Author Topic: Seed sanitation to avoid introducing pathogens: Phytophthora in Tomato  (Read 42 times)

Ocimum

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To avoid diverting the original topic on blight in tomatoes, but continue the very important topic of disease transmission through seed, here a new topic.


Any suggestions on seed-sanitation counter measures that might be appropriate? For example, would freezing kill spores in/on seeds? Would dehydration?

Each species has it's weak points. Freezing beans against the bean weevil is well known.

About Phytophtora in seeds: I do not know what the weak points of the oospores of the species are.

They survive drying in soil
https://onlinelibrary.wiley.com/doi/full/10.1046/j.1365-3059.2000.00515.x

However, they seem to die if the soil containing them reaches more than 40C. Maybe heating is a solution?
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-3059.1995.tb02719.x
(it does not tell if the soil was dry or wet. Makes a huge difference...)

Lactobacillus may be a way to reduce Phytophthora in tomato seeds
https://www.ijcmas.com/vol-3-1/Jiahui%20Guo,%20et%20al.pdf
I know people who swear about soaking seeds in whey before sowing.