철모깍지벌레의 생물적 방제를 위한 애홍점박이무당벌레의 포식능력과 기초 생태특성을 25℃± 2℃, 70% ± 5%, 16L : 8D로 설정된 사 육실에서 검정한 결과, 애홍점박이무당벌레 성충은 하루에 77.5마리의 철모깍지벌레를 포식하여, 깍지무당벌레 포식력의 2.9배, 어리줄풀잠자 리 포식력의 2.8배 이상의 뛰어난 포식능력이 관찰되었다. 1령 ~ 4령 유충 기간 동안 659.0마리의 철모깍지벌레를 포식하였고, 애홍점박이무당 벌레와 철모깍지벌레의 밀도 별 상호작용을 조사한 결과 Holling (1959)의 기능반응곡선 제 II 형과 유사한 포식반응을 확인하였다. 애홍점박이 무당벌레는 철모깍지벌레를 먹이로 공급했을 때 알에서 성충까지 21.1일 ~ 27.9일이 소요되었으며, 72.3%, 77.8%, 83.3%의 높은 부화율, 용화 율과 우화율을 보였다.

This study were performed in Tropical Plant Resources Research Center of Korea National Arboretum, Pocheon, Korea to assess the effects of beneficial insects against Pseudococcus comstocki (Kuwana) on Phyllanthus acidus (Linnaeus) Skeels and Tetranychus urticae Koch on Acalypha wilkesiana Muell Arg. We investigated the density of leaf-feeding P. comstocki at intervals of approximately 2 weeks and T. urticae at intervals of approximately 1 weeks after introducing their natural enemies; Chrysoperla nipponensis (Okamoto) and Phytoseiulus persimilis Athias-Henriot. The densities of P. comstocki were suppressed 80.0% (after 4 weeks) and 97.5% (after 8 weeks) after introducing C. nipponensis. The densities of T. urticae were suppressed 84.1% (after 4 weeks) and 99.6% (after 6 weeks) after introducing P. persimilis.

This paper studies on the effects of new biological control system, particularly on banker plants of Orius laevigatus to control Frankliniella occidentalis on rose. Orius banker plants for Frankliniella occidentalis were investigated under the conditions of photoperiod 16L:8D, 70 ± 5% RH and 22 ± 2oC. Three types of plants(Sedum sarmentosum, ortulaca grandiflora, Mentha rotundifolia) were used to effectiveness verification of egg taking. And P. grandiflora has been selected as the banker plants for O. laevigatus. Result from this banker plants clearly demonstrated that the population of F. occidentalis was kept under the economic threshold level (1.9 per flower).

Biological control of Pseudococcus comstocki (Kuwana) with new indigenous natural enemy (Chrysoperla nipponensis (Okamoto)) was carried out on tropical plant (Trachycarpus fortunei (Hook)) from May to July in 2013. Control experiments were conducted at Tropical Plant Resources Research Center of Korea National Arboretum, Pocheon, Korea. Chrysoperla nipponensis was released once (20 larvae/m2) to control Pseudococcus comstocki on 11st May in 2013. We investigated the density of leaf-feeding P. comstocki at intervals of approximately 7 days after introducing their natural enemy, C. nipponensis. The densities of P. comstocki were suppressed 22.4% (after 4 weeks) and 8.2% (after 6 weeks) after introducing C. nipponensis.

Yellow tea thrip (Scirtothrips dorsalis Hood (Thysanoptera: Thripidae) is anthophilous pests of many crops worldwide including five flavor berry. And the mealy bug (Pseudaulacaspis cockerelli (Cooley) (Hemiptera: Diaspididae)) is one of the hardest pests to control. Its body is covered with white waxy threads, which often make a chemical pest control useless. Five flavor berry (Schisandra chinensis Baill) is used in traditional Chinese medicine. So, the development of biological control against the major pest on five flavor berry is of great interest. In this work, a treatment of Chrysoperla nipponensis (Okamoto) was applied to five flavor berry fields infested by P. cockerelli and a treatment of Amblyseius swirskii Athias-Henriot was applied to two types of five flavor berry fields infested by S. dorsalis. Even though our tests found significant differences between the two culturing method(sod culture, nonwoven type mulching), the treatment of biological control agents decreased or a little increased the fruit damage, which was comparable to the chemical insecticide treatment. In the sod culture experiment, thrip population was significantly low and increased at a lower rate than in the nonwoven type mulching. It may be suggested from these results that A. swirskii and C. nipponensis as IPM program and sod culture could be incorporated into the integrated pest management system on five flavor berry.

F. occidentalis causes to decrease the yield of chrysanthemum flower economically because it is the major crop pest injuring the flower directly at flowering period in chrysanthemum artificial houses. The control of it with chemicals is very difficult because the resistance of it to chemicals is so high. F. occidentalis began to occur at early-May and increased rapidly mid-May after in standard chrysanthemum artificial houses, Yesan, Chungcheongnam-do. In case of a farm, the density of it increased continuously in spite of chemical control . The times of chemical control to depress the density of it was 6 or 7th for cultivation period of chrysanthemum. We put the flowering yellow pot-mum already (trap plant attracting F. occidentalis) in standard chrysanthemum PVC-houses and set the yellow sticky cards up at an interval of 5m from trap plant(TP). The more yellow sticky trap near to trap plant, the more F. occidentalis was attracted to yellow sticky trap. TP was more attractive to adult F. occidentalis up to distances of 10m. The numbers of it attracted to yellow sticky traps at different distance from TP was not different significantly when standard chrysanthemum bloomed. We put the TP in standard chrysanthumum PVC-house at an distance of 20m and released the natural enemies (Orius laevigatus) on TP at 3 times, an interval of 7 days. And then we set yellow sticky traps up at an distance of 5m from TP and compared the plot with TP+natural enemy(NE) to the plot without them. The density of F. occidentalis was rather lower at TP+NE plot than the plot without at the formative period of flower bud of standard chrysanthemum. Therefore, The yellow flowering chrysanthemum possesses great value of TP attracting F. occidentalis in chrysanthumum PVC-house up to flowering period of cultivating chrysanthemum, and if it is used with natural enemy and chemicals simultaneously, farmers can minimize the quantity of chemicals used.

흉부 및 복부 CT 검사 시 산란선에 의한 안구와 갑상선의 방사선 피폭선량을 측정하고, 피폭선량의 감소를 위해 차폐체를 사용함으로써 방사선 피폭 정도를 조사하였다. 임상에서 사용되는 흉부 및 복부 CT 검사 프로토콜을 적용하여 안구와 갑상선의 차폐체 사용 전과 후의 선량을 측정하여 비교하였다. 안구와 갑상선 의 표면선량은 OSLD를 사용하여 측정하였다. 산란선을 차폐하기 위해 바륨, 텅스텐 시트와 고글과 목차 폐체를 사용하였다. 흉부 CT 스캔 시 차폐를 하지 않고 스캔한 안구는 3.01 mSv，갑상선은 6.21 mSv로 측정 되었고 복부 CT 스캔 시 차폐를 하지 않고 스캔한 안구는 0.55 mSv，갑상선은　3.22 mSv를 나타내었다. 바륨과 텅스텐 시트는 흉부 CT 검사 시 안구와 갑상선의 차폐율이 11～13%이었고, 복부 CT 검사 시에는 34～49%까지　방사선 피폭의 저감 효과가 있었다. 흉부 및 복부 CT 검사　시 방사선 피폭 정도가 상당하기 때문에 검사가 반복, 지속적으로 이루어진다면 방사선 피폭으로 인해 갑상선 암, 백내장 등 방사선 위해가 발생할 가능성이 있어 검사 시 차폐체를 사용하는 것이 요구된다.