Malabar Spinach - Disease and Winter

Hello,

I live in So California. First time growing malabar spinach and it did extremely well when I planted at the end of summer. There is now what looks like some kind of leaf spot growing on majority of leaves.

What is the recommended care at this point? Should I cut down vines? If so how much? Remove all leaves? I receny bought neem oil so can use that if recommended. Also, should I take into the garage until it warms up, if the plant is salvageable?

Lastly will the blackened seeds still be ok to harvest and dry?

Thanks!

Bumping this message so it' gets more views and hopefully someone who has knowledge about this vegetable!

Looks like my MS late season. I'm in north central fl and its already done for the season, but trying to sprout from seeds it dropped now... A few warm days and I got lil plants of it trying to grow...  The black seeds will shrivel an turn grayish and should be viable. I'd pick the black ones an let them dry naturally to save seed. I did first couple years but it went crazy and dropped seed everywhere and I don't save any longer. I never worried about the spots and just cut it back when it got to ugly and it sprang back to life when the days were longer an we got rain.... Mine seemed to go gang busters for a time then fade an get the spots an such.... Cutting it back never hurt it but we've now had some low 30*s temps and that put it to bed. The original plant dies completely with the cold but the seed does just fine.

I was thinking that as it gets cold the tropical plant gets weak and attached by critters/microbes because zone 10 FL or zone 10 CA is not really hot tropical, just marginally tropical.

It sounds like the solution is to just cull it now that it is winter and make a habit of starting a new batch every 90days?