The water flea has been used as a test organism of toxicity test for surface water. Toxicity test with water flea is categorized into two parts. One is acute toxicity test with observing immobility and mortality and the other is chronic toxicity test determined by survival and reproduction of water flea. Heartbeat measurement of water flea was designed as a short-term toxicity test in this study. Direct measurement of heartbeat under microscope by aid of video camera gives and early diagnosis of mortality in short time. Therefore, the effects of measuring illumination, measuring time, and non-feeding during the test on heartbeat of water flea was evaluated to establish a new test approach. Test organisms used in this study are Daphnia magna, a well standardizes toxicity test organism, and Simocephalus mixtus, a newly refined organism. IC50 values of these test organism by heartbeat measurement were compared and discussed. It was found that toxicity test by heartbeat measurement was a reproducible, easy and simple method accomplished in a few hours.

A new light green seed coat Azuki bean cultivar, "Yeonkeum" was developed at the National Institute of Crop Science(NICS) and the Yeongnam Agricultural Research Institute (YARI) in 2005. Yeonkeum was selected from the cross between Jaja-sodun and "IT12099

2002. A cross was made betwen Lilium formolongi “Raizan”, a trumpet shaped and white petaled lily variety, and Lilium Asiatichybrid “A95-14”, a red colored variety. The flower characteristics and performance of “Eunbi” were investigated from 2000 tounder

A new Asiatic lily “Maro” was released by the National Horticultural Research Institute (NHRI), in 2002. A cross wascharacteristics and performance of “Maro” were examined from 2000 to 2002. “Maro” flowers in middle of June, but can floweryear-round by st

A new FA interspecific hybrid lily “Goyo” was released by the National Horticultural Research Institute (NHRI) in2002. A cros was made betwen Lilium formolongi “Eunha”, a trumpet shaped and white petaled lily variety, and Lilium Asiatic“Goyo” flowers in e

A new spray chrysanthemum (Dendranthema grandiflorum) cultivar Peak was bred by crossing between GrandPink and Relance. Its growth and flower characteristics were investigated from 2002 to 2004 by shading culture in summer andretarding culture in spring.

made between Asiatic lily Byeong Ga, a spotted and orange colored variety, and Connecticut King, an unspotted yellow vari-ety. The flower characteristics and performance of Bomi were examined from 2000 to 2002. Bomi flowers in middle of June,offlower is 1