• Journal of Bio-Environment Control
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• v.13 no.3
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• pp.178-184
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• 2004

This study carried out to develope the vision system which automatically finds out a optimum transferring period of plants (Perilla, Platycodon grandifloums and Lactuca sativa) by using image process-ing. This system mearsured a height, long diameter and short diameter of the three plants with 20 replications. Following results were obtained on each plant. Compared with real data to be measured by hand with the vernier calipers, height, long diameter and short diameter of Perilla showed 0.5 mm average error rate with 1.7%, 4.7 mm average error rate with 3.9% and 5.5 mm average error rate with 6.9% respectively. Those of Platycodon grandifloums showed 2.4 mm with 8.1%, 3.4 mm with 7.2% and 4.0 mm with 10.4% respectively. Those of Lactuca sativa showed 4.0 mm with 9.1 %,3.4 mm with 7.2% and 3.6 mm with 9.4% respectively. The system could be used to transfer accurately the plant seedling, if the system were improved enough to reduce error rate for the optimum transferring period of a plant in the greenhouse.

• Journal of Mushroom
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• v.2 no.2
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• pp.60-68
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• 2004

Potato dextrose broth was the best inoculation medium to produce in vitro synnemata of Paecilomyces tenuipes. The optimum temperature for synnemata formation of P. tenuipes was $20^{\circ}C$ under 500 lx of light intensity. Highest synnemata production was observed at 18 hr of light period per day. The medium containing 50 g of each silkworm pupae and brown rice produced highest number of synnemata. The optimum ratio of brown rice to distilled water was found as 1:1. Mycelial growth and synnemata production of P. tenuipes was faster and higher in medium containing grinded pupae as compared to whole pupae. The optimum inoculum amount per bottle of medium was 15ml. The highest synnemata production of P. tenuipes was obtained by incubating rice pupae medium at $24^{\circ}C$ until mycelium grows sufficiently after inoculation and then transferring it to $20^{\circ}C$ chamber till harvest.