1. Pea aphids (Acyrthosiphon pisum Harris; Hemiptera: Aphididae) exhibit transgenerational wing polyphenism, in which unwinged females produce genetically identical winged offspring in response to environmental cues such as overcrowding and predation risk that indicate poor habitat quality. 2. Laboratory experiments were carried out to explore the intensity of the wing polyphenic response of pe...

We evaluated the attraction of Monochamus alternatus Hope (Coleoptera: Cerambycidae), Dryocoetes luteus Blandford and Orthotomicus erosus Wollaston (Coleoptera: Curculionidae: Scolytinae) to multiple-funnel traps baited with the pine volatiles, ethanol and (+)-α-pinene and the bark beetle pheromones, ipsenol and ipsdienol. M. alternatus were attracted to traps baited with ethanol and (+)-α-pine...

Prepupae of Hypera eximia (LeConte) (Coleoptera: Curculionidae), a natural host, and prepupae of factitious insect hosts were tested for their physiological responses to stinging by the gregarious ectoparasite, Necremnus breviramulus Gahan (Hymenoptera: Eulophidae), and to injection with an extract of the venom gland tissue dissected from the lower reproductive tract of the female parasite. The...

1. Pea aphids (Acyrthosiphon pisum Harris; Hemiptera: Aphididae) exhibit transgenerational wing polyphenism, in which unwinged females produce genetically identical winged offspring in response to environmental cues such as overcrowding and predation risk that indicate poor habitat quality. 2. Laboratory experiments were carried out to explore the intensity of the wing polyphenic response of pe...

Multiple-funnel traps baited with exo-brevicomin and a mixture of cisand transverbenol were used to test the relative attractiveness #If myrcene and (-)-a-pinene to the mountain pine beetle, Dendroctonus ponderosae Hopkins, in a s tand of western white pine, Pinus mont icola Doug]. Traps baited with myrcene caught significantly more D. ponderosae than traps baited with (-)-a-pinene, irrespectiv...

We determined the food habit of the Asian parti-coloured bat Vespertilio sinensis from May to August by analysing their faecal samples. Eight orders of insects were identified in the faeces. Lepidoptera, Diptera and Coleoptera had high frequencies of occurrence, but the proportion of each order varied with the sampling period. A comparison between diet composition and relative insect abundance ...

The vertical distribution of insects was studied in deciduous forests the temperate zone (the center European Russia). During research, 81342 individuals from 10 insect orders (Dermaptera, Blattodea, Hemiptera, Hymenoptera, Coleoptera, Neuroptera, Trichoptera, Lepidoptera, Diptera, Mecoptera) were collected. Lepidoptera and Coleoptera most numerous. total number Diptera higher at an altitude 1....

A survey on the click beetles (Coleoptera, Elateridae) in province of Kurdistan (Iran), with three new records for Iranian fauna

We evaluated the efÞcacy of the systemic insecticides dinotefuran, emamectin benzoate, Þpronil, and imidacloprid for preventing attacks and brood production of southern pine engraver beetles (Coleoptera: Curculionidae: Scolytinae) and wood borers (Coleoptera: Cerambycidae) on standing, stressed trees and bolt sections of loblolly pine, Pinus taeda L., in eastern Texas. Emamectinbenzoate signiÞc...