Sharing tomato seeds

[Alex]

How can you be sure it was due to heat, not some other factor?

This is very easy to determine. I know when there have been particularly hot days, I monitor the effect of the heat on all my tomatoes (I have about 70 different ones). Young leaves, especially the tops, get burned and a burn occurs. All my plants are in the shade, not under the sun, they are only affected by the heat.

[Alex]

Do other Solanum cheesmaniae accessions that did not spend generations adapting to a northerly high elevation short season climate retain their vigour?

I have several S. cheesmaniae hybrids, they are doing well and survived the last hot summer normally.

[Alex]

"SI x SI" from Joseph:



S.cheesmaniae (HRSeeds) was not better:

[Alex]

I double checked. This is not S. cheesmaniae from Joseph, it is alive, this is from HRSeeds. Loss of heat resistance may have occurred in Poland. Many seeds from Poland are now in question.

[Justin Jardinier]

If it's this one:
https://www.hrseeds.com/galapagos-island-tomato-2

then he spells it wrong ("Solanum cheesmanii") and though he claims:

Some of the them are natural hybrids that crossed with solanum pimpinellifolium which are an invasive species in the archipelago. This variation seems to be from the original plants on the island.

I am pretty sure it is in fact a lycopersicum hybrid.

[Adrian]

Alex, what had the t° at the period of thoses pictures was take?
The leafs under seem healthy.
The leafs  under are also necrosis?
They all growed in the same soil?

In what soil they growed?
If the leafs under are healthy it seem more dor me at a small micro-nutrient deficiency.

[Alex]

If it's this one:
https://www.hrseeds.com/galapagos-island-tomato-2

https://www.hrseeds.com/galapagos-island-tomato-type-3

I am pretty sure it is in fact a lycopersicum hybrid.

Yes, I grow it too. I do not like it. Not my taste. But it grows well.

[Justin Jardinier]

Yeah, maybe that one is genuine. It's hit and miss with him, he has a lot of misinformation on his site and is (or has been with me at least) entirely immune to feedback.

[Alex]

Alex, what had the t° at the period of thoses pictures was take?

A few days later after several hot days.

The leafs  under are also necrosis?

If it gets even hotter, then yes.

They all growed in the same soil?

Yes.

In what soil they growed?

Mix of soil, sand, chalk.

If the leafs under are healthy it seem more dor me at a small micro-nutrient deficiency.

This is out of the question; I apply fertilizer. These are features of the tropical climate. The weak parts of the plant, and these are the growing points, are burned. You can fry eggs on the asphalt in summer. The plant may produce stepsons, trying to survive, but they get burned again. So the plant balances on the edge of life and death, it either survives, does not reach flowering, will never produce fruit, or dies. It's cooler in winter, but even that may not be enough. All my plants are in equal conditions.

[Alex]

Yeah, maybe that one is genuine.

It has small seeds, characteristic of pure S. cheesmaniae in size, in addition, it germinates very poorly due to the thick seed coat. It grows very slowly, S. cheesmaniae from Joseph grows very quickly.

[Joseph Lofthouse]

Summer high temperatures in the Galapagos Islands range about 20F cooler than my climate.  And summer night-time temperatures range about 20F hotter than my climate.

[Adrian]

In italy,farmers expand a shadow veil who protected of the too strongs sunshines rays of the some fields. It seem not very expensive and efficient.
https://www.ilgiardinocommestibile.it/suggerimenti/lombreggiatura-come-proteggere-il-giardino-dal-sole-reti-ombreggianti-e-altre-soluzioni/

The soaking 24 at 48 hours in water can help thoses seeds to germinated more easily.
In the coat seed stayed sticky at the cotyledons i wet the her many times by day and put a mini greenhouse above the planters for improved the air humidity.

The better for me is the seedlind in a hermetic plastic  box with a transparent lid.

[Justin Jardinier]

The soaking 24 at 48 hours in water can help thoses seeds to germinated more easily.

Diluted bleach works very well for the Galapagos species. I also wonder about letting them rot - some fruits I have seen fall victim to fruit flies, and eventually smell like ammonia. I wonder if that might have a similar effect to bleach, though I have not run tests.

[William Schlegel]

Current weather at Guam international Airport is 78 degrees F and 85% humidity. Daytime highs and nighttime lows aren't that different this week on weather.gov. Expected high today of 84 and low of 75 F.

Is the high humidity part of this heat problem? Here in my garden tomato plants widely handle the hottest days we get around 100 F. Lows are always much lower than the highs. We are a little less extreme than Joseph here. Typical summer day here has a little cooler of a day and a little warmer of a night but still very similar. It's basically the same climate a days drive north.

[Alex]

In italy,farmers expand a shadow veil who protected of the too strongs sunshines rays of the some fields. It seem not very expensive and efficient.
https://www.ilgiardinocommestibile.it/suggerimenti/lombreggiatura-come-proteggere-il-giardino-dal-sole-reti-ombreggianti-e-altre-soluzioni/

I am using a similar method.

Here in my garden tomato plants widely handle the hottest days we get around 100 F

Are your frogs, snails, or worms drying up? We have their corpses everywhere on hot days. There may be no rain for weeks, and if it rains, the moisture will instantly evaporate in 5-10 minutes.
Humidity is better tolerated by plants than heat. On hot days I irrigate.
It's not just tomatoes that burn. Bell peppers suffer greatly.
Tomatoes are not able to survive: Arcanum group (S.neorickii, S.arcanum, S.chmielewskii); S.peruvianum, S.pennellii are between life and death; non-heat resistant S.lycopersicum. But this could also be due to the fact that they previously grew up in Poland.