Help me Obi Wan your my only hope

Kushash

Kushash

Well-Known Member
quicksilverhaze said:
Do you know what to look for if it is tar spot, does tar spot make mini catarpillars?
Click to expand...
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.

  • 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.
Look under the leaves to see if it shows on both sides.
 
quicksilverhaze

quicksilverhaze

Active Member
Kushash said:
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.

  • 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.
Look under the leaves to see if it shows on both sides.
Click to expand...
It seems to be only on one side, and i can scrape off a lot of it, they are all black ( no yellow)

there are buga present around the contaminated areas off the plants aswell, so maby more chanse off bug poo then. Is that bad? Any advice on how to handle it?
 
weedstoner420

weedstoner420

Well-Known Member
Kushash said:
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.

  • 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.
Look under the leaves to see if it shows on both sides.
Click to expand...
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
 
Kushash

Kushash

Well-Known Member
weedstoner420 said:
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
Click to expand...
I'll stick with fungus. We shall see.

Tar spotPhyllachora cannabis


List of hemp diseases - Wikipedia
 
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