Storage and handling characteristics of trinexapac-ethyl treated Kentucky bluegrass sod

Internal heating during sod storage can lead to plant deterioration and is a limiting factor in sod transportation. Storage practices such as the use of refrigeration and vacuum packaging have increased storage time; however, these are usually not practical or economical. Experiments were conducted to develop a feasible growth regulator management technique, using trinexap ac-ethyl, to increase the storage life of Kentucky bluegrass (Poa pratensis L.) sod. Experimental setup for all experiments was a completely randomize d design with a 2 (trinexapac-ethyl vs. control) x 3 (storage times) factor ial treatment arrangement with 3 replications. Trinexapac-ethyl was applied at 0.23 kg(.)ha(-l) to Kentucky bluegrass 2 weeks prior to harvesting. Res ults showed that sod treated with trinexapac-ethyl was as much as 10 degree sC cooler than the controls in the center of the sod stacks after 48 hours of storage. The reduced sod temperatures led to a 30 % greater tensile stre ngth and 17% better quality ratings in treated sod after 24 hours of storag e. A preharvest application of trinexapac-ethyl appears to increase storage times of Kentucky bluegrass sod, which may improves od market quality. Che mical name used: [4(cyclopropyl-alpha -hydroxy-methylene)-3,5-dioxocyclohex anecarboxylic acid ethyl ester] (trinexapac-ethyl).