Examination of efficacy of magnesium phosphide (Detiaphos R) against the cigarette beetleLasioderma serricorne (Fabr.) (Col., Anobiidae) at low temperatures

Tobacco was fumigated to control the cigarette beetleLasioderma serricorne (Fabr.) with a fumigant based on magnesium phosphide (Detiaphos R) in hogsheads and cartons at temperatures almost constantly below freezing point and alternatively at temperatures which increased or decreased very slowly in the course of the fumigation. The dosage was 1 g PH₃ per m³ and the fumigation lasted 96 h in all cases. Gas concentration measurements in the tobacco and under sheeting showed that PH₃ developed rapidly in lethal concentrations from magnesium phosphide at low temperatures. Complete mortality of the inserred test insects was registered after the 96 h fumigation period. With magnesium phosphide, a fumigant is available which can be used for fumigating tobacco even at low temperatures.     

Mortalität des Kornkäfers,Sitophilus granarius,bei Begasung mit Methylbromid in Abhängigkeit von der relativen Luftfeuchte

the mortality of the grain weevil,Sitophilus granarius, treated with methyl bromide at 25° and 30°C is influenced by the relative humidity. The concentrationtime product for a mortality of 90% increases significantly with humidity.     

Zur Methode des Einsatzes künstlicher Substrate zum Nachweis der Wieder- oder Neubesiedlung eines Fließgewässers durch Kriebelmücken (Simuliidae,Diptera)

It is demonstrated that the re-population of an artificial substrate by Simuliidae can be recognized both at any early larval stage and when only small numbers of individuals are present. The use of an artificial substrate is therefore a sensitive method for population studies.     

Wasserhaushalt,Stoffeintrag, Stoffaustrag und biologische Studien im Naturpark Schönbuch bei Tübingen

Ohne Zusammenfassung (Prof. Agerer seit 1982 am Institut für Systematische Botanik, München). (Weilimdorf) (zuvor t?tig bei der FVA Stuttgart, siehe oben) (Hohenheim)     

Insekten-Einschlußpräparate aus Polyesterharzpräparate aus Polyesterharz

Ohne Zusammenfassung