Life table methodology and interference index of population control(IIPC) were used to determine the suppressive effect of azadirachtin on litchi fruit borer(Conopomorpha sinensis Bradley). The results showed that the main suppression of 0.3% azadirachtin was its strong oviposition deterrent effect.
Analysis of the data from the natural population life table with the exclusion index of population control (EIPC) suggested that the death of larvae caused by parasitoids was the important factor in controlling the vegetable leafminer. The EIPC value of the parasitoids was 3.181 7, which means that the population of the next generation would increase by 3.181 7 times if the parasitoids were excluded.
DENG Xiao-ping’s sustainable development concept of economy and society mainly includes:(1) Continuous population control: Control population growth strictly,make great efforts to improve population quality;
The paper proposed that afforestation should be expanded to improve the ecological environment and the population control and industrial structure adjustment should be made to guarantee the regional economy′s sustainable development.
The paper presents the integrated ecological economic rehabilitationmeasures of desertification,including population control, structure readjust-ment and increased input as well as an analysis of ecological, economic andsocial efficiency.
The relationship among the economic development and population, resources and environment must be understood correctly when we build modernization and carry out the continuous development strategy Population control, resources saving and environmental-protection should be put into an important place in order to adjust to the population increase and the development of social productivity and make the economic construction coordinate resources and environment.
Methods:A population -based case-control study was conducted in urban Shanghai from October 1990 to June 1993 involving interviews with 451 incident cases of pancreatic cancer aged from 35 to 74 years and a population control (including 1 552 normals) frequency-matched to cases by gender and age in five year groups.
Methods A 1∶2 matched case-control study was carried out. The cases are the no-smoking female patients with the primary lung cancer diagnosed by pathology mothed from hospitals in Beijing, Shanghai and Chengdu between September 2001 and February 2004. One hospital control and one population control matched for age, sex and no-smoking et al.
Methods The self-rated health measurement scale(SRHMS) was administered to 3 groups(floating population,control and local group). Then the floating population group was received STD/AIDS education. After 1 week of that,the SRHMS was administered again.
Population control or mitigation efforts aimed at urban wildlife require detailed knowledge of the habits of wildlife populations in urban areas.
Toward formal valuation of scientific research projects: A case study in population control
Population control of microglia: does apoptosisplay a role
Toward this idea, the congestion window size of each connection is viewed as population size of a species and then congestion control problem is redefined as population control of these windows species (W).
The current work proposes that the congestion control problem in the Internet can be inspired from natural population control tactics.