Some of the posters here told me I have a thrip in my tomato blooms. Maybe this is what has made your production lower. I think some varieties are more affected by it than others. I would never have discovered it if I hadn't been using an electric toothbrush to vibrate the blooms for pollination. Hold something black under the bloom while vibrating it. If 1 or more very small bugs falls out of the bloom, you may have thrips. One guy said it may just be the kind that eats pollen, which would not be a major threat to the plant, but is very bad for bees. Check it out, if you have them spray once and then again in a week. Google thrips for more information. Thrips can also carry disease.
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