This experiment was carried out to clarify the effect of light qualities on the growth characteristics and yield of fruiting body in the cultivation of Lyopyllum ulmarium. The intensity of illumination by type of light was in the order of white light(2,270Lux), yellow light(1,750Lux), blue light(460Lux) and red light(400Lux). An investigation of fruiting body showed these results that the pileus size and stipe diameter of fruiting body on CBM (Chungbuk mushroom)-1757 were much larger than Hypsizigus marmoreus, and an effect of yellow light seemed to be better than those of another light. In comparison with Hypsizigus marmoreus, the growth duration of CBM-1757 was shortened by 8 days which included 2 days for fungi culture, 1 day for first pinning requirement and 1 day for growth. The growth duration in yellow light illumination was about 70 days showing the tendency of 2~4 days reduction. There were no differences in results such as number of effective stem and fresh weight. The yield of fruiting body per bottle in CBM-1757(95.6g) was little higher than Hypsizigus marmoreus(94.8g). By a white light’s standard, the yields of blue and red light illumination were decreased by 2~9%, but that of yellow light illumination was increased by 8%. The chromaticity results showed that brightness, red and yellow coloration of CBM-1757 were higher than those of Hypsizigus marmoreus, and yellow light treatment was more effective than another light.

When we consider that most Flammulina velutipes are foreign varieties, and the international disputes of genetic resources increase, the development and distribution of domestic varieties are very important. Flammulina velutipes, which belongs to the Basidiomycot, have abundant vitamins, and is one of popular mushrooms. 6 varieties of Flammulina velutipes were collected, the selection of desirable isolates and characterization were conducted after monosporous isolation and breeding. After isolation of 1,200 monospores from 6 varieties, the final 10 monospores from each isolate were selected, and 250 isolates were obtained in 15 breeding combinations. Through an investigation of fruiting body, 29 lines were selected at first, then 6 lines at secondary step, and the last 3 lines. The biological characteristics was that mycelia growth was 0.6~2.0cm below 15 ℃, and 2.3~3.8cm at 20~25℃ showing the best result, on the other hand, 1.1~2.4cm at 30℃. There were no differences in pH, but the mycelia density of E-2-8 line seemed to be lower. Mycelia growth and density in some kinds of media such as MCM and MEM were most favorable, but worst in Wa medium. In D-1-10 and C-3-5 of selection lines, yield of fruiting body per bottle(850cc) was 120∼125g, number of effective stem was 299, and stipe length was 93∼95mm showing the best growth.

The purpose of this study was to select and to recommend the optimum rice with the newly developed varieties at 11 agricultural technology service center(ATSC) in ChungBuk province. The newly bred 18 varieties were evaluated rice yields and quality, including rice taste at each districts from 2007 to 2009. In the overall consideration, Hopum-byeo was selected as the best rice variety in Chungju, Jincheon districts, and Samkwang-byeo was choosed as the best variety in Cheongju, Eumseong, Okcheon, and Yeongdong based on the yields of rice and mechanic rice tastes. Hopum-byeo and Samkwang-byeo was recommended in Cheongwon, Goesan, and Boeun districts. Unkwang-byeo was selected as optimum variety in Jecheon, and Danyang districts.

Bakanae disease, a typical seed-borne disease of rice, caused by Gibberella fujikuroi which affected rice quality and yields seriously throughout the country. The disease could be transmitted to other healthy plants in heading dates, and the environment-friendly agricultural practices could be one of the reasons for the outbreak of disease because of the chemical-free agriculture. Studies were conducted to investigate the effects of instrument devised to protect the bakanae disease. The newly developed device consists of aquarium heater and oxygen generator. The temperature of water remained stable as 32.6±0.9℃, and it was effectively applied to sterile seeds for high quality seedlings. In the field tests of infected seeds with bakanae disease, the ripened grain ratio decreased in the 30% infected seeds, and the yields of polished rice dropped as 28%. The secondary infection of bakanae disease was effectively prevented with 500 fold fludioxonil treatments just prior to the planting in the field.