Found the following quote, which might have your interest. Apparently foliar is not the only means of using Jasmonic acid.
"The researchers found that dipping seeds in jasmonic acid would kickstart a plant's natural defenses against pests. Jasmonic acid, which is produced by plant leaves when attacked by insects, is known to help defend plants when it's sprayed on crops. However, spraying the acid tends to reduce plant growth, while dipping seeds in the acid doesn't create that side effect, the researchers said."