FRW阻燃杨木胶合板物理力学性能和阻燃性能的研究

选用新型木材阻燃剂FRW处理杨木单板,研制阻燃性能优异的FRW阻燃杨木胶合板,并对其各项物理力学性能和阻燃性能进行了测试.结果表明:FRW阻燃杨木胶合板的物理力学性能可达到GB 9846-2004《胶合板普通胶合板通用技术条件》的规定,阻燃性能达到日本标准JISD1322-77中规定的难燃一级品标准和中华人民共和国公共安全行业标准GA/T42.1-92《阻燃木材燃烧性能试验方法--木垛法》的规定.     

Ein praxisnaher Versuch zur Ermittlung der Dauerwirkung von Bacillus thuringiensis Berliner gegen die Dörrobstmotte Plodia interpunctella Hbn in einem Getreideschüttbodenlager

In order to test, under warehouse conditions, the longterm effectiveness of THURICIDE® dust, containingBacillus thrungiensis var.kurstaki (=Serotype H_{3a, 3b}), with a viable spore count of 6 to 10 million per mg, the biopreparation was applied to rye, stored in bulk, on which larvae of the Indian Meal Moth (Plodia interpunctella Hbn.) were fed. From May to October, moth eggs were exposed monthly to rye dusted with 100 mg (320×10³ IU) resp. 150 mg (480×10³ IU) THURICIDE® dust per 100 g grain respectively. At a concentration of 100 mg 0.2% to 2.4% of the larvae, which hatched from the eggs in May, June and August, survived to the adult stage. No moths were observed in the experiments continued during September and October. At a cocentration of 150 mg, only in the experiments started in June and July 2.7% and 0.1% respectively of the eggs and larve survive to become adults. In the experiments of May, August, September and October, none were stated to have survived. The biopreparation-free control of May, June and July showed that about 75% of the eggs/larvae reached the adult stage, whereas, in August, September and October, untreated eggs and larvac reaching the adult stage amounted to 14% and 1% respectively. In reason of the combination of the efficiency ofBacillus thuringiensis and of the only small amount of surviving larvae due to the low temperatures during autumn and winter months, the surface application of THURICIDE® dust would be promising measure for combatting moth pests in bulk-stored grain.     

Rasterelektronenmikroskopische Untersuchungen an von Vorratsschädlingen angegriffenen Verpackungsfolien aus synthetischen Kunststoffen und abgewandelten Naturstoffen

Packaging foils made of cellulose actetate, cellophane, polyethylene, polypropylene, polystyrene, polyester, polyvinyl chloride, attacked byRhizopertha dominica F.,Stegobium paniceum L.,Tribolium castaneum Hbst. and larvae ofPlodia interpunctella Hbn. were examined with the scanning electron microscope (SEM). Because of the destruction marks made by the insects, it is possible to determine with the SEM the side of packaging material which has been attacked by the pests. Due to the shape and position of the mouthparts of the insects the gnawing marks are rather typical for the different species. By means of a standard of comparison it might be possible to determine the family and perhaps the genus or species of the insects involved. The influence of shape and size of the mouthparts as well as the position of the mandibles in relation to the anatomy and to the axis of the body on the gnawing ability of stored-product pests is discussed. The reasons for the insect resistance of packaging materials are discussed (smoothness of the surface, rigidity, thickness).     

Buchbesprechungen

Ohne Zusammenfassung     

Die Fraßtätigkeit von Dermestidenlarven (Dermestes peruvianus Castelnau) in verschiedenen Baustoffen

20 trials of materials used in buildings have been offered to dermestid larvae to bore in for pupations. Two different types of damage are described. Eight different test substances have been more or less damaged by the larvae.     

Einfluß der relativen Feuchte auf die Wirkung von Methylbromid bei Khaprakäferlarven (Trogoderma granarium Everts) (Dermestidae,Coleoptera)

The influence of relative humidity on the efficiency of methyl bromide to Khapra Beetle larvae (Trogoderma granarium Everts) (Dermestidae, Coleoptera) Laboratory experiments were carried out at 30, 10 and 0 °C to investigate the effect of relative humidity during fumigation time on the susceptibility of Khapra Beetle larvae to methyl bromide. Experimental results at 30 °C show an increase in the susceptibility of the larvae to methyl bromide with a rise in the relative humidity. A significant differen in the susceptibility of the larvae was found at this temperature with a change in the relative humidity from 20–25% to 90–95%. At 10 °C the estimated c.t.-products for a given mortality are slightly higher at low humidity (35–40%) than at higher humidity (85–90%), however, no significant difference was found between these data. At 0 °C a variation in the relative humidity from 30–40% to 80–90% shows no significant effect on the susceptibility of the larvae to methyl bromide.     

Der altägyptische Orden der goldenen Fliege

Ohne Zusammenfassung     

Bericht über zwei Teilflächen des zweiten Internationalen Lärchen-Provenienzversuches 1958/59 nach 8-bzw. 7jähriger Wuchszeit

Zusammenfassung Zwei in der Pfalz und im Spessart gelegene Teilfl?chen des zweiten Internationalen L?rchen-Provenienzversuches 1958/59 wurden im Jahre 1965 vom Institut für Forstsamenkunde und Pflanzenzüchtung München aufgenommen. Die Ergebnisse dieser Aufnahme werden gemeinsan mit früheren Messungen mitgeteilt. Die besten H?henwuchsleistungen mit mehr als 110% des jeweiligen Fl?chenmittels erreichten die Herkünfte aus den Sudeten, je eine Herkunft aus der Steiermark und aus Japan sowie die Nachkommen zweier nicht autochthoner Best?nde in Schleswig-Holstein und im B?hmerwald. Die geringsten H?henwuchsleistungen besa?en Hochlagenherkünfte aus den Südwest-Alpen. Bei der Qualit?tsansprache zeigten gerade die wüchsigsten Sorten h?ufig einen hohen Anteil an wahrscheinlich genetisch bedingten Schaftverkrümmungen, die sich sp?ter m?glicherweise wieder ausgleichen k?nnen. Zwischen der Seeh?he der Herkunftsbest?nde und der Leistung ihrer Nachkommenschaften bestehen offenbar relativ enge negative Korrelationen.