Yes, Sevin Dust can be used on tomatoes for various insects. This product is only labeled to be used up to 7 times a year. Wait at least 3 days before harvest.
When applying Sevin Dust, or any other insecticide dust outdoors, you want to have as many dry days in a row as possible to allow the product to work. Once it rains it will wash away the dust as it is not designed to stick to the surfaces outdoors long term.
As long as you are outside the Pre-Harvest Interval window for each plant according to the product label for Sevin Dust, then the food would be safe to eat after washing.
No, Sevin Dust 5% should not be mixed with water. The rate of use for squash is .5 lbs per 1000 sq. ft.
If you are not comfortable using dust, we would recommend Sevin Concentrate. This can be mixed with water and sprayed directly onto the plants.
Yes, Sevin Dust is labeled to be used on beans. You would want to be sure and wash and rinse them throughly before freezing or eating them once used in the growing process. Please refer to the product label for complete application instructions.
Sevin Dust 5% should be applied when target plants or treatment areas are dry. The Sevin Dust 5% label does state that some phytotoxicity may occur on tender foliage in the prescence of rain or high humidity of several days duration following an application.
After applying Sevin Dust 5% to green beans "edible-podded legumes" you need to wait at least 3 days prior to harvesting and consuming.
Per the product label for Sevin Dust, you should apply a thin, even film of dust to plant surfaces. Do not reapply more than once a week. If there is still a heavy dust application after several days, then you may rinse the plants to remove excess dust to prevent phytoxicity or other sensitivity. Be sure to follow the label for pre-harvest intervals and maximum number of applications per year.