Efficacy of modified diatomaceous earth on different cockroach species (Orthoptera, Blattellidae) and silverfish (Thysanura, Lepismatidae)

Autor: M. K. Faulde, Jerrold J. Scharninghausen, M. Tisch
Rok vydání: 2006
Předmět:
Zdroj: Journal of Pest Science. 79:155-161
ISSN: 1612-4766
1612-4758
DOI: 10.1007/s10340-006-0127-8
Popis: Defined populations of American (Periplaneta americana), German (Blattella germanica), and Oriental (Blatta orientalis) cockroaches, and silverfish (Lepisma saccharina) were observed after exposure to deposits (25 g/m2) of a new 1,1,1–trimethyl-N-trimethylsilane-modified, highly hydrophobic diatomaceous earth (DE) formulation by using a computer-aided device measuring motility, circadian rhythm, and mortality under defined environmental and climatic field-simulating and exposure-enforced conditions. In a humid climate (85% relative humidity) with water and food offered ad libitum, complete population eradication could be achieved on the sixth day against B. germanica, on the eighth day against P. americana, and on the ninth day against L. saccharina, respectively. No population eradication occurred within 10 days of exposure when testing B. orientalis, showing a mean survival rate of 29.4 ± 6.7 % of the populations. When comparing the species-specific mortality rates with the results obtained from corresponding reference control groups, significantly higher mortality rates could be observed in B. germanica (F = 66; df = 52; P P. americana (F = 51; df = 24; P L. saccharina (F = 43; df = 24; P > B. orientalis (F = 9; df = 15; P
Databáze: OpenAIRE
Externí odkaz: