Donna, whiteflies can be a terrible challenge. I disagree that spraying them with water helps to control them. The eggs and nymphs, tucked away under the leaves, are pretty fixed in place. Do you have any horticultural oil on hand? There are some good summer weight products on the market. You could mix a little in a spray bottle and direct the mist to the underside of the leaves. Hort oils are considered acceptable for organic growers. Neem oil is very useful in that it works as an anti-feedant, as a growth regulator for those insects that feed on the plants, and also smothers the eggs and nymphs just like a plain hort oil. If I had a bad WF problem on my tomato, I'd use Neem.

I agree with the previous posters, I had whitefly problems, the cold should stunt the flies but the larval stage will hatch within a few days so unless it stays relatively cold for a while the larval stage will hatch and them lay eggs and the cycle repeats. But like they said just rinse the leaves and you will be fine. The only biological control that I know of is green lacewings and thrachinid wasps. The lacewings don't eat them but their larval stages will eat them by the truckload, just do a little internet search because I don't know if lacewings survive in cold either. Or as the other poster suggested sharp blast of water on the undersides of the leaves to dislodge them, they are softbodied insects so the blast should kill them, just remember to keep with it because their life cycle is short so everyday a few more can hatch so keep at it. Also, neem works great too

Gem, there is a FAQ for whiteflies, however, I do believe it is of limited use in the treatment of whiteflies. The yellow sticky traps are more of an indicator that you have them instead of a cure. Ants are only there because they are attracted to honeydew that the whitefies are producing. Getting rid of the ants won't solve the problem either as they are only there because of the honeydew. They are not "harvested" like aphids. So what to do... To gain a further understanding of the problem, you have to know why whiteflies are tought to get rid of. Whiteflies have a short life cycle 6-8 days. In this time they live to procreate, they and their larvae suck out the juices out of your plants, and then add the sooty mold (from the honeydew) to further weaken the plants. You have to be persistent with them as no solution is easy. You have several easy non toxic choices. Right now since you have them, I would suggest you use start spraying them off every day, twice a day. You have to do this for at least 2 weeks before you start seeing some results. You could also augment this by using insecticidal soap or a hydrogen peroxide solution (3 parts water to 1 part peroxide + a little dishsoap so it can stick to the leaves better) also on a daily basis. Since the lifecycle of a whitefly is so short--by then they have laid eggs which will have hatched and produced more whiteflies--the cycle goes on. In their larvael stage, they are almost inductructible. You have to get them in their adult stage. By going after them for 2 weeks, you should be able to get rid of 3 generations of whiteflies. Once you notice that the population has decreased, you can use water a couple times a week to control the population. To control the population in the future, underplant plants sensitive to whiteflies like tomatoes, hibiscus, and others with plants that attract beneficial insects. This method is called companion planting (I attached a link). This includes such plants as marigolds, sweet allysum, and dill among others. These plants help attract beneificial insects such as lacewings whose larvae devour whiteflies and other pests by the hundreds. Other plants actually repel certain pests so you don't have to worry about them in the future. I prefer to let nature take care of the pest problem itself. It just takes a little planning beforehand and these problems will be taken care of for you. Beneficial insects and companion planting will do a great job in pest control if you give it a chance. Good Luck and HTH Here is a link that might be useful: Companion Planting

Some type of aphid perhaps? If they are, check out this link I found a couple years ago...it's the most natural way to deal with them and when the aphids are all gone, they'll be gone as well... Here is a link that might be useful: Ladybugs Shipped Direct