• 한국동물위생학회지
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• 제33권2호
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• pp.167-171
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• 2010

Majority of asthma and atopic dermatitis are known to be spontaneously sensitive to house dust mite allergen. Control of house dust mite populations has been principally achieved by using chemical insecticides. But the risk to human health would be a potential problem. Moreover, house dust mite remain as allergens even after death. So, It is more effective method keeping the house dust mites away than killing them. The use of plant-derived repellents has been considered as a promising alternative to chemical repellents. Eucalyptus is a diverse genus of flowering trees in the myrtle family, Myrtaceae. It has insect repellent properties and is an active ingredient in some commercial mosquito repellents. These studies were carried out to investigate repellent effects of Eucalyptus oil against house dust mites and compare lemongrass oil. Eucalyptus oil and lemongrass oil were exposed at different doses (0.2, 0.1, 0.05, 0.025, 0.0125, $0.00625{\mu}l/cm^2$) and different times (1, 3, 6 hours) on house dust mites. The most effective dose of Eucalyptus and lemongrass oils against house dust mites was $0.1{\mu}l/cm^2$ and $0.025{\mu}l/cm^2$. Each repellent effect(%) in most effective dose was 90.3% (Eucalyptus) and 80.8% (lemongrass).

• 대한의생명과학회지
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• 제22권4호
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• pp.211-214
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• 2016

House dust mite is an essential allergen in the pathogenesis of allergic diseases. Abnormal regulation of neutrophil apoptosis is an important pathogenic process in allergic diseases. In the present study, we investigated the effects of house dust mites on spontaneous apoptosis of neutrophils and its associated mechanisms. Extract of Dermatophagoides pteronissinus (DP) inhibited neutrophil apoptosis in a time-dependent manner. Cycloheximide (CHX), an inhibitor of translation, increased apoptosis of DP-treated neutrophils as well as control cells. The pro-apoptotic effect of CHX was blocked by DP in neutrophils. In addition, DP increased the phosphorylation of Bad in a time-dependent manner, indicating that it exerted an inhibitory effect on the function of Bad. These results suggest that DP has anti-apoptotic effects of neutrophils and may regulate protein synthesis and activation of Bad. Moreover, these findings may shed light on elucidation of allergy pathogenesis due to house dust mites.

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2002년도 합동 춘계 학술발표회
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• pp.33-33
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• 2002

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2005년도 춘계 학술발표회
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• pp.54-54
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• 2005

• 한국응용곤충학회지
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• 제41권4호
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• pp.255-261
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• 2002

토마토녹응애(개칭)에 대해 주사전자현미경 관찰, 국내 분포, 기주식물, 온도에 따른 발육상, 약제 방제법에 관하여 연구하였다. 토마토녹응애는 2쌍의 다리를 가진 길이 $134.9\mu\textrm{m}$의 미소동물로 feathered claw는 4줄이었다. 피해증상으로, 피해엽은 적갈색으로 변하고 줄기에는 털이 없어지고 광택이 나거나 표면이 그물형으로 갈라지며, 새순은 시들거나 위축된다. 과일은 과경 부근에 그을음이나 녹이 긴 것 같이 되고, 그물형으로 갈라진다. 충남의 부여와 유성, 강원도 평창, 경북의 칠곡, 구룡포의 유리온실에서 발견되었으며, 한국에서 기주로는 메꽃, 까마중, 가지, 꽈리, 나팔꽃, 페투니아, 감자, 고추, 담배, 토마토 등이 확인되었다. 이 응애는 $15-30^{\circ}C$에서 발육이 가능하였고, 한 세대는 6-11일로 높은 온도일수록 발육기간이 짧아지는 경향이었으며, 암컷이 수컷보다 수명이 길었는데, 25-28$^{\circ}C$에서 12일로 가장 수명이 길었다. 살비제 중에서 fenazaquin과 cypermethrin의 효과가 가장 좋았다.

• Journal of Veterinary Science
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• 제21권3호
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• pp.41.1-41.12
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• 2020

Background: The poultry red mite, Dermanyssus gallinae, is a serious problem in the laying hen industry worldwide. Currently, the foremost control method for D. gallinae is the implementation of integrated pest management, the effective application of which necessitates a precise monitoring method. Objectives: The aim of the study was to propose an accurate monitoring method with a reliable protocol for caged-layer poultry farms, and to suggest an objective classification for assessing D. gallinae infestation on caged-layer poultry farms according to the number of mites collected using the developed monitoring method. Methods: We compared the numbers of mites collected from corrugated cardboard traps, regarding with length of sampling periods, sampling sites on cage, and sampling positions in farm buildings. The study also compared the mean numbers of mites collected by the developed method with the infestation levels using by the conventional monitoring methods in 37 caged-layer farm buildings. Results: The statistical validation provided the suitable monitoring method that the traps were installed for 2 days on feed boxes at 27 sampling points which included three vertical levels across nine equally divided zones of farms. Using this monitoring method, the D. gallinae infestation level can be assessed objectively on caged-layer poultry farms. Moreover, the method is more sensitive than the conventional method in detecting very small populations of mites. Conclusions: This method can be used to identify the initial stages of D. gallinae infestation in the caged-layer poultry farms, and therefore, will contribute to establishment of effective control strategies for this mite.

• 한국유기농업학회지
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• 제14권3호
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• pp.315-323
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• 2006

전남지역 딸기 친환경재배농가에서 큰 피해를 주고 있는 점박이응애를 방제하기 위해 천적인 칠레이리응애의 방사량과 횟수를 검정하고, 농가에서의 실증효과를 시험하였다. 칠레이리응애를 1회 방사하였을 때 방사 4주째부터 밀도가 올라가기 시작하였으며, 2회 방사시에는 7주 이후 8주째부터 밀도 증가가 이루어 졌다. 그러나 3회 방사하였을 때에는 조사기간 동안 점박이응애 밀도를 10마리 내외로 일정하게 유지시킬 수 있었다. 또한 칠레이리응애의 방사량도 1,000마리인 경우에는 생육 후기에 점박이응애의 밀도가 증가하여 방제효과가 낮았으며, 3,000마리를 방사하는 경우에는 2,000마리 처리구와 비슷한 밀도를 유지하는 것으로 보아 천적을 2,000마리 방사하여 점박이응애를 충분히 억제할 수 있었다. 함평 농가실증 시험의 무방사구에서 점박이응애는 3월 하순부터 발생하기 시작하여 이후 급격한 밀도 증가가 이루어졌다. 방사구에서는 칠레이리응애 밀도가 지속적으로 유지되어 점박이응애 밀도를 억제하였다. 보성 농가에서는 3월 상순에 방사구의 점박이응애 밀도가 상승함에 따라 칠레이리응애 밀도도 함께 상승하여 3월 하순에는 10엽당 50마리까지 증가하였다. 발생엽율은 천적 방사구에서는 높지 않았으나 무방사구에서는 초기 밞생이 확인된 이후 계속 상승하여 $10.5{\sim}75.5%$까지 올라갔다.

• Parasites, Hosts and Diseases
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• 제58권3호
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• pp.301-308
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• 2020

Owing to global climate change, the global resurgence of vector-borne infectious diseases and their potential to inflict widespread casualties among human populations has emerged as a pivotal burden on public health systems. Tsutsugamushi disease (scrub typhus) in the Republic of Korea is steadily increasing and was designated as a legal communicable disease in 1994. The disease is a mite-borne acute febrile disease most commonly contracted from October to December. In this study, we tried to determine the prevalence of tsutsugamushi disease transmitted by chigger mites living on rodents and investigated their target vector diversity, abundance, and distribution to enable the mapping of hotspots for this disease in 2015. A total of 5 species belonging to 4 genera (109 mites): Leptotrombidium scutellare 60.6%, L. pallidum 28.4% Neotrombicula tamiyai 9.2%, Euschoengastia koreaensis/0.9%), and Neoschoengastia asakawa 0.9% were collected using chigger mite collecting traps mimicking human skin odor and sticky chigger traps from April to November 2015. Chigger mites causing tsutsugamushi disease in wild rodents were also collected in Hwaseong for the zoonotic surveillance of the vector. A total of 77 rodents belonging to 3 genera: Apodemus agrarius (93.5%), Crocidura lasiura (5.2%), and Micromys minutus (1.3%) were collected in April, October, and November 2015. The most common mite was L. pallidum (46.9%), followed by L. scutellare (18.6%), and L. orientale (18.0%). However, any of the chigger mite pools collected from rodent hosts was tested positive for Orientia tsutsugamushi, the pathogen of tsutsugamushi disease, in this survey.

• Parasites, Hosts and Diseases
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• 제58권2호
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• pp.153-159
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• 2020

The chigger mite Leptotrombidium sialkotense is one of the 6 main vectors of scrub typhus in China. Before present study, L. sialkotense was found in some parts of Hunan province, China with a narrow geographical distribution. During field investigation 2016-2017, we found L. sialkotense in Jingha, southern Yunnan, China. Of 15 small mammal host species, L. sialkotense were collected from 6 species of the hosts. Rattus brunneusculus was a dominant host of L. sialkotense, from which 98.3% of the mites were collected. The chigger mite showed a relatively high infestation prevalence (P_M =11.7%) and mean abundance (MA=0.5) in comparison with the rest 5 host species. These results reveal a certain host specificity of L. sialkotense to a rat R. brunneusculus. The mite L. sialkotense showed an aggregated distribution on the host (P<0.05). A positive correlation observed between L. sialkotense and the body length of hosts. There was a positive interspecific association between L. sialkotense and 2 other dominant vectors, L. deliense and L. scutellare.

• 농약과학회지
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• 제4권4호
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• pp.87-92
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• 2000

인축독성 및 잔효성이 낮은 환경친화적인 Petroleum spray oil(PSO; DC-Tron $Plus^{(R)}$)의 살포에 따른 귤응애에 대한 방제효과 및 약해발생에 관하여 포장조건하에서 검토하였다. PSO를 0.25%, 0.33%, 0.5% 및 1%를 처리한 결과, 귤응애에 대한 방제효과는 모든 농도에서 대조약제(tebufenpyrad, bifenazate, sun spray oil)와 비교하여 비슷하거나 뛰어났으며, 약효도 40일 이상 장기간 지속되는 경향을 나타냈다. 그런데 PSO 0.5% 이상 처리시에는 감귤잎에 유침상 증상이 일부 나타났으나 2개월후에 거의 사라졌으며, 낙엽율과 낙과율은 다소 증가하는 경향이었다. 그리고 PSO 1%를 감출 더뎅이병 및 검은점무늬병의 적용약제와 각각 혼용처리한 결과, 더뎅이병 방제약제인 Fluazinam 수화제와 혼용한 경우 일부 신초가 타거나 일부 신엽에 흑점이 발생하였다. 이러한 약효와 약해 결과를 고려해 볼 때 귤응애 방제를 위한 하절기 PSO 적정 살포농도는 0.25% 또는 0.33% 정도일 것으로 판단된다.