Influência de tricomas glandulares de Solanum berthaultii na predação de Scymnus (Pullus) argentinicus (Weise) (Coleoptera: Coccinellidae) em Myzus persicae (Sulzer) (Homoptera: Aphididae)

Repellency and toxicity of three Impatiens species (Balsaminaceae) extracts on Myzus persicae Sulzer (Homoptera: Aphididae)

The extracts of Impatiens noli-tangere, I. parviflora and I. glandulifera (Balsaminaceae) were evaluated for their effect on green peach aphid (Myzus perssicae), an important insect pest of many plants. All the extracts showed insecticidal and repellent activity. After 54 h of exposure, the most active extract was Impatiens parviflora with 99.7 and 90.0 % mortality at 0.5 and 0.1 % concentratio...

Temperature-dependent development and demography of Scymnus subvillosus (Coleoptera: Coccinellidae) reared on Hyalopterus pruni (Homoptera: Aphididae).

The development, survival, and fecundity of Scymnus subvillosus (Goeze) (Coleoptera: Coccinellidae) were studied at 20, 25, 30, and 35 degrees C, 60 +/- 5% RH, and a photoperiod of 16:8 (L:D) h (5,000 lux) under laboratory conditions. The total developmental time from egg hatch to adult eclosion ranged from 22.6 d at 20 degrees C to 10.6 d at 35 degrees C. The developmental rates of the egg sta...

Myzus persicae Sulzer aphid contains oxylipins that

Oxylipins are oxygenated fatty acids and their derivatives that play key roles in response to stress. They are widespread in many organisms including mammals or plants but are unknown in arthropods. In this study, we identified oxylipins in Myzys persicae Sulzer aphids reared on Vicia faba L. plants. Further experiments based on: (i) Radiolabelled substrate incubation with aphid extracts, and (...

Contribuição de Pesquisa entre Comunidades como um Indicador de Influência

In the context of information extraction, this paper proposes a new influence metric derived from bibliographic data. Specifically, the goal is to measure the degree of influence of researchers by evaluating the links between communities, which are formed by their publication venues. Each researcher has a base community where he/she presents greater influence. Then, when such researcher works o...

Reflexos das Alternâncias de Governo na Governança de TI em uma Organização de Economia Mista