Untersuchungen über die Wirkung Dichlorvos-abgebender Strips auf die außerhalb des Lagergutes lebenden Entwicklungsstadien der Dörrobstmotte (Plodia interpunctella Hbn.) in Getreideschüttbodenlägern

Zusammenfassung Es wurde untersucht, an welchen Entwicklungsstadien die Mittelwirkung DDVP-abgebender Strips bei der Bekämpfung vorratsschädlicher Motten in Getreideschüttbodenlägern ansetzt. Ausgewachsene, verpuppungsreife Larven der Dörrobstmotte (Plodia interpunctella), die in den ersten 2 Monaten nach dem Aufhängen der DDVP-Strips in das Getreidelager ausgebracht werden, starben zum größten Teil bereits als Larven oder Puppen. Später ausgebrachte Larven konnten sich zu maximal 78% zu geschlechtsreifen Faltern weiterentwicklen und auch Eier ablegen, die jedoch sogar in künstlich mit DDVP-freier Luft gespülten Versuchsgefäßen nicht entwicklungsfähig waren.

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Effects of dichlorvos strips on stages of plodia interpunctella Hbn. living out of stored products in granaries

Experiments were carried out on the problem which developmental stages are affected by Dichlorvos strips in the control of stored products moths in granaries. Most of the larvae in the migratory stage of the Indian-meal-moth (Plodia interpunctella) that were brought into a granary within the first 2 months after the strips had been hung, died already in the larval or pupal stage. Subsequently exposed larvae could develop up to 78% into sexually mature moths and lay eggs, which, however, could not develop even in artificially aerated experimental cages.

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Mit 4 Abbildungen und einer Tabelle     

Wirkung der Glasur von Reis auf die Vermehrungsfähigkeit von Vorratsschädlingen

The glazing of rice kernels with a coating of glucose and talc has a limited effect against infestation by some stored product insects. In the case of long kernel rice the development of te offspring ofTribolium castaneum, Tribolium confusum, Sitotroga cereallella andOryzaephilus surinamensis is significantly inhibited. In case of round kernel rice, a protecting effect againstTribolium castaneum, Tribolium confusum andOryzaephilus surinamensis is observable; whereasSitophilus granarius, Sitophilus oryzae andRhizopertha dominica have a greater number of progeny on glazed than on unglazed round kernel rice.     

新疆南部夏季高温的公路交通响应

通过对2008年夏季(6～8月)若羌模拟公路路面温度的实验数据及同期若羌气象观测资料的分析,得出:若羌模拟公路路面最高温度对交通运行有影响的概率高达73%,有很大影响和有严重影响的概率分别为40%,23%;在晴天12:00～18:00时,对交通运行有影响的概率达68%;日最高气温在37℃以上和35～37℃时,若羌模拟公路路面最高温度对交通运行有影响的概率分别达100%,87%.同时,利用塔克拉玛干沙漠周边公路沿线9个气象观测站(库尔勒、若羌、且末、民丰、和田、叶城、喀什、阿克苏、库车)近48年(1961-2008年)5～9月气温和地面温度资料,对其气候概况和气候变化特征进行分析,得出近48年夏季最高地面温度总体为上升趋势,尤其是20世纪80年代以后上升幅度较大.     

Impacts of rising atmospheric carbon dioxide on model terrestrial ecosystems

In model terrestrial ecosystems maintained for three plant generations at elevated concentrations of atmospheric carbon dioxide, increases in photosynthetically fixed carbon were allocated below ground, raising concentrations of dissolved organic carbon in soil. These effects were then transmitted up the decomposer food chain. Soil microbial biomass was unaffected, but the composition of soil fungal species changed, with increases in rates of cellulose decomposition. There were also changes in the abundance and species composition of Collembola, fungal-feeding arthropods. These results have implications for long-term feedback processes in soil ecosystems that are subject to rising global atmospheric carbon dioxide concentrations.     

Ultraslow electron spin dynamics in GaAs quantum wells probed by optically pumped NMR

Optically pumped nuclear magnetic resonance (OPNMR) measurements were performed in two different electron-doped multiple quantum well samples near the fractional quantum Hall effect ground state nu = 13. Below 0.5 kelvin, the spectra provide evidence that spin-reversed charged excitations of the nu = 13 ground state are localized over the NMR time scale of about 40 microseconds. Furthermore, by varying NMR pulse parameters, the electron spin temperature (as measured by the Knight shift) could be driven above the lattice temperature, which shows that the value of the electron spin-lattice relaxation time tau1s is between 100 microseconds and 500 milliseconds at nu = 13.