the diamondback moth, plutella xylostella (l.) (lep.: plutellidae) is one of the most destructive insectpests of cruciferous crops throughout the world. in this research, the demographic parameters of p. xylostellawere studied on five rapeseed cultivars including licord, modena, okapi, rgsoo3 and regxkobra. theexperiments were conducted in a growth chamber at temperature of 25 â± 1â°c, 60 â± 5%...

Utilization of a novel plant host by herbivorous insects requires coordination of numerous physiological and behavioral adaptations in both larvae and adults. The recent host range expansion of the crucifer-specialist diamondback moth (DBM), Plutella xylostella L. (Lepidoptera: Plutellidae), to the sugar pea crop in Kenya provides an opportunity to study this process in action. Previous studies...

plant extracts, like phytoecdysteroids, are currently studied because of the possibility of their use in plant protection. phytoecdysteroids are insect steroid hormone analogues, and they are believed to deter invertebrates from plants, either by acting as antifeedants or by being toxic through hormonal disruption on ingestion. we describe here the effects of extract from spinacia oleracea l. (...

To develop effective insecticides against Lepidoptera pests, 25 novel N-pyridylpyrazole derivatives containing thiazole moiety were designed and synthesized based on the intermediate derivatization method (IDM). The insecticidal activities of these target compounds Plutella xylostella (P. xylostella), Spodoptera exigua (S. exigua), frugiperda frugiperda) evaluated. Bioassays indicated that comp...

In this study, in order to find novel biologically active pyrazole oxime compounds, a series of pyrazole oxime derivatives containing a 5-trifluoromethylpyridyl moiety were synthesized. Preliminary bioassays indicated that most title compounds were found to display good to excellent acaricidal activity against Tetranychus cinnabarinus at a concentration of 200 μg/mL, and some designed compounds...

To better understand the predator-prey relationship and to compare predation rates, we studied the life table and predation rate of the predator Eocanthecona furcellata Wolff (Hemiptera: Pentatomidae) when reared on two major crucifer pests, Spodoptera litura (F.) (Lepidoptera: Noctuidae) and Plutella xylostella L. (Lepidoptera: Plutellidae). The net reproductive rate, intrinsic rate of increas...

We report the occurrence of natural enemies of Plutella xylostela (L.) in organically farmed kale in Pernambuco, Brazil. Seven natural enemies were observed parasitizing or preying on larvae and pupae of P. xylostella--three parasitoids: Cotesia plutellae Kurdjumov (Hym.: Braconidae), Conura pseudofulvovariegata (Becker) (Hym.: Chalcididae) and Tetrastichus howardi (Olliff) (Hym.: Eulophidae), ...

the diamondback moth, plutella xylostella (l.) is a serious and economically important pest of cruciferous crops worldwide. the nutritional indices of this pest on four host plants including two canola (slm046 and rgs003) and two cabbage cultivars (green-cornet and glob-master) were determined under laboratory conditions (25 ± 0.5 °c, 65 ± 5% rh and 16: 8 l: d h). the highest relative consumpti...