
TurningGreen

TurningGreen

12
3
I'll do it tomorrow. Since they are the lowest branches should I just cut them off whole? There aren't any flowers before the insect ones, maybe a single one (it's going to be a nugget for sure)
 
Oldchucky

Oldchucky

Supporter
4,497
263
I’ve seen where people will take a needle and poke a bunch of holes where they think the critter is. Hopefully impale it and kill it. Don’t know what affect a dead insect inside of the stalk Might have, but it might be worth a look. Just two cents. Good luck!
 
Deadstill

Deadstill

I'm from the government, and I'm here to help.
Supporter
2,161
263
Whatever it is, I can almost guarantee it's laying eggs in there.. Chop that branch.
 
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mysticepipedon

mysticepipedon

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It's a borer of one kind of another, possibly a Eurasian hemp borer. They're tough to kill once they're inside. You might consider spraying your plants with Bt to prevent further damage. There are also beneficials that control them, before they're in the plant. Check Arbico Organics website.

I believe the "saw dust" is worm poop.
 
TurningGreen

TurningGreen

12
3
Thanks to everyone for your inputs.

This is the larvae I found inside. It carved a 2/3 cm long space. But I discovered another branch, this time higher and with more flowers that I'd really like not to cut.

> It's a borer of one kind of another, possibly a Eurasian hemp borer.

looks like it, I'll try getting some BT as you said

20220904 103744
 
TurningGreen

TurningGreen

12
3
I sprayed some BE, so fingers crossed... I have a branch that I may need to cut, the insect hole borders are getting dark, opinions?

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