본 연구는 시설토마토 재배지에서 push-pull 전략을 이용해 담배가루이와 천적곤충의 행동을 제어함으로써 담배가루이(Bemisia tabaci)를 친환경적으로 방제하기 위한 기술을 개발하고자 수행하였다. 담배가루이는 노란색에 유인율이 가장 높았으며, 520 nm의 광원에는 유인반응을 복합광원인 450 + 660 nm의 광원에는 회피반응을 보였다. 천적곤충인 담배장님노린재(Cyrtopeltis tenuis)와 미끌애꽃노린재(Orius laevigatus)는 모두 520 nm의 광원에 가장 높은 유인반응을 보였다. 휘발성 물질로는 ocimene과 carvacrol에 대해 기피반응을, methyl isonicotinate에는 유인반응을 보였다. 토마토 온실에 메밀을 투입하였을 경우 천적곤충인 담배장님노린재의 밀도는 무처리 대비 15일간 약 16배로 높게 유지되었다. Push-pull 세부전략들을 종합 처리한 결과, 처리 50일 경과 후 담배가루이의 트랩당 밀도는 무처리 대비 3배 이상 낮게 나타났으며, 이에 따른 시기 별 방제효과는 시간이 경과함에 따라 증가하는 경향을 보인 가운데 최고 68.7%였다.

The widespread emergence of antimicrobial-resistant E. coli is now being seen in humans and animals, and there is an increasing prevalence of multidrug-resistant (MDR) E. coli on a global. In this study, 31 MDR E. coli isolates recovered from pork meat at retail markets were analyzed to determine the phenotypic and genetic characteristics. The resistance to ampicillin (30 isolates, 96.8%) and tetracycline (28 isolates, 90.3%) were the most frequent among the MDR E. coli isolates. Thirty (96.8%) of MDE E. coli isolates harbored the ß-lactamase–encoding gene blaTEM. Twenty-six (83.9%) isolates harbored a class 1 integron, and 30 (96.8%) isolates carried from 2 to 6 resistance genes. Frep (45.2%) and FIB (22.6%) replicons were most common on the replicon typing. This study suggests that monitoring of the antimicrobial resistance of the pathogens found in pork meat should be continued in the future due to concerns about food safety issues.

Bamboo forests are fast-growing, renewable resources, and their carbon sequestration potential has attracted increasing attention. Although bamboo can be used for many purposes, bamboo forests in Korea represent a generally underutilized resource. The main objective here was to perform an assessment of the physical and mechanical characteristics of different species of bamboo found in Korea. The main species of domestic bamboo are Phyllostachys bambusoides, P. pubescens, and P. nigra; we measured the air-dried density for each of the species, with obtained values of 0.89 g/cm2, 0.79 g/cm2, and 0.83 g/cm2, respectively, giving the density order of P. bambusoides > P. pubescens > P. nigra, with P. bambusoides having the highest density. We then measured the compressive strength of each species, which were 802.84 kgf/cm2, 624.69 kgf/cm2, and 743.77 kgf/cm2, respectively, in the order of P. bambusoides > P. pubescens > P. nigra, with P. bambusoides having the highest compressive strength. Volume and maximum load decreased with increasing node height in the three bamboo species, whereas air-dried density and compressive strength increased. Our results thus add to the pool of essential knowledge about Korean bamboo species, and consequently to the development of a potentially valuable domestic resource in Korea.

This study was conducted to evaluate the efficacy of mulberry leaf mixed diet on larval growth of Protaetia brevitarsis. As a result of adding mulberry leaves to oak fermented sawdust, the survival rate of P. brevitarsis larvae were higher than those of the control when mass rearing larvae. When fed oak fermented sawdust with 5%, 10% and 20% of mulberry leaves, the cumulative proportion of larvae over 2.5g was 93.1% at 65 days, 95.6% at 55 days, and 93.9% at 55 days after rearing at 25±1℃, respectively. Also, heavy metals were not detected in larvae of P. brevitarsis fed on mulberry leaves.

This study was conducted to evaluate the efficacy of mulberry cake mixed diet on larval growth of Protaetia brevitarsis. As a result of adding mulberry cake to oak fermented sawdust and mulberry fermented sawdust, the survival rate of P. brevitarsis larvae were higher than those of the control when mass rearing larvae. When fed oak fermented sawdust with 3, 5% and 10% of mulberry cake, the cumulative proportion of larvae over 2.5g was 92.9% at 65 days, 90.8% at 55 days, and 96.3% at 45 days after rearing at 25±1℃, respectively. When fed mulberry fermented sawdust with 3%, 5% and 10% of mulberry cake, the cumulative proportion of larvae over 2.5g was 86.2% at 85 days, 90.7% at 75 days, and 91.5% at 75 days after rearing at 25±1℃, respectively.

낭충봉아부패병에 저항성인 신품종 토종벌을 농업과학원에서 시험재료로 제공받아 일반 농가에서 사육중인 일반벌과 비교하였다. 꿀벌 수밀력을 조사한 결과 일벌 개체당 수밀력은 비저항성 계통보다 저항성계통이 15% 높았으며, 화분채집량은 저항성계통에서는 358mg, 비저항성 계통은 330.3mg으로 저항성계통이 비저항성계통보다 8.4%의 높은 화분채집력을 보였다. 질병저항성을 알아보기 위해 봉개유충 청소행동 평가에서 8시간 후 저항성계통에 서는 51.3%, 비저항성계통에서는 50.7%이었으며, 24시간 후에는 두계통 모두 98.7~100%의 사충 제거율을 보였다. 봉군발육조사에서는 저항성 계통의 경우, 일벌, 유충, 번데기의 수가 비저항성계통에 비하여 41%, 7%, 73% 로 발육이 우수하였다.