OBJECTIVETo study the population dynamics of aphid on Lonicera macranthoides and their natural enemy in Xiushan and control method of pesticide so as to provide scientific basis for its integrated pests management (IPM).

METHODThe field investigation and the field controlling trial were carried out for the research.

RESULTSemiaphis heraclei was the dominant species among L. macranthoides aphids. The population dynamics of apterous aphids went through five consecutive stages: initial, fluctuating, rising, peak and declining. The population dynamics of alate aphids was 4-7 days later than that apterous aphid's. Significant positive correlations were found between the population size of spiders and ladybugs which were natural enemies and number of aphids. The result of pesticides against aphids in field trial showed that 25% thiamethoxam WG, 70% imidacloprid WG and 20% acetamiprid WP had well controlling effect.

CONCLUSIONAphids on L. macranthoides could be well controlled while 25% thiamethoxam WG, 70% imidacloprid WG and 20% acetamiprid WP are sprayed during the period of aphid population raising, the early April to the mid May.

BACKGROUND: Notified tuberculosis (TB) cases in Korea have not decreased over the last decade (2001-2010). METHODS: To clarify the reasons, we analyzed an annual report on notified tuberculosis patients and age-specific population drift in Korea. RESULTS: Compared to the age-specific notified TB cases between 2001 and 2010, distinctive features in notified TB cases and new cases increased markedly in people aged 45-54 years and in patients over 65 years old, whereas those between 15-34 years in 2010 decreased drastically. In particular, notified TB individuals over 65 years old occupied 29.6% of the cases in 2010, which was 1.5 times higher than that in 2001. The main reason not to decrease in notified TB patients for the last decade (2001-2010) was due to the increasing elderly population as well as the aging of baby boomers, which have a higher risk of TB development. CONCLUSION: Korea needs to pay attention to the older population in order to successfully decrease the burden of TB in the future.
Aged ; Aging ; Humans ; Korea ; Population Dynamics ; Population Growth ; Tuberculosis

The seasonal abundance of horse and deer flies (family Tabanidae) was analyzed using Mosquito Magnet(R) traps at 5 sites located near/in the demilitarized zone, northern Gyeonggi-do, Republic of Korea from late April to early October for 4 consecutive years (2010-2013). A total of 2,999 horse and deer flies (tabanids) belonging to 5 genera and 20 species were collected. Chrysops mlokosiewiczi (90.9%) was the most frequently collected, followed by Haematopota koryoensis (4.8%) and C. suavis (1.0%). The remaining 17 species comprised only of 3.3% of all species collected. C. mlokosiewiczi demonstrated bimodal peak populations during mid-June and early August, while H. koryoensis demonstrated a unimodal peak during mid-July. Overall numbers of tabanids collected were influenced by the previous year's winter temperatures and precipitation. Population abundance was influenced by habitat with most of tabanids collected from habitats near forested areas, followed by rice paddies, and a beef farm.
Animals ; Diptera/*classification/*growth & development ; Ecosystem ; Female ; Male ; Population Dynamics ; Republic of Korea ; Seasons

The objective of this study is to define the population dynamics of Semiaphis heraclei in the main-producing district of Lonicera japonica in Shandong, and screen for highly efficient, safety control technique. Through fixed field investigation, we tested the toxicity of eight kinds of insecticides by using dipping methods, and carried out the field experiment. The results showed that the aphids' emergence peak appeared in May. The aphids on the Sijihua variety of L. japonica was more susceptible and the peak was also seven days earlier than Damao variety of L. japonica. The aphid populations on Sijihua were 1 fold than those on the Daomao in happened peak. Comparing the eight kinds of insecticides, the LC50 of lambda-cyhaothrin, abamectin, imidacloprid and pyrethrin to wingless aphids were 1.494, 1.690, 2.840, 2.861 mg x L(-1), respectively, whose toxicity were higher, the toxicity of matrine, pymetrozine and azadirachtin were also high. The field efficacy trials indicated that during the period of aphids occurred, 25% imidacloprid wettable powder, 1.8% abamectin missible oil, 2.5% lambda-cyhaothrin missible oil, 25% pymetrozine wettable powder, 5% pyrethrin missible oil, 1% matrine water aqua were sprayed at concentrations of 20,000, 2,000, 2,500, 5,000, 500 and 50 times, respectively,the control effect achieved 91.69%, 98.90%, 96.18%, 95.06%, 99.24%, 90.10%, respectively, after 5 days. During the growing period of L. japonica in spring, application of thiamethoxam, thiacloprid, pymetrozine and imidacloprid, all of the control effect against aphids achieved above 98.88% after 50 days. The result indicated that May was the S. heraclei Takahashi's emergence peak in Pingyi, Shandong. The efficient safety and environmentally friendly insecticides by spraying and systemic insecticide of pymetrozine and imidacloprid by root application were all efficient controlled aphids. These insecticides were long for controlling S. heraclei Takahashi and worthy of being widely applied.
Animals ; Aphids ; drug effects ; physiology ; Insect Control ; Insecticides ; toxicity ; Lonicera ; parasitology ; Plant Diseases ; parasitology ; prevention & control ; Population Dynamics

OBJECTIVES: This study presents a scientific basis for the establishment of an environmental health contingency plan for dealing with accidental coastal oil spills and suggests some strategies for use in an environmental health emergency. METHODS: We reviewed the existing literature, and analyzed the various fundamental factors involved in response strategies for oil spill. Our analysis included data derived from Hebei Spirit oil spill and used air dispersion modeling. RESULTS: Spill amounts of more than 1,000 kl can affect the health of residents along the coast, especially those who belong to vulnerable groups. Almost 30% of South Korean population lives in the vicinity of the coast. The area that is at the highest risk for a spill and that has the greatest number of people at risk is the stretch of coastline from Busan to Tongyeong. The most prevalent types of oil spilt in Korean waters have been crude oil and bunker-C oil, both of which have relatively high specific gravity and contain volatile organic compounds, polycyclic aromatic hydrocarbons, and metals. In the case of a spill of more than 1,000 kl, it may be necessary to evacuate vulnerable and sensitive groups. CONCLUSIONS: The government should establish environmental health planning that considers the spill amount, the types of oil, and the distance between the spot of the accident and the coast, and should assemble a response team that includes environmental health specialists to prepare for the future oil spill.
*Accidents ; Decision Support Techniques ; *Disaster Planning ; *Environmental Health ; Environmental Monitoring ; Environmental Pollution/*prevention & control ; *Petroleum ; Population Dynamics ; Risk Assessment

To investigate the population densities of potential malaria vectors, Anopheles species were collected by light traps in malaria endemic areas, Paju and Gimpo, Gyeonggi-do of Korea. Five Anopheles Hyrcanus sibling species (An. sinensis, An. pullus, An. lesteri, An. kleini, and An. belenrae) were identified by PCR. The predominant species, An. pullus was collected during the late spring and mid-summer, while higher population consists of An. sinensis were collected from late summer to early autumn. These 2 species accounted for 92.1% of all Anopheles mosquitoes collected, while the other 3 species accounted for 7.9%. Taking into account of these population densities, late seasonal prevalence, and long-term incubation period (9-13 months) of the Korean Plasmodium vivax strain, An. sinensis s.s is thought to play an important role in the transmission of vivax malaria in the study areas.
Animals ; Anopheles/*classification/genetics/*growth & development ; Humans ; Malaria, Vivax/transmission ; Polymerase Chain Reaction/methods ; Population Dynamics ; Republic of Korea ; Seasons

OBJECTIVE: To study the species of sarcosaphagous insects. METHODS: Rabbits were killed and placed outdoors from March to November. Flies that appeared the cadavers were observed and identified. RESULTS: There are five main flies, i.e., Muscadomesticauicina, Lucilia sericata, C. Megacephala, S. fuscicauda, Aldrichiragrahormi. From midtime of April to the beginning of October, Muscadomesticauicina could be seen on the cadvers, however, Aldrichiragrahormi only could be seen before the beginning of May. Otherwise, Lucilia sericata, C. Megacephala, S. fuscicauda could be seen on the cadvers from March to the end of October. After the midtime of November, none of sarcosaphagous flies could be seen on the cadvers. On the other hand, maggots of sarcosaphagous flies could be seen often on the cadvers after adults of sarcosaphagous flies intruding 1 to 4 days, relating to temperature of environment. CONCLUSION If these flies history of life be studied. it is useful for estimating postmortem interval in Chengdu.
Animals ; Cadaver ; Diptera/physiology* ; Entomology/methods* ; Forensic Medicine ; Larva/growth & development* ; Population Dynamics ; Postmortem Changes ; Rabbits ; Seasons ; Time Factors

OBJECTIVE: To explore the growing development and community succession of main sarcosaphagous insects on pig carcasses in summer indoor and outdoor environment in Shenzhen area and to estimate the postmortem interval (PMI). METHODS: From early May to August in 2013, in Forensic Medical Examination Center of Shenzhen Public Security Bureau, the main insect species and the decomposition process were observed in two adult pig carcasses of simulative indoor and outdoor environment. The different decomposition stages and the community succession of insects were recorded. RESULTS: The indoor and outdoor pig carcasses showed skeleton 412.5 and 325 hours after death, respectively. The main species of flies on pig carcasses were Chrysomya megacephala, Chrysomya rufifacies and Chrysomya chani. The main species of beetles were Crecphilus maxillosus, Necrobia ruficollis, Saprinus splendens and Dermestes maculatu. The dominant species of flies in the outdoor pig carcasses obviously produced the second generations due to the effect of mass rainfall, nor in the indoor pig carcasses. CONCLUSION There are regular patterns on the community succession of insects on pig carcasses in summer indoor and outdoor environment in Shenzhen area. The activity patterns of seven typical insects and their larva show important value for estimating PMI.
Animals ; Autopsy ; Cadaver ; China ; Coleoptera ; Death ; Diptera ; Environment ; Insecta/growth & development* ; Larva ; Population Dynamics ; Postmortem Changes ; Seasons ; Swine

OBJECTIVETo study the characteristics of the effect of different temperatures on mortality of different cities through analyzing the relationship between mortality and meteorology of five Chinese cities.

METHODSWe get the demography and climate data of Beijing, Tianjin, Shanghai, Nanjing and Changsha cities from National Center of Disease Control and Prevention and Climate net respectively. Then we applied the R software and Distributed Lag Non-linear Models (DLNM) package to analyze our data and find the nonlinear and lag effects on mortality using DLNM.

RESULTSThe city of Beijing and Tianjin are located in the temperate zone. And the climate of Shanghai, Nanjing, Changsha belong to subtropical monsoon climate. When the daily mean temperature arrived 30°C and on lag 0 day, the values of relative risk of effect of high mean temperature on mortality in Nanjing (1.31, 95%CI: 1.21 - 1.41) and Changsha (1.25, 95%CI: 1.13 - 1.39) are larger than that in Beijing (1.18, 95%CI: 1.12 - 1.25), Tianjin (1.18, 95%CI: 1.10 - 1.26) and Shanghai(1.15, 95%CI: 1.06 - 1.24). While the relative risk of effect of low mean temperature on mortality is lower and lasts for a longer lag time. During the whole lag time, the relative risk of effect of the lowest daily mean temperature of each city on mortality in Tianjin, Changsha, Beijing, Nanjing, and Shanghai is 3.41, 95%CI: 1.60 - 7.27, 2.15, 95%CI: 1.11 - 4.15, 2.24, 95%CI: 1.12 - 4.48, 2.80, 95%CI: 1.75 - 4.48, 1.53, 95%CI: 1.12 - 2.03, respectively. The cumulative effect of mean temperature on mortality appears like a U-shape. When on lag 0-1 day, the value of relative risk of effect of extremely high temperature and the highest mean temperature on mortality is larger than 1. While the effect of low temperature on mortality becomes obvious after lag 2 days.

CONCLUSIONDepending on this research, extremely low temperature and the lowest mean temperature has a more obvious impact on mortality in the northern area than in the south. Extremely high temperature and the highest daily mean temperature is on the contrary. Meanwhile, different temperatures have different impacts on mortality in the same city: high temperature has an acute impact while there is a longer lag time in low temperature.

Public nutrition is related to the improvement of population health and the development of social economy. Nutrition and health survey can provide indispensable information for public health and disease prevention and control to improve people's nutritional and health status and support the policy making of food production and chronic diseases prevention and control. In recent years, China's nutritional supply capacity has increased significantly. Our people's nutritional and health status has improved significantly. The articles published in "Nutrition and Health Survey" column come from nutrition surveys both at the national and provincial level. They are making full use of data to give information on not only nutritional and health status of residents throughout the country, but also regional features. These results will provide a detailed and reliable reference for both national and regional nutrition and health policy and strategy making. At present, China's nutrition work faces many challenges. China's Party Central Committee and the State Council always places great emphasis on people's nutritional and health status. In order to promote the health of the whole population in our country, our government has implemented a number of nutrition promotion policies or strategies. Chinese nutrition and health survey will further evaluate the effect of these movements.
China ; Health Surveys ; Incidence ; Nutrition Surveys ; Nutritional Status ; Population Dynamics