Improving Farmers' Pest Management through Media Communication

K. L. Heong 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

Ecological Fitness of Brown Planthopper Nilaparvata lugens and its Predator Cyrtorhinus Lividipenni son Rice Plants with Different Nitrogen Regimes

Zhongxian Lu,K. L Heong,Xiaoping Yu 한국응용곤충학회 2005 한국응용곤충학회 학술대회논문집 Vol.2005 No.05

Life Cycle and Predation Potential of the Black Cricket, Methicoche Vittaticollis(Orthoptera: Gryllidae) and Its Population Density in the Rice Field

Lee, Geon-Hwi,K. L. Heong,Paik, Chae-Hoon,Kim, Doo-Ho,Na, Seung-Yeoung,Park, Man-Young Korean Society of Applied Entomology 2002 Journal of Asia-Pacific Entomology Vol.5 No.2

Life cycle and predation potential of a predatory black crickets, Methioche vittaticollis (Stal), were studied in the laboratory at the conditions of 27$\pm\;1^{\cir}$ and 70$\pm$5% RH with a photoperiod of 14. 10 (L: D). Average life cycle was 90 days. The cylindrical eggs were laid singly within the leaf sheath and hatched in 17 days. Total nymphal period lasted 33 days. There were four nymphal stadia that lasted for 7.2, 7.7, 8.7, and 9.0 days, respectively. Adult male and female lived an average of 35 and 43 days, respectively. The female lay an average of 45 eggs during her life span. The number of striped stemborer (SSB) eggs consumed per day by 1 st, 2nd, 3rd and 4th instar nymphs of M. vittaticollis was 1.7, 2.5, 13.3 and 184.3, respectively, Also, The number of SSB eggs consumed per day by male and female adults were 102.7 and 158.7, respectively. The fourth instar nymph consumed the most number of preys. The functional response curve of 4th instar nymph, male and female adults of M. vittaticollis to the densities of SSB eggs indicated Helling's TYPE B. The consumption of prey by the M. vittaticollis increased with the prey density but the consumption rate decreased. The attack rate of 4th instar of M. vittaticollis was the highest compared to the adults, and handling time was the shortest. Population densities of hoppers and lepidoptera in unsprayed field consisted of rice variety "PSBRC 20" were very low throughout the cropping period. This could be due to the high density of if vittaticollis. M. vittaticollis was collected from the field and bunds, its population inside the field increased as crop matures. Bunds served as refuge for predators when the crop is maturity stage.ity stage.

벼 해충의 분포와 분산의 해석에 있어서 지리정보처리체계의 활용

Y.H. Song,K.L. Heong 한국응용곤충학회 1993 한국응용곤충학회지 Vol.32 No.3

해충의 발생예찰자료의 분석에 있어서 지리자료처리체계의 활용 가능성을 검토하였다. 전국의 152개 병해충 발생예찰소의 해충 발생자료를 이용하여 해충지리적 분포정보를 집적하는 "데이터베이스" 체계를 SPANS(Spatial Analysis Systme)로 구축하였다. 구축된 "지리분포 데이터베이스"로부터 최근 10년간 이화명나방 발생량의 분포변동을 추적한 결과 일반계 품종이 확대 재배되기 시작한 80년대 중반터 고밀도 분포지가 급속히 확산됨을 볼 수 있었다. 또한 분포의 확산과 수축의 중심은 전북의 이리지역임이 확실하게 나타났다. 별멸구의 초기(7월초) 비래량의 분포를 비래후 온도조건과 결부시켜 후기(9월중)의 벼멸구 발생위험지역을 예측하는 시뮬레이션 모형을 구성하였다. 모형에 의해 추정된 벼멸구 발생위험지역을 예측하는 시뮬레이션 모형을 구성하였다. 모형에 의해 추정된 벼멸구 발생지의 분포도를 1990년 9월의 실재 발생분포도와 비교한 결과 경북 청도지역을 제외하고는 분포양상이 매우 유사하였다. 경사도, 고도, 재배작물 등의 분포도를 추정된 벼멸구 발생도와 함께 투시.분류(Overlay/Modeling)하는 기법을 사용한 결과 서남부지역의 벼멸구 국지적 발생위험지를 구분해 낼 수 있었다. The potential of using GIS in analyzing pest surveillance data was explored. The Spatial Analysis System (SPANS) was used to construct a spatial data base to study pest distributions using pest surveillance data collected from 152 stations in South Korea. The annual spatIal distributions of the striped rice borer(SRB), Chdo suppressalis, showed that high densities started to expand in the early 1980s, reaching a peak in 1988. The pattern change appears to be related to cultivation of japonica and indica-japonica hybrid varieties in South Korea. Japo7l!ca varieties have longer duration resulting in the SRB haVlng more time to mature and hibernate in wmter. The locus of SRB spread appears to be located in the mid-west region near lri, Chun~ Buk Province. High brown planthopper (BPH) populations in South Korea are often related to the early immigration and temperature. The simulated distribution of PPH densities in September using these two factors was compared with the actual distribution obtained using 1990 data. The two density maps corresponded closely excepL for differences in the south eastern valley. By overlaying the simulated map layer with the elevation and rice area maps, more specific BPH risk zones could be identified.

온도에 따른 등검은황록장님노린재 (Cyrtorhinus lividipennis Reuter)의 벼멸구 알에 대한 포식습성

송유한,하태기,정대열,K.L. Heong 한국응용곤충학회 1995 한국응용곤충학회지 Vol.34 No.3

멸구류 포식성 천적인 등검은황록장님노린재의 온도에 따른 벼멸구 알 공격능력과 기능반응의 변화를 20, 23, 26, 29, 32, $35^{\circ}C$ 등 6개 온도에서 검정하였다. 등검은 황록장님노린재는 산란된지 1일에서 4일된 이런시기의 벼멸구 알을 선호하였으며, 이중 3일된 벼멸구 알을 가장 선호하였다. 등검은황록장님노린재의 벼멸구 알에 대한 포식능력은 Holling의 제2형 기능반응의 Rogers(1972) 진정포식자 모형에 잘 부합되었다. 기능반응의 포식자 탐색율(a)은 $32^{\circ}C$까지는 온도가 높아짐에 따라 증가하는 경향이었으나 $35^{\circ}C$에서는 급격히 감소하였다. 그러나 처리시간(Th)은 온도가 높아짐에 따라 완만히 감소되었다. 등검은황록장님노린재의 벼멸구 알에 대한 온도별, 밀도별 공격위치의 선호성은 일반적으로 저밀도에서는 큰 차이가 없었으나 고밀도에서는 위쪽에 산란된 알을 더 선호하는 경향이었으며 특히 온도가 높아짐에따라 이러한 경향이 더욱 뚜렷이 나타났다. The functional responses of the female Cyrtorhinus lividipennis on brown planthopper (BPH), Nilaparvata lugens, eggs and their predation behavior were investigated at six temperature conditions; 20, 23, 26, 29, 32, and $35^{\circ}C$. C. lividipennis was found to prefer young BPH eggs, especially 3-day-old eggs the most. The functional responses for female C. lividipennis on BPH eggs fitted the Holling's Type-I true predator-prey Rogers' (1972) model at all temperatures tested except $35^{\circ}C$ at which the negative Th value was produced. With the temperature increased up to 32$^{\circ}C$, the instantaneous attacking rate(a) increased from 0.1923 at $20^{\circ}C$ to 0.5085 at $32^{\circ}C$, while the handling time (Th) was gradually decreased as low as 0.0151 at $32^{\circ}C$. C. lividipenis preferred the BPH eggs laid on the upper part of rice stem when the BPH egg density was high, but there was no significant difference in the preference when the egg density was low. The preference was more obvious in high temperature conditions such as above 29$^{\circ}C$.

고구마 펠릿트 사료의 급여수준이 부로일러의 영양소이용율에 미치는 영향

곽종형,안병홍,한인규 ( Chong Heong Kwack,Beong Hong Ahn,In K . Han ) 한국축산학회 1976 한국축산학회지 Vol.18 No.5

This experiment was carried out to investigate the effect of different levels of pelleted sweet potato on the nutrients utilization of broiler chickens. The results obtained were summarized as follow: 1. The utilization of dry matter was slightly increased as the replacement level of sweet potato was higher. However, there were no statistical differences between treatments. 2. The utilization of crude protein in starter chickens(0-4 weeks) was slightly improved as the replacement level of sweet potato increased but that of growing chickens (5-8 weeks) was decreased as the substitution level of sweet potato increased. 3. The utilization of crude fiber for both starter and growing chickens was significantly (P$lt;0.05) decreased as the replacement level of sweat potato was increased. 4. The utilization of nitrogen free extract (NFE) was slightly improved as the replacement level of sweet potato was increased. On the other hand the utilization of crude fat was not affected by the level of sweet potato used in the broiler rations. 5. In the comparative utilization of nutrients between starter and growing chicken, the utilization of dry matter and crude fiber was higher for the growing chickens than for the starter. Crude protein was better utilized or the starter than for the growing chickens. However, utilization of crude fat and NFE was not affected.

Enhanced photocatalytic elimination of CO₂ gas in spacecraft

Bee Lyong Yang(양비룡),N. Quyet V.,K Karthik,Min Jeong Hong(민정홍),Park Heong Jun(박형준) 한국항공우주학회 2021 한국항공우주학회 학술발표회 논문집 Vol.2021 No.7

Synthesis of Dicyclopentadiene Oligomer Over Nanoporous Al-MCM-41 Catalysts

Park, Eunseo,Kim, Jinhan,Yim, Jin-Heong,Han, Jeongsik,Kwon, Tae Soo,Park, Y. K.,Jeon, Jong-Ki American Scientific Publishers 2016 Journal of Nanoscience and Nanotechnology Vol.16 No.5

<P>One step reaction composed of DCPD oligomerization and DCPD oligomer isomerization was investigated over nanoporous Al-MCM-41 catalysts. The effects of aluminum grafting over MCM-41 on the catalyst characteristics were studied with respect to the synthesis of TCPD isomer. Physical and chemical properties of the catalysts were analyzed by N-2 adsorption, temperature-programmed desorption of ammonia, and infrared spectroscopy of adsorbed pyridine. The overall number of acid sites as well as the number of Lewis acid sites increased with increasing of aluminum content over MCM-41. When utilizing MCM-41 and Al-MCM-41 as the catalyst, DCPD oligomerization reaction activity greatly increased compared to the thermal reaction. The highest TCPD isomer selectivity over the Al-MCM-41 catalyst with the highest aluminum content could be ascribed to the largest amount of acid sites. This study showed an increased level of TCPD isomer selectivity by an increasing level of Lewis acid sites through aluminum addition over MCM-41.</P>