Z. Naturforsch. 43c, 463-466 (1988); received February 2, 1988 Sex Attractant, Field Trapping, Diachrysia chrysitis, Diachrysia tutti, Lepidoptera Sex attractants for the sibling taxa Diachrysia chrysitis (L.) s.str. and D. tutti (Kost.) were field tested on 9 sites in Hungary. Catches with the two already described attractant blends, Z-5-10:Ac/ Z-7-10:Ac in ratios 10:1 and 2:100, were similar ...

Exploratory factor analysis involves five key decisions. The second decision, how many factors to retain, is the focus of the current paper. Extracting too many or too few factors often leads to devastating effects on study results. The advantages and disadvantages of the most effective and/or most utilized strategies to determine the number of factors to extract will be explored. Equipped with...

Moon and Moser (Israel J. Math. 1 (1962) 163-165) showed that if G is a balanced bipartite graph of order 2n and minimum degree 0>~(n + 1)/2, then G is hamiltonian. Recently, it was shown that their well-known degree condition also implies the existence of a 2-factor with exactly k cycles provided n~> max{52,2k -~ + 1}. In this paper, we show that a similar degree condition implies that for eac...