Abstract The family Polymitarcyidae, with a worldwide distribution, includes mayflies large burrowing nymphs. South America harbors the highest diversity of this family, including subfamilies Asthenopodinae and Campsurinae. In work, three new species belonging to genera Tortopsis Tortopus (Campsurinae) are described based on adults nymphs from Colombia: toro sp. nov. , andaki coreguaje Addition...

a recently described species of dysdercus, named dysdercus stehliki schaefer, 2013 (hemiptera: heteroptera: pyrrhocoridae), found in viçosa, minas gerais state, brazil, feeds upon the seeds of fallen fruits of sterculia chicha a. st. hil. (malvales: sterculiaceae). the biology and immature stages’ descriptions of d. stehliki were assessed in two environments: laboratory and field. individuals o...

Chemical and biological insecticides have been frequently used in sugarcane fields to control insects-pests, including the borer, Diatraea saccharalis. Among products used, those based on chlorantraniliprole Metarhizium anisopliae entomopathogenic fungus, stand out. Euborellia annulipes is an insect of order Dermaptera considered a potential predator borer eggs. This study aimed evaluate direct...

For many insect species, group living provides physiological and behavioral beneÞts, including faster development. Bed bugs (Cimex lectularius L.) live in aggregations composed of eggs, nymphs, and adults of various ages. Our aim was to determine whether bed bug nymphs reared in groups develop faster than solitary nymphs.We reared Þrst instars either in isolation or in groups from hatching to a...

linguatula serrata, well known as tongue worm; is an aberrant cosmopolitan parasite, which inhabits the canine respiratory system (final host). the discharged eggs infect many plant feeder animals including human causing visceral and nasopharyngeal linguatulosis which is known as “marrara syndrome”. in current study, the prevalence of infection with l. serrata nymphs in mesenteric lymph nodes (...

We formulate a mathematical model for food collection and production of workers and nymphs in 2 species of mound building termites. We maximise the number of nymphs (reproductives) produced by each colony over its lifetime with respect to the proportion of eggs that hatch as nymphs as opposed to workers. The results predict that food storage has a very important influence on the pattern of nymp...

Endoparasitic Hymenoptera vary in the extent to which they provision their eggs and thus in the degree to which they appear to rely on their hosts for resources during embryonic development. In this study, developmental rates were examined in two congeneric parasitoid species, Encarsia formosa and E. pergandiella, that provision their eggs to different degrees. E. formosa eggs are much larger t...

cotton whitefly,  bemisia tabaci is considered as one of the most important pests of fall cucumber in khouzestan province. studies were conducted to examine the seasonal dynamics and spatial distribution of b.tabaci on fall cucumber during 2006 and 2007 in mollasani area. in both years, adult whiteflies first appeared on the plants in early september. in 2006 and 2007, mean maximum of adults oc...

The population phenology of Asian citrus psyllid, Diaphorina citri Kuwayama, was monitored weekly for 110 wk on two species of Citrus, kinnow mandarin and sweet orange, at two different research sites in Faisalabad, Punjab Pakistan. Citrus flush growth patterns were monitored and natural enemy surveys were conducted weekly. Flush patterns were similar for kinnow and sweet orange. However, flush...

Studies were conducted to assess population densities and phenology of the psyllid Diaphorina citri Kuwayama at two citrus groves in east-central Florida. One grove contained young, irrigated grapefruit trees and the other contained mature, nonirrigated orange trees. The two groves were sampled weekly for eggs, nymphs, and adults on flush shoots; for adults on mature leaves; and for adults capt...