This study was conducted to assess the prevention of egg laying and the inhibition of the emergence of the cat flea (Ctenocephalides felis) resulting from the application of a combination of fipronil and permethrin (Frontline Tri-Act®/Frontect®, Merial) on dogs. Sixteen healthy dogs were included after pre-treatment live flea counts and randomly allocated to two groups. Eight dogs served as unt...

We investigated male mate choice and mating competency in the common bed bug, Cimex lectularius L., using video tracking for 10 min per experiment. In the male mate choice experiment, when a male was placed with two females of different mating status, males preferred to initiate copulation with the virgin female more quickly than with the mated female, and the mean total copulation duration wit...

To investigate whether circadian clocks in fruit flies Drosophila melanogaster evolve as a consequence of selection on the timing of adult emergence, we raised four replicate populations each of early (early(1..4)) and late (late(1..4)) emerging flies by selecting for adults that emerged during the morning and the evening hours. We estimated the percentage of flies that emerged during the two s...

Since the ability to time rhythmic behaviours in accordance with cyclic environments is likely to confer adaptive advantage to organisms, the underlying clocks are believed to be selected for stability in timekeeping over evolutionary time scales. Here we report the results of a study aimed at assessing fitness consequences of a long-term laboratory selection for tighter circadian organisation ...

This study assessed the effects of refrigerated storage on the suitability of eggs of the glassy-winged sharpshooter, Homalodisca coagulata (Say) (Hemiptera: Cicadellidae), as hosts for propagation of the parasitoid Gonatocerus ashmeadi Girault (Hymenoptera: Mymaridae). Development of the host eggs was terminated by chilling at 2 degrees C for 5 d before storage was initiated at 10 degresC for ...

introduction : infections in neutropenic patients are considered as major causes of mortality and emergence of drug resistant gram positive bacterial infections are crucially important to be covered if indicated. vancomycin is active against most gram positive bacteria including methicillin resistant staphylococcus aureus (mrsa). in this study, we evaluated the appropriate utilization of this a...

Thedevelopment, fecundity, and life tableparameters ofGonatocerus ashmeadiGirault, an egg parasitoid of the glassy-winged sharpshooter,Homalodisca coagulata (Say), were studied in the laboratory at six constant temperatures between 12 and 32 C. At 12 C, the parasitoid failed to develop beyond the third instar, and durations of the egg stage and the Þrst and second instarswere prolonged. Develop...

The parasitoid Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) is often released to manage lepidopteran pests in cotton crops. However, growers rely on multiple insecticide applications pests. A harmonious integration of control tactics required for proper pest management, and the use selective insecticides (i.e., those promoting effective while causing little impact natural enemi...