BadBoy7:
For tomato try a table spoon of baking soda a teaspoon of mild dish water soap and a couple of table spoons of olive oil in about 5 lites of water ..put it in a spray bottle and use twice a day for the first week.

Don't know about pepper plants

Check the dish water soap as most are a petroleum derivatives or at least biogradable

<>Crosseyed Mary: they are awful to eradicate! Best to cut them to ground level which is tedious. Weed killers will do it but they are resistant. I had five that I cut to the ground, then tried herbicides. They started to return so on advice from a friend I poured petrol on them, let it soak in, lit it then to make sure a few days later poured more petrol on them but didn't light it. That worked. The white parts covering your plants are the seeds too. Best of luck !Crosseyed Mary: they are awful to eradicate! Best to cut them to ground level which is tedious. Weed killers will do it but they are resistant. I had five that I cut to the ground, then tried herbicides. They started to return so on advice from a friend I poured petrol on them, let it soak in, lit it then to make sure a few days later poured more petrol on them but didn't light it. That worked. The white parts covering your plants are the seeds too. Best of luck !