Recent theory and data suggest that adaptive use of learning in the context of sexual behaviour could contribute to assortative mating. Experiments examining this issue indicated that male Drosophila persimilis that experienced courtship and rejection by heterospecific females exhibited significantly lower levels of heterospecific courtship and mating compared with those of inexperienced males....

Koch (Acari: Tetranychidae) is a major pest mite infesting vegetables and horticultural ornamental agronomic crops in Egypt. In biological control strategies, natural enemies were applied to maintain TSSM population below the level where damage occurs for an extended period of time besides utilizing acaricides critical situation as quick practice avoid deleterious damage. This study evaluated p...

F(1) hybrid male sterility is thought to result from interactions between loci on the X chromosome and dominant-acting loci on the autosomes. While X-linked loci that contribute to hybrid male sterility have been precisely localized in many animal taxa, their dominant autosomal interactors have been more difficult to localize precisely and/or have been shown to be of relatively smaller effect. ...

Predatory mites that belong to the Phytoseiidae family are one of the main natural enemies of phytophagous mites, thus allowing for their use as a biological control. Phytoseiulus macropilis (Banks, 1904) (Acari: Phytoseiidae) is among the main species of predatory mites used for this purpose. Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) is considered to be one of the most important sp...

Courting males of Drosophila persimilis produce a pulsed "vibration sound," with frequency of oscillation and pulse repetition rate markedly different from that of D. pseudoobscura. These differences probably contribute to reproductive isolation. Flight frequency is the same in both species. Brief "preliminary sounds" are common and the same in both species. Males with large parts of both wings...

Temporal Stability of Molecular Diversity Measures in Natural Populations of Drosophila pseudoobscura and Drosophila persimilis by Jennifer Nicole Gredler University Program in Genetics and Genomics Department of Biology Duke University Date:_______________________ Approved: ___________________________ Mohamed Noor, Supervisor ___________________________ John Willis ___________________________ ...

Inducible anti-herbivore defenses in plants are predominantly regulated by jasmonic acid (JA). On tomato plants, most genotypes of the herbivorous generalist spider mite Tetranychus urticae induce JA defenses and perform poorly on it, whereas the Solanaceae specialist Tetranychus evansi, who suppresses JA defenses, performs well on it. We asked to which extent these spider mites and the predato...

OTWITHSTANDING their morphological similarity, Drosophila pseudoN obscura and Drosophila persimilis are distinct species. No hybrids between them have been recorded in natural populations, although the two species frequently occur together in the same habitats. Although in laboratory experiments species hybrids may be obtained without much difficulty, intraspecific matings succeed more easily t...