The German cockroach Blattella germanica (L.) Is a worldwide health beneficial insects, in recent years in China's rapid dispersed, in many areas stretch disaster, and instead of the eve of the black breasted germanica become new indoor cockroach species. In recent years, about the German cockroach, Blattella germanica prevention, pest investigation has a large number of reports. However instead of a other indoor cockroach as there is no system of mechanism of dominant populations in the research report. It is, in this study, through indoor experiment, observations of different temperature of Blattella germanica and black in the eve of the cockroach reproduction and development development, compared to the difficulties of Blattella germanica and black in the eve of the cockroach survival time, in the same premise two cockroach population static research, and explore the Blattella germanica and black in the eve of the cockroach to adaptation, different temperatures developmental duration and interspecific competition and cockroaches spread dispersion is close together and relevant several factors, to grope for Blattella germanica in dispersed in the spread of the biological and ecological advantages, and dispersed the original cockroach effect, to prevent and control the supply of useless reference. Important research results below 1 different temperatures of Blattella germanica and black in the eve of the cockroach reproduction and development development separation at 16 degrees, 20 degrees, 24 degrees, 28 degrees, 32 DEG C not Yacha Blattella germanica and black in the eve of the cockroach development duration and calculating the growth speed and invention temperature of Blattella germanica and black in the eve of the cockroach development duration affect, in different temperature disposal, the development speed of Blattella germanica were significantly large in black in the eve of the cockroach. Also compare Blattella germanica and black in the eve of the cockroach in different temperatures oviposition amount and hatching rate of eggs, considers to discover black in the eve of the cockroach eggs and egg hatching rate is affected by temperature is greater, similar temperature black in the eve of the cockroach fecundity in the eve of the German cockroach, Blattella germanica, but egg hatching rate lower than the German cockroach, Blattella germanica. 28 degrees, Blattella germanica and Black Americana pectoralis major development of the shortest duration, fecundity and egg hatching rate. 2 Blattella germanica and black in the eve of the cockroach in dilemma under the premise of the survival time of the match warm Du is too high or too low all affect the survival time of two kinds of cockroaches. In high temperature scale (5 DEG C 5 DEG C), Blattella germanica and black in the eve of the Periplaneta americana nymph and male and female adult survival time with temperature decreasing significantly prolonged trend; in the low temperature scale (40 DEG to 50 DEG C), Blattella germanica and black in big differences of cockroach species of survival time with decreasing temperature and prolonged. In the high temperature at the disposal of the German cockroach nymph survival time of the most long, separated into 0. 79 days, 1. 98 days, 25. 76 days. In the low temperature in the disposal of Blattella germanica in the female adults of the longest survival time, separated into 10. 74 days, 3. 84 days and 2. 76 days. Results of annotation of Blattella germanica in response to high temperature and low temperature is better than that of Black Americana Nianye chest distress. Results of annotation of Blattella germanica in response to high temperature and low temperature is better than that of Black Americana Nianye chest distress. Lack of food or water Yi the livelihoods of two kinds of cockroaches formed the harmful effects in water without food, potable water without, anhydrous, under the premise of food, black in the eve of the cockroach adult male survival time longest separation is 45. 50 days, 32. 03 days and 33. 37 days. The effect of water on the cockroach life significantly, water disposal of two species of cockroaches survival time were significantly higher than that of anhydrous disposal. But under anhydrous conditions, food disposal of Blattella germanica survival time was significantly higher than that in the no food treatment, first instar nymph and adult female and male adult life in the absence of food separated into 7. 43 days, 15. 43 days, 8. 75 days; progress to 9 in the case of food. 67 days, 18. 39 days and 11. 21 days, and black in the eve of the cockroach among species survival time in that there is no food and no food in the disposal of the difference is not obvious; and black in the eve of the cockroach compared Blattella germanica is more responsive to water shortages. Three different flocks and density of Blattella germanica and black in the eve of the cockroach egg hatching rate, first instar weight of differences in captive density, Blattella germanica and black in the eve of the cockroach egg hatching rate of research notes and follow growth of captive density, Blattella germanica and black in the eve of the cockroach egg hatching rate decreased, when the density of captive from 5 / bottle up to 25 / bottle, Blattella germanica hatching rate from 89. 65% down to 70. 54%, big black chest Americana hatching rate from 85. 64% down to 68. 54%. The density of Blattella germanica hatching rate was higher than that of black chest big cockroach. Along with the increasing feed density, weight of first instar nymphs are declining. When the feeding density from 5 to rise to 25 / bottle / bottle, the German cockroach nymph weight from 14. 51 mg down to 7. 86 mg Black Americana nymph pectoralis major weight is from 43. 02mg down to 26. 11 mg. 4 Blattella germanica and black in the eve of the cockroach interspecific competition research of Blattella germanica and black in the eve of the cockroach interspecific competition, take a Lotka Volterra interspecific competition model fitting, results annotations individually reared Blattella germanica and black in the eve of the cockroach population numbers were significantly higher than those of hybrid, raise the number of population, between the two species are interspecific competition, which belongs to the application of competition of capital. Individually reared and mixed flocks and Blattella germanica population numbers are larger in black in the eve of the cockroach population; hybrid captive under the premise of the two species of interspecific competition in an unstable equilibrium, quasi wins is decided in the initial state of the population on who is more beneficial, mixed flocks 目录: |
