Everything about potatoes for 2021

[Did67]

At the Olympic Games of the PdT, I would not have had a medal!
30 to 40% of the production thrown away, potatoes completely rotten (like liquid mash) under the hay, especially the big ones.
PdT Bernadette, plans bought in a garden center, planted under hay at the beginning of April. The aerial part of the shots was superb, but after the heavy rains of July 12/13, the foliage had somewhat disappeared with traces of mildew (dark spots on the leaves). But the stems had remained relatively green and firm, so I was pretty confident.
I expected to find "marked" tubers but not as many ravaged and also found apparently healthy potatoes (often smaller) right next to other rotten ones on the same footing.
Perhaps I should have intervened earlier, as early as July 14?
The devastation of late blight on tomatoes, I knew, but first experience for PdT (if it is mildew?).
It remains for me to closely monitor the conservation of what I have been able to save.

The potatoes rotten like mash, it is not the mildew but rather bacterial rots ...

[Moindreffor]

At the Olympic Games of the PdT, I would not have had a medal!
30 to 40% of the production thrown away, potatoes completely rotten (like liquid mash) under the hay, especially the big ones.
PdT Bernadette, plans bought in a garden center, planted under hay at the beginning of April. The aerial part of the shots was superb, but after the heavy rains of July 12/13, the foliage had somewhat disappeared with traces of mildew (dark spots on the leaves). But the stems had remained relatively green and firm, so I was pretty confident.
I expected to find "marked" tubers but not as many ravaged and also found apparently healthy potatoes (often smaller) right next to other rotten ones on the same footing.
Perhaps I should have intervened earlier, as early as July 14?
The devastation of late blight on tomatoes, I knew, but first experience for PdT (if it is mildew?).
It remains for me to closely monitor the conservation of what I have been able to save.

The potatoes rotten like mash, it is not the mildew but rather bacterial rots ...

I noticed that in my house the rotten potatoes of the interior as you describe have a whole small hole maybe the entrance of the infection made by something, some pest, on the other hand it quickly turns all black
and it is indeed especially the biggest, like what, wanting to have the biggest is not always a winner

in addition it begins with the heart which seems to liquefy, then I find some affected, it starts then it spreads in the shape of a star, then that by becoming more and more black

[jft78]

The potatoes rotten like mash, it is not the mildew but rather bacterial rots ...

I noticed that in my house the rotten potatoes of the interior as you describe have a whole small hole maybe the entrance of the infection made by something, some pest, on the other hand it quickly turns all black
and it is indeed especially the biggest, like what, wanting to have the biggest is not always a winner

in addition it begins with the heart which seems to liquefy, then I find some affected, it starts then it spreads in the shape of a star, then that by becoming more and more black

If it's bacterial, can it come directly from the plants or from a pest, or from a disease "just" developed because of the high humidity over a long period of time?
I find it hard to say if there was a small hole, the PdT were so "liquefied". The interior was still white, the skin brown.
Indeed, as noted above by Doris, I should have taken pictures.

[Doris]

I noticed that in my house the rotten potatoes of the interior as you describe have a whole small hole maybe the entrance of the infection made by something, some pest, on the other hand it quickly turns all black

Yes, I had small holes it's true, and I had, from memory, found small worms where larvae, but it's always the same: little loss = insignificant in the eyes of a sloth = no photo , no note, nothing at all

[Did67]

The potatoes rotten like mash, it is not the mildew but rather bacterial rots ...

I noticed that in my house the rotten potatoes of the interior as you describe have a whole small hole maybe the entrance of the infection made by something, some pest, on the other hand it quickly turns all black
and it is indeed especially the biggest, like what, wanting to have the biggest is not always a winner

in addition it begins with the heart which seems to liquefy, then I find some affected, it starts then it spreads in the shape of a star, then that by becoming more and more black [/ quote]

Often, the small "black" galleries are the holes of wireworm larvae.

Wet years are of course blessed for bacteria!

https://www.iriisphytoprotection.qc.ca/ ... ageId=8855

[jardama]

I see the same problem. First brown spots and already rotten parts and in eight days, it is the disaster. On 30 kg I threw almost everything.
This morning I continue the harvest (charlotte). and surprise no problem on those that I pick up which are however just next door, some of which are well eaten by mole rats.
A little further on, potatoes grown under a layer of hay, also a charlotte variety, I don't see any problem.
All that weird.

[Biobomb]

Last pot of the 2020 harvest, Agria. Proof is that they keep for 1 year by taking only a few wrinkles. Excellent again this day mashed. The welding is done.

[jft78]

The potatoes rotten like mash, it is not the mildew but rather bacterial rots ...

I noticed that in my house the rotten potatoes of the interior as you describe have a whole small hole maybe the entrance of the infection made by something, some pest, on the other hand it quickly turns all black
and it is indeed especially the biggest, like what, wanting to have the biggest is not always a winner

in addition it begins with the heart which seems to liquefy, then I find some affected, it starts then it spreads in the shape of a star, then that by becoming more and more black

Often, the small "black" galleries are the holes of wireworm larvae.

Wet years are of course blessed for bacteria!

https://www.iriisphytoprotection.qc.ca/ ... ageId=8855[/ Quote]

Thank you Didier for the link. Very informative !
I found two copies that had not yet been discarded. And so photo below.

[alkaline]

Is this mildew?
Black spots on the leaves?

[Biobomb]

Is this mildew?

It's not mildew. The holes in the leaves are either due to a predator-insect, but not sure whether it is the Colorado beetle, or powdery mildew.
In my opinion it's okay because it looks like the foot is ripe. So qq little devoid of defense.