Bio-efficacies of two different types of fungicides, Diniconazole and Paclobutrazol with their effects as plant g rowth regulators f or Kimchi Cab bage were e valuated o n February 4 to A pril 13, 2024 in Los Baños, Laguna, Philippines. The experiment was done during the off-season planting of Kimchi Cabbage in the country. Yield and other horticultural characteristics were observed for seven different groups: group 1, untreated control; group 2, recommended rate of granular fertilizer (RR-G); group 3, recommended rate of granular fertilizer plus recommended rate of Diniconazole; group 4, recommended r ate of D iniconazole (alone); g roup 5 , recommended rate o f Paclob utrazol (RR-PBZ), group 6, RR-G plus RR-PBZ; and group 7, RR-G plus ½ RR-PBZ. Results showed that combination of recommended rate of granular fertilizer plus the full recommendation of Paclobutrazol (group 6) resulted in a significantly higher yield of 64.9 tons/ha than other groups with yields ranging from 23.3 to 55.3 tons/ha. Such significantly higher yield in group 6 was also attributed to the number of leaves produced by plants at the time of harvest. Regarding effects of two chemical treatments, the combination of Diniconazole a nd P aclob utrazol a s recommended granular f ertilizers h elped in t he heading of K imchi Cabbage during hot conditions with an average temperature of 32-35°C from March to April at the heading stage plus a f actor of b eing planted a t a lowland area i n the country. T he a dvantage o f Paclobutrazol aside from yield is its availability in the country as compared to Diniconazole (Binnari).

배추의 뿌리혹병 저항성 품종 개발 및 관련 연구에 활용할 수 있는 자원 탐색을 목적으로 세계채소센터(World Vegetable Center, 대만 소재)와 아시아 지역 5개국에서 도입한 120 유전자원을 대상으로 전라남도 해남군 배추 재배포장에서 발병한 뿌리혹병균(레이스 2)을 접종하여 저항성 반응을 조사함 1. 발병정도가 1 이하로 저항성 반응을 보인 자원은 IT100384와 IT305623로 2개이고, 발병정도가 1 초과 2 미만으로 중도 저항성 반응을 보인 자원은 IT100385, 100439, 135407로 3개임. 그 외 자원은 발병정도가 2 이상으로 감수성 반응을 보임 2. 저항성 반응을 보인 IT100384는 발병정도는 0.3으로 거의 증상을 보이지 않았으며, IT305623은 발병한 식물체가 발견되지 않아 가장 저항성이 높은 자원으로 나왔음 3. 뿌리혹병균에 대해 감수성 반응을 보인 자원들 중 발병 정도가 4.0으로 병 증상이 아주 심한 자원이 IT100349 등 23개이고, 발병정도가 3.0에서 4.0 미만인 자원이 84개로 가장 많았고, 2.0에서 3.0 미만인 자원은 8개임 4. 본 연구결과 배추 뿌리혹병 발병정도가 낮아 저항성 및 중도 저항성 자원으로 예측되는 5개 자원에 대해서, 병 검정이 유묘 단계에서 이루어졌고 한 개의 균으로 검정하였기 때문에 향후 다양한 균주를 이용하여 재평가함으로 활용가치가 높은 유전자원을 제공할 수 있도록 계속 연구 필요

Brassica rapa subsp. pekinensis (배추) 근권에 서식하는 종속영양세균의 군집 밀도 및 군집수준 생리활성을 2곳의 지역에서 각각 측정하였다. 근권의 종속영양세균군집 평균 밀도는 수원이 2.65×106CFU g-1 soil, 예산이 3.75×106CFU g-1 soil로 나타났고, 토양은 수원이 2.45×106CFU g-1 soil, 예산이 2.97×106

Chinese cabbage grown during autumn season is confronted with drought conditions for a certain period, especially during the early growth stage. In this study, we investigated the effects of drought stress on plant growth characteristics, as well as free amino acid, carotenoid, and proline in Chinese cabbage. Chinese cabbage seeds (Bulam Plus) were germinated, and all the seedlings were transplanted into plastic containers (28 ㎝ diameter × 22 ㎝ high) containing a commercial growth medium. The soil water content was measured and maintained at 10% for the drought-stressed plants and at 30% for the control plants, for three weeks. The results revealed that plant growth parameters were lower in the drought-stressed plants than in the control plants. The total free amino acid content tended to decrease in both drought-stressed and control plants with time. The total free amino acid content was found to be lower in the drought-stressed plants than in the control plants and the proline content was unaffected. Moreover, at three weeks after treatment, carotenoid content in drought stressed plants was significantly higher than that in the untreated plants. We believe that our study makes a significant contribution to the literature because the effects of drought stress on plant growth parameters, free amino acid, carotenoids, and proline accumulation in autumn growing cultivar of Chinese cabbage have not been widely studied in Korea, and our study provides valuable information in this regard, as Chinese cabbage is consumed throughout the year in Korea.