No, this product does not come as a liquid. The amount of water used with this product depends on what you are treating for. If you are treating for thrips, you will use 8 oz. of solution in 100 gallons of water. This product is for use in an enclosed greenhouse only. If you are not treating in a greenhouse, I would recommend Adonis 2F Termiticide/Insecticide. This is a liquid and is easier to use. For orchids, you will use .46 to .6 fl oz of solution in nothing less than 2 gallons of water.
Overture 35 WP Insecticide has a shelf life of 3 years if stored in a cool dry place
If you are treating for thrips, you will use 8 oz. (4 x 2 oz packs) of Orthene 35 WP in 100 gallons of water. The product is for commercial greenhouses not for residential use. The smallest amount that could be used would be 1 x 2 oz pack in 25 gallons as there is not a way to breakdown the packs into smaller amounts. Tristar 8.5 or Avid would be better options that can be mixed down in smaller quantities.
To find out the production date for Overture 35 WP Insecticide you would have to contact the manufacturer directly and give them that batch number from the package. Valent can be reached at 800-682-5368