Everyone, make sure you change your clothes and wash up before going to your grow after looking at this. Yikes.
Do you know what to look for if it is tar spot, does tar spot make mini catarpillars?Looks like tar spot.
Have you got any idea what it is?Everyone, make sure you change your clothes and wash up before going to your grow after looking at this. Yikes.
Semi outdoor~ garageOutdoor or indoor?
It's a fungus.Do you know what to look for if it is tar spot, does tar spot make mini catarpillars?
It seems to be only on one side, and i can scrape off a lot of it, they are all black ( no yellow)It's a fungus.
Here is a useful link.
Tar spot: What to expect for the remainder of 2020 - Michigan Farm News
Cool and wet conditions are ideal for tar spot development.
Is it bug poop or tar spot?
We often get false reports of tar spot which turn out to be insect frass (poop). To distinguish tar spot from insect frass check for these features.
Look under the leaves to see if it shows on both sides.
- Tar spot lesions look like small black spots that have a slightly raised appearance to them.
- Tar spot lesions will have a very faint yellow halo to them, sometimes this progresses into very distinctive fisheye symptoms, where necrotic (dead) tissue surrounds the black tar spot lesion.
- The black tar spot lesion will follow the leaf veins, though this can be subtle.
- Finally tar spot lesions will form on the upper leaf surface first but will protrude through the bottom side of the leaf, so turn the leaf over and check to see if the lesion is on both sides. Insect frass will be on one side of the leaf and will often scrape off the leaf surface, or may require water/spit to dissolve off the corn leaf. Tar spot lesions will not dissolve.
WTF
That article is talking about corn, and says "Thankfully this disease does not infect other crops, but may infect some grass weed species." Cannabis is a dicot, grasses are monocots, so they're pretty far apart evolutionarily speaking. Not sure if tar spot could even infect cannabis... My vote is bug poopIt's a fungus.
Here is a useful link.
Tar spot: What to expect for the remainder of 2020 - Michigan Farm News
Cool and wet conditions are ideal for tar spot development.
Is it bug poop or tar spot?
We often get false reports of tar spot which turn out to be insect frass (poop). To distinguish tar spot from insect frass check for these features.
Look under the leaves to see if it shows on both sides.
- Tar spot lesions look like small black spots that have a slightly raised appearance to them.
- Tar spot lesions will have a very faint yellow halo to them, sometimes this progresses into very distinctive fisheye symptoms, where necrotic (dead) tissue surrounds the black tar spot lesion.
- The black tar spot lesion will follow the leaf veins, though this can be subtle.
- Finally tar spot lesions will form on the upper leaf surface first but will protrude through the bottom side of the leaf, so turn the leaf over and check to see if the lesion is on both sides. Insect frass will be on one side of the leaf and will often scrape off the leaf surface, or may require water/spit to dissolve off the corn leaf. Tar spot lesions will not dissolve.
No, i have not seen anything like your bud.. but, whats going on there?Grow it end up like this.??????
I'll stick with fungus. We shall see.That article is talking about corn, and says "Thankfully this disease does not infect other crops, but may infect some grass weed species." Cannabis is a dicot, grasses are monocots, so they're pretty far apart evolutionarily speaking. Not sure if tar spot could even infect cannabis... My vote is bug poop
Tar spot | Phyllachora cannabis |