the beet armyworm, spodoptera exigua, is one of the most important pests of sugar beet in iran. the aim of this study was to determine the effect of water and nitrogen treatments of sugar beet planton developmental time and fecundity life table parameters of the pest. an experiment was carried out under laboratory conditions (25±2oc, 70±5% r.h. and 12l: 12d) on larvae reared on sugar beet leave...

Background: Previous genetic evidence suggested that the C. elegans TGF-b Dauer pathway is responsible solely for the regulation of dauer formation, with no role in longevity regulation, whereas the insulin/IGF-1 signaling (IIS) pathway regulates both dauer formation and longevity. Results: We have uncovered a significant longevity-regulating activity by the TGF-b Dauer pathway that is masked b...

the russian wheat aphid (rwa), diuraphis noxia has been known as a major pest of small grains, particularly wheat, worldwide. this study evaluated the biological responses of rwa to six wheat cultivars including yavarus, pishgam, aadl, omid, darab 2 and sepahan. the experiment was conducted under greenhouse conditions of 25 ± 2 °c, 55 ± 10 % r. h. and a photoperiod of 16:8 (l: d) h. resistance ...

the biology of chrysocharis pentheus (walker) (hymenoptera: eulophidae), the most abundant endoparasitoid of phyllocnistis citrella stainton (lepidoptera: gracillariidae) in ehime prefecture, japan, was studied under laboratory and field conditions. the mean immature developmental time and adult longevity at different temperatures (22 to 31°c) under 50-70% rh decreased as the temperature increa...

spodoptera exigua (hübner) was studied in laboratory (25±1ºc, 60±5% rh, and 16:8 l:d h) exploring the antibiotic effects of 10 canola cultivars (sarigol, slm046, hayula420, rgs003, opera, okapi, licord, modena, zarfam and talaye) on its demographic parameters. the age-stage, two-sex and the traditional female age-specific life tables were constructed by using the demographic data. the larval pe...

Environ. Entomol. 20(6): 1653-1658 (1991) ABSTRACT It was hypothesized that the northward spread of the eucalyptus longhorned borer, Phoracantha semipunctata F., in California is limited by winter temperature conditions. The cold tolerance of prepupal stages was tested by exposing infested logs to cold temperature treatments of -5, 0, +5, and + lO"C for periods of 1, 3, 7, and 30 d. Temperature...

sugarcane mite, oligonychus sacchari mcgregor, is one of the most important pests of sugarcane plant in khuzestan province, southwest of iran. during a two-year study (2007-2008), the biology of the sugarcane mite, o. sacchari, was investigated on three commercial varieties cp48-103, cp57-614 and cp69-1062 under laboratory conditions (temperature 30±1° c, rh% 60±5 and a photoperiod of 16:8 (l:d...

Because of the longevity of children diagnosed with chronic illness, many adult institutions are now seeing an influx of adolescents with chronic illnesses. An urgent need exists to educate adult care nurses on adolescent development, childhood chronic illness, and techniques to guide young adult patients through illness and hospitalization.This article describes the development of an education...