The moth species and bugs are highly polyphagous that feed on a wide range of field and vegetables crops, including soybean in Korea. The monitoring study was conducted in soybean fields in Southern area Miryang from 2021-2023. Commercial funnel and rocket traps housing species-specific baiting with pheromone were used for monitoring of moth species (Spodoptera frugiperda, Spodoptera litura, Agrotis ipsilon, Helicoverpa armigera, Ostrinia furncalis, Spodoptera exigua, and Mythimna separata) and bean bugs (Riptortus pedestris), respectively. The higher number of Spodoptera species (S. litura and S. exigua) were captured in August to September with several seasonal population peaks. The higher number of R. pedestris was captured in July to September. Climatic components were found as critical and influential factors in the population dynamics of moth species and bean bug. The population information of this study can be used to understand the spring emergence along with number of generations, and integrated into management programs of moths and bugs.
Spodoptera species (S. exigua and S. litura) are important pests of several crops and vegetables in Korea. We investigated development processes of Spodoptera species under constant temperatures (20, 25 and 30 oC) regimes and relative humidity (RH) (30-35, 50-55, 70-75, and 90-95%) conditions. We collected eggs of Spodoptera species by releasing them into a rectangular box inner walls covered with a sheet of white paper. Temperature and RH significantly impacted on oviposition, immature survival, adult emergence and longevity of Spodoptera species. Maximum number of eggs, shorter developmental time, higher adult emergence with longer longevity were reported in 70-75% at 30 oC. Minimal eggs and larval survival were recorded in 30-35% and 90-95% RH, respectively. This results suggest that temperature and RH had individual apparent effect on the developmental processes of Spodoptera species instead interactive effect. Therefore, there is chance to cause a significant damage to field crops and vegetables in 70-75% at 30 oC.
The fruit stalk of Hovenia dulcis (H.dulcis) is traditionally used to relieve hangovers in Korea. Theracurmin is a highly absorbable curcumin preparation which increases the bioavailability of curcumin. Curcumin is known for its antioxidant and anti-inflammatory effects. However, the role of this combination in lowering alcohol levels in the body, thereby alleviating the severity of alcohol-induced hangover has not been investigated. Therefore, we conducted a study to investigate the eliminatory effects of a health drink containing the extract of the H. dulcis fruit stalk and theracurmin (theracurmin drink) on ethanol-induced hangover in rats. The theracurmin drink delivered orally to rats 30 mins before the administration of 40% ethanol (5 g/kg body weight), lowered the concentration of ethanol and acetaldehyde in the blood samples collected 1, 3, and 5 h after ethanol administration. Furthermore, the theracurmin drink increased the activities of alcohol dehydrogenase and aldehyde dehydrogenase enzymes. The effectiveness of the theracurmin drink was thus superior to that of other health drink products, suggesting that its consumption may alleviate or prevent an alcohol-induced hangover.
애긴노린재류(Nysius species)는 세계에 널리 퍼져 있는 해충으로 기주범위는 매우 넓으며 특히 국화과의 주요해충으 로 알려져 있다. 최근 종실 들깨에서 피해가 보고되고 있으며, 들깨를 수확할 때 종실과 같이 다량의 애긴노린재류가 함께 혼입되어 그 발생밀도가 매우 높음을 알 수 있다. 본 연구에서는 이러한 애긴노린재류가 들깨에 미치는 영향을 연구하고자 들깨 종실의 무게변화와 발아율을 조사하였다. 건전한 들깨(들샘) 종실에 애긴노린재류 성충 0, 5, 10, 15, 20, 25마리를 인위적으로 접종하여 3일과 5일 후 들깨 무게를 측정하였다. 측정결과 접종한 노린재 밀도가 5, 10, 15, 20, 25마리로 높아질수록 0마리일 때 보다 들깨 무게가 3일 접종 시에는 각각 2.6, 5.5, 9.0, 10.5, 11.0% 감소하였고, 5일 접종 시에는 각각 2.9, 9.9, 12.0, 17.6, 18.1% 감소하였다. 애긴노린재의 밀도가 높아질수록 종실의 무게가 감소폭은 컸으며, 3일 접종 때보다 5일 접종 때가 들깨의 무게는 더욱 많이 감소하였다. 또한 들깨무게가 감소함에 따라 발아율도 함께 떨어졌다. 노린재 흡즙에 의한 피해로 들깨 종실의 무게가 감소하였다는 것을 추정할 수 있으며, 이로 인해 들깨의 발아율이 떨어진 것으로 생각된다.