본 연구는 친환경 살균자재로 알려져 있는 키틴분해 미생물과 석회보르도액을 ‘신고’ 배나무에 처리하였을 때 검은별무늬병 방제율과 과실품질에 미치는 영향에 대해서 조사하였다.유기농 과원에서 생산된 과일은 관행으로 재배한 과일에 비교해서 유기물과 토양 칼슘과 마그네슘 농도를 증가시켰다. 저농약으로 재배된 관행 과원에서는 상당한 검은별무늬병 발생이 억제되었으나, 친환경 살균제를 이용한 유기농 과원에서는방제효과가 없었다. 관행 재배된 과실은 석세포를 감소시키는영향이 있었지만, 유기농 과실에서는 3%이상의 많은 석세포함량을 보였고, 과실 경도를 증가시켰다. 석회보르도액은 당도와 진한 적색의 과실을 생산했지만, 수확된 과실의 표면에 얼룩이 많이 발생하였다.

Background : Angelica tenuissima Nakai is a major medicinal plant around GyeoungBuk Area. Powdery mildew of Angelica tenuissima Nakai caused a Erysiphe heraclei DC. is a major disease. It was found leaf of Angelica tenuissima after rainy season. There was no agicultural chemical registration on Angelica tenuissima. Ecofriendly control needs Angelica tenuissima for GAP. Methods and Results : The seedlings used for the test were sowed and cultivated in mid-February at Bonghwa herbal crop research institute. The irrigation water was irrigated through a drip irrigation system. Powdery mildew occurred after rainfall lasted more than 2 days at the end of June. The pathogen (Erysiphe heraclei DC.) was identified by observing the diseased plants with an optical microscope. Bordeaux mixture was tested using Gold Bordeaux which was listed in the eco-friendly material list and the magnification was 500 times for the medicinal efficacy test and 250 times for the damage test. For the chemical treatment 40 ㎖ of Bordeaux mixture was added to 20 ℓ of water to prepare 500 times of the solution and the treatment was sufficiently wetted to the plant at about 8:00 am. The first treatment was treated at 7. 5 days, the second treatment at 7. 13 days, the third treatment at 7. 26 days, and the final investigation at 7.26 days. The occurrence of powdery mildew was sufficient to evaluate the treatment effect at 13.0% in untreated control and the control value was low at 33.5% in one treatment but 74.0% in control after 2 treatments showed significant control effect. 89.2% respectively. As a result it is effective to control the powdery mildew of Bordeaux solution at least once every seven days to improve the control effect. Conclusion : Control value of bordeaux mixture was higher than after two times of treatment. Bordeaux mixture treatment of powdery mildew on Angelica tenuissima control 89.2% and it can use a producing ecofriendly agricultural product.

Lime-bordeaux mixture (LBM) has been used instead of pesticides in ginseng field and orchard since the 1960's in Korea. In this experiment, LBM was made with different concentrations and sprayed in the field of ginseng for eco-friendly cultivation. Growth characteristics and disease such as alternaria blight, anthracnose, and gray mold were investigated in 4-5 year old ginseng after spraying LBM. LBM caused a little damage on leaf when it was sprayed at the time of leafing stage, late April and early May. Root weights of five-year-old ginseng were 43.1~51.5 g and 41.2~46.6 g in the plot of mid-April and mid-May treatments, respectively. These growth levels were further reduced as compared with that of the chemicals treatment plot. The rate of diseases in the plot of 6-6 and 8-8 ratio were 0.0~4.8% and 0.0~4.4%, respectively, which was similar with that in the plot of chemical control for alternaria blight and anthracnose. However, LBM had little effect on controling gray mold. It showed lower control effect in the plot of 4-4 ratio than that of chemical control. This result will be expected to be a useful guide that can be used in the field to the farmers of the ginseng.

Lime-bordeaux mixture has been used to prevent diseases in the field of ginseng. The purpose of this study is to investigate the efficacy of lime-bordeaux depending on the concentration and treatment time on major diseases of ginseng such as Alternaria blight and anthracnose, and to evaluate the root growth of ginseng. Lime-bordeaux caused damage on leaf when it was sprayed on ginseng between April and early May. No difference was found in root growth by spraying lime-bordeaux mixture between ratio 4-4 and 8-8 ratio in concentration. Plot of 6-6 raito and 8-8 ratio appeared to be similar efficacy compared to that of practical chemical control. However, the plot of 4-4 ratio showed lower than that of chemical control.

An important factor in the production of organic ginseng is the control of Alternaria blight and anthracnose, which mostly affect the leaves in the summer. We compared the effects of a lime-bordeaux mixture (LBM) and agricultural chemicals on the growth characteristics and ginsenoside content in 4-year-old ginseng plants when they were sprayed at 15-day intervals from mid-June to the end of September. The increases in leaf length, and survive-leaf ratio in plants sprayed with LBM were greater than the increases of the control plants, but less than those of agricultural chemicals treatment. The root weight per plant in the plants sprayed with LBM increased more distinctly than that in the control plants, while it was significantly lower than that in plants sprayed with agricultural chemicals. The root yield in plants sprayed with LBM increased by 21% compared to the root yield in the control plants, but decreased by 7% compared to that in plants sprayed with agricultural chemicals because of the decreases in leaf area and survive-leaf ratio. Spraying of LBM had a significant effect on the ginsenoside contents. The total ginsenoside content was highest in the control plants and lowest in the plants sprayed with agricultural chemicals and total ginsenoside contents was great relative to survive-leaf ratio and root weight.

Bordeaux mixture made with each grade of lime and copper sulfate was tested general property and disease control value. Bordeaux mixture was made by composition of each grade of lime (95%, 80%) with each grade of copper sulfate (98.5%, 95%). Phytotoxicity was evaluated to Bordeaux mixture made with each grade of lime and copper sulfate, and then low grade copper sulfate (95%) was more severely in the grapevine leaf. Bordeaux mixture, made with each grade lime and copper sulfate, were tried to evaluate control effects of downy mildew in field. As a result, Bordeaux mixture (95% of lime and 98.5% of copper sulfate, 6-6) applied 5 times at late in June was showed more effective disease control value than any other trials of Bordeaux mixture. There was no difference in nutrient status of petiole each treatment. But fruit characteristics were shown more slightly improved quality.

It's crucial to control Alternaria blight and Anthracnose emerging mostly on ginseng leaves during the rainy season to increase the organic ginseng products. The purpose of this study is to investigate the efficay of lime-brodeaux spray on the ginseng leaves and evaluate the growth and yield of the ginseng, and the contents of ginsenoside and 70% ethanol extracts from 3-year-old ginseng variety, Cheonpoong. Lime-bordeaux sprayings were conducted in the ratio of 6-6 in June, 8-8 from July to September every 15 days. After June 10, the spraying have no effects on the growth leaf and stem, and there was no significant increase in chlorophyll contents. The ratio of intact leaf and root were distinctly increased because Alternaria blight and Anthracnose were decreased by spraying lime-bordeaux mixture. Root weight per plant and root yield were increased by 15%, and 62% in 3-year old ginseng, respectively, because the ratio of intact leaf and root were higher by using lime-bordeaux mixture. Furthermore, spraying of lime-bordeaux mixture is prone to increase the ratio of rusty root in ginseng. Spraying of lime-bordeaux mixture decreased both of the contents of ginsenoside and 70% ethanol extract by 13.7%, and 15.2% in 3-year-old ginseng, respectively.