PURPOSE: To provide the subject plant growth regulator having a dosage form of a molding such as a raising box composed of a synthetic resin containing the plant growth regulator or a film composed thereof for being laid on the bottom of a raising box, capable of liquating out from the resin and capable of absorption when the roots of a plant grow and come into contact with the above-mentioned molding.
CONSTITUTION: The subject drug having a dosage form of a molding composed of a synthetic resin (e.g. polyolefin, polyamide, polyester, polystyrene or acrylic resin) containing a plant growth regulator [e.g. (E)-1-(4-chlorphenyl)-4,4- dimethyl-2(1,2,4-triazol-1-yl)-pent-1-en-3-ol]. Besides a raising box, etc., e.g. when growth control of a road tree, a fruit tree, etc., is required, a pile is formed using the above-mentioned resin and the pile is struck in the trunk of the tree to keep the effect of the drug for a long period. Application is simplified thereby and there is no problem about damage from the drug even in the case of error of the amount of the drug used. The problems about absorption of the drug on the soil or residual chemicals are also dissolved.
SATO TOMOMI
SHIMIZU KATSUNOSUKE
SEKIMOTO HITOSHI
