Abstract
Dry heat is effective for sterilization of plant seeds against some seed-borne pathogens, and this approach has been used commercially by seed companies in Japan against Cucumber green mottle mosaic virus and Kyuri green mottle mosaic virus in seeds of cucurbit crops. Ovens used for seed sterilization by seed companies have different mechanisms. We measured temperature of 20-30 points in each of the four ovens used for seed sterilization. The temperature measured in each oven showed different patterns. An oven, in which lattices contact to seeds in shelves aspirated air, was the best among the three large types for temperature control and speed for the rise. Another small one, which is often used for research and other purposes, was also good for temperature control.
