Simply throwing them in the wash should suffice, but if you want to be extra sure the fungus dies, you could soak your socks in a 1 part bleach to 10 parts water mixture for ten minutes.
Keep in mind that it's not your socks you need to worry about so much as your shoes, they're a little more difficult to clean.
Try changing your insoles out, they make special ones which help prevent athletes foot.
outdoors.stackexchange.com/users/4148/ShemSeger
Hot Water - needs to be very hot
- 140 F (60C) - reported to kill all, but is not good for wool.
UV Light - hang out to dry in direct sunshine.
Products exist that claim to sterilize shoes using UV light and can be used for socks.
Chemicals
- Anti fungal Laundry rinse (e.g. Canestan) is effective, Borax etc.
Bleach alone does not kill fungus spores.
Your shoes and feet need treatment as much as your socks.
outdoors.stackexchange.com/users/None/
(Late answer here.)
A scholarly report discusses fungus and laundry
Several years ago, a scholarly report was published.
The report's "Appendix A" discusses, among other things, how you should do laundry if someone in the home has a fungal infection.
The advice given
The report advises: Whenever you do laundry, add some activated oxygen bleach (AOB) .
Notes:
You can use standalone AOB, or a detergent with AOB included.
This is available in most supermarkets, but you have to know what to look for.
See this link .
If possible, also do laundry at 140 °F (60 °C) .
Note:
This may shrink and/or destroy certain items.
(Source.)
Read their care labels.
Use the regular cycle .
Don't enable "quick wash", "water saving", or any other environmentally-friendly options.
Make sure each item goes through the rinse and spin cycles at least twice .
Preferably three times.
It's best to wash items belonging to the infected family member in separate loads from everyone else's laundry.
If you can also dry the items in sunlight , this is an extra bonus.
Water temperature
In some countries (including the US and certain others), if you want to wash clothing at 140 °F (60 °C), there's a problem.
An article on the Bottom Line Inc. website states that, in these countries, household water heaters typically are set to 120 °F [50 °C] to minimize the risk of scalding.
The article suggests three possible workarounds.
One
( dangerous ) workaround would be to raise your water heater's temperature to 140 °F (60 °C).
But this is a dangerously-high setting.
(Source.)
It may also be illegal in your jurisdiction.
(Source.)
Water at 120 °F (50 °C) takes 5-10 minutes to cause a third-degree burn; but water at 140 °F (60 °C) takes just 3-5 seconds. (Source.)
Third-degree burns sometimes kill people.
(Source.)
Maybe I should email the Bottom Line Inc. and suggest that they revise their article.
Another workaround might be to pour a kettleful of boiling water into your top-loading washer shortly before it's finished filling.
A third workaround is to use a washing machine with a water-temperature-boosting feature , "such as the Whirlpool Front-Load Washer with Deep-Clean Steam, model #WFW86HEBW, which can get the water up to 150 °F [65 °C]".
outdoors.stackexchange.com/users/12817/tealhill supports Monica
Going along the "homebrew supply" route, peracetic acid AKA PAA/peroxyacetic acid is a reasonably safe and very effective sanitizer.
It's used in hospitals and by veterinarians, as well as in the brewing industry.
I've splashed it on myself and my partly wool socks (and shoes)
enough times that I'm confident it won't hurt your socks.
Use suggestions: Dilute 1:200. Don't get the undiluted stuff on your skin or in your eyes!
Don't try to smell it!
(I've been there and done that.)
Diluted, it is still a bit of a skin irritant, so rinse immediately.
Even diluted it will react with metals, except for stainless steel.
Recommended exposure time is usually 10 minutes, but I'd probably use it longer on cloth.
outdoors.stackexchange.com/users/4310/Pepi
Chlorine Bleach is not good for wool.
Found a solution that worked for me - phenolic disinfectant (Lysol) the web site also suggested Pine Oil (Pine Sol or Lysol Pine Action) http://laundry.about.com/od/handwashing/fl/How-to-Wash-Wool-Socks.htm
Remember to also disinfect towels, shower shoes/sandals, etc as the athlete's foot fungus can spread via laundry basket contact (or gym bag / backpack)
http://laundry.about.com/od/laundrybasics/a/athletesfootlaundry.htm also (same address as prior ending with) /disinfectlaundr.htmBest
of luck
outdoors.stackexchange.com/users/9285/Charles
I have dealt with this myself.
I use wool socks almost exclusively and sometimes a tech liner underneath.
Cheap White Vinegar.
Buy by the gallon and keep on hand and foot.
Use undiluted or 50/50 lowest. 10% bleach solution is what I use INSIDE my shoes and fan dry thoroughly at least once a season for any shoes I sweat in.
Good luck.
Foot AIDS sucks.
outdoors.stackexchange.com/users/8624/bob
Rubbing alchohol is also an effective disinfectant.
However, the problem is more general:
Wearing socks inside foot boxes on a day in, day out basis is the root.
Recommendations to prevent a recurrence: Go barefoot more of the time.
When you do get an infection, rub your feet with rubbing alcohol at the end of the day.
Do not sleep in socks.
If the weather is cold enough, keep separate day socks and sleeping socks.
On canoe trips I wear 'reef boots' (footwear with rubber soles and neoprene sides) on several week trips.
During the day my feet were constantly wet.
Once in camp, I changed to dry socks and lightweight runners or sandals.
No problems.
outdoors.stackexchange.com/users/2157/Sherwood Botsford
I have found that using a mixture of a cap full of bleach with the detergent and adding a cup of pine sol helps.
As well as turning your water heater up a small amount.
I would also highly recommend using anti fungal powder in between your toes after showering and throughout the day as needed, as a preventative.
outdoors.stackexchange.com/users/19474/Ryan
I've got athlete's foot after having my feet in the same boots for extended periods of time.   How can I disinfect my wool hiking socks to prevent this from spreading and reinfecting my feet?
How do I disinfect my wool hiking socks?
outdoors.stackexchange.com
<clothing><hygiene><cleaning><socks>
outdoors.stackexchange.com/questions/10538
outdoors.stackexchange.com/users/429/Benzo
Some say bleach alone will not kill fungus spores. others say to soak your socks in a 1 part bleach to 10 parts water mixture for ten minutes. Use anti fungal powder in between your toes as a preventative. Peracetic acid  AKA PAA/peroxyacetic acid is a reasonably safe and very effective sanitizer. Anti fungal Laundry rinse (e.g. Canestan) is effective - Borax etc. Another recommendation is phenolic disinfectant (Lysol). The web site also suggested Pine Oil (Pine Sol or Lysol Pine Action), or rubbing alcohol. UV light or a hot wash are also recommended. Hot water, antifungals, alcohol and disinfectants work well. Bleach can work in combination with other products.
Bleach is not good for wool and doesn't kill spores, but can be used with other products. Antifungals, peracetic acid, disinfectants and rubbing alcohol work well. Hot water can be effective.