The aim of this study was to determine the damage in Brachiaria ruziziensis (Germain & Edvard) according to the density of and exposure time to adults of Mahanarva spectabilis (Distant, 1909) (Hemiptera:Cercopidae). Each plant was kept with 0, 12, 18, or 24 adults of M. spectabilis for five or ten days. Then, the insects were removed from the plant, and the following parameters were evaluated: ...

The characterization of legume proteases contributes to the understanding of the physiology of plants and their interaction with the environment. Thirteen extracts from various parts of Crotalaria spectabilis were made using different extraction systems. The highest protein content was found in seeds, and the most pronounced proteolytic activity was observed in leaf extracts, with an optimal pH...

Bougainvillea spectabilis (Family: Nyctaginaceae), commonly referred to as Great Bougainvillea or Paper Flower, is one of the traditional medicinal plants with potential antifertility activity. The aqueous extract and decoction of this plant have been used as fertility control among the tribal people in many countries. Furthermore, it has been shown to possess anticancer, antidiabetic, antihepa...

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We describe the catastrophic decline of a species of keystone rodent at a Chihuahuan Desert site. The population density of Dipodomys spectabilis averaged 7.6 individualslha from 1977 to 1983, but declined to near extinction over the winter of 1983-1984. We propose hypotheses to explain this decline: 1 ) disease; 2) damage to seed stores by heavy precipitation; 3) contamination of seed stores b...

Spittlebugs are the leading cause of damage to tall grasses. Annual losses are estimated to reach 2.1 billion dollars in sugarcane crops and grazing land throughout the world. Correct identification of these species is difficult due to similarities in color, body size and male genitalia. Molecular markers have been useful in the identification and assessment of genetic diversity of many species...

The spittlebugs Mahanarva spectabilis economically challenges cattle production of neotropical regions, due to its voracious feeding on tropical grasses. Here, we evaluated biochemical responses the interaction between M. and widely cultivated grasses Brachiaria spp. (i.e., brizantha decumbens) elephant (cvs. Roxo de Botucatu Pioneiro), regarding lipoxygenases, protease inhibitors, phytohormone...

O padrão de fragmentação de uma série homóloga de alcalóides piperidínicos isolados de Senna spectabilis foi investigado utilizando-se espectrometria de massas tandem com ionização por electrospray (ESI-EM/EM). A análise dos extratos EtOH e frações das flores e dos frutos de S. spectabilis por ESI-EM e ESI-EM/EM permitiu elucidar a estrutura de quatro componentes pertencentes a uma série homólo...