My dad would allways put one tablespoon of sugar in tomato hole and then plant tomato on top. It seems to work. I'm wondering how ?

Do you have nematodes?

The reason the sugar worked for your Dad is that he either didn't have nematodes in the first place or was planting varieties that are resistant to nematode infection.

Read this. Good info on all sorts of problems. They cover nematodes at the bottom of the article.

http://plantdiseasehandbook.ta...

Thanks. Daisy !
I'll check it out. Sounds interesting !
Your from valley ?
Arnt you ???
I believe, the hole valley has nematodes.
Anyhows ! Dont anybody put out the old time, home recipes that your elders told you !!! CAUSE ... There TRUE !!!
Sugar for nematodes ! Does work !
I researched it.
Sugar, feeds the beneficial microorganisms, increasing, organic matter, that is hostile to the nematodes !!!
How about that ? Cool

Also ! Molasses for weed killer.

Check them out at.
homeguides.sfgate.com
How to use sugar in garden ?
I was also learned to, using Epsom salt for insect control/killer !
Whaa???
😎😎😎

So here's a question for you Philip Why do sugar beet and sugar cane plants get attacked by nematodes?

On the other hand, there's this:
Birch, A. N. E., et al. "DMDP-a plant-derived sugar analogue with systemic activity against plant parasitic nematodes." Nematologica 39.1 (1993): 521-535.

https://www.researchgate.net/p...

@sooby hi Sue 😁
To answer your question. I can't.
I just can guess theres diferent kinds of nematodes.
Site you sent me was kind of Greek to me. Tech names and all. Mentioned different nematodes. With my phone, i cant download much.
Did you look at site i mentioned, a couple pages back ?
😎😎😎

I read it for you Phillip. Here's what it says:

A naturally occuring plant sugar extracted from certain plants kills nemotodes. What it doesn't say is that this is the same plant used to produce Rotenone, one of the deadliest non-discriminate pesticides ever invented.

I'm not surprised it kills nemotodes. I wonder if you could eat any food produced by a crop treated with it.

I think all plant-based pesticides are some form of "sugar". And I'm not talking about table sugar.

@daisyl ! What ???
I read about : useing sugar in garden.
Sugar like we use in our food.

Are you saying that table sugar breaks down in soil, into rotenone?

No. Table sugar is a plant sugar made from sugar cane or sugar beets.

Rotenone is an derivative of two tropical Legume genera.

Some plant sugars are harmless and make food taste sweet but others will kill you. The ones that make your food sweet will not kill bugs and will only break down into carbon, oxygen and hydrogen.

The plant sugars that will kill you won't break down into table sugar or anything close to it.