Not fusarium.
Without a diary and/or a lot more info about what you have or have not being doing, it is very hard to give meaningful advice based on 2 random pictures.
Could be a massive spider mite problem, but not really seeing evidence of insects in these pictures, apart from the "spotty" leavrs in pic 2.
Could also be burning due to a salt build up in the soil mix...........but without a diary...........