Sylvio Péllico Netto

Bioatividade de óleos essenciais de sassafrás e eucalipto em cascudinho

This research aimed to evaluate the sassafras (Ocotea odorifera) and eucalyptus (Eucalyptus viminalis) essential oils on the control of larvae and adults of lesser mealworm (Alphitobius diaperinus), comparing their insecticide potential. The essential oils were produced through water vapor extraction in a semi industrial scale. Contaminated paper filter technique was applied to evaluate the insect mortality. In the current experiment twelve concentrations were included for evaluation and among them one control (solvent) in order to settle the mortality rate and LC50 of the two tested essential oils. The larvae were more susceptible then the adults to sassafras essential oil exposure and less susceptible than the adults, when exposed to eucalypt essential oil. Larvae as well as adults of A. diaperinus were more susceptible to the sassafras (LC50 adults 0.26mL l-1 and larvae 0.12mL l-1) than the eucalyptus essential oil (LC50 adults 1.37mL l-1 and larvae 1.72mL l-1), by contact intoxication (Ocotea odorifera: Larvae y=3,3916+1,4699logx; Adult y=0,9486+2,8576logx; e Eucaliptus viminalis: Larvae y=1,3643+1,6254logx; Adult y=1,4487+1,6623logx). It is concluded that the essential oils of sassafras and eucalyptus can be used to control lesser mealworm and used as a new integrated strategy for management of this pest.

Conservacionismo privado: Vivat Floresta Sistemas Ecológicos, um modelo integrativo da PUCPR e da Instituição Filantrópica Sergius Erdelyi

A mais importante concepcao sobre conservacionismo no mundo tem seu embasamento no Novo Testamento: A Natureza e Bela e Util. A natureza bela e, sem duvida, o resultado da perfeicao da obra divina e a natureza util ao homem e onde ele conseguiu fisicamente sua sobrevivencia e inspiracao para louvar o Criador. Esta concepcao perpassou toda a Idade Media e permaneceu dominante ate o seculo XIX. Em tempos mais recentes, com o acelerado crescimento populacional no mundo e tambem com o advento da revolucao industrial, acentuou-se a destruicao da natureza. Com os avancos cientificos foi possivel evidenciar com clareza o surgimento dos disturbios provocados pela intensiva acao antropica. A natureza, na concepcao filosofica e cientifica moderna, havia atingido um limite de sua utilizacao pelo homem e precisava ser questionado no que concerne o seu poder ilimitado sobre eles. Foi por meio de uma intensa articulacao de politicas publicas, que se organizou no mundo a estrutura das unidades de conservacao. O novo movimento conservacionista deve considerar, fundamentalmente, que a maioria dos recursos naturais remanescentes, esta sob o dominio privado, razao pela qual a sociedade deve ser conscientizada da importância da conservacao privada. O Vivat Floresta Sistemas Ecologicos e apresentado como exemplo de conservacionismo privado.

APPLICATION OF THE WEBER DISTRIBUTION TO THE GREEN PINE CONES WEIGHT

The objective of the present work was to verify the efficiency of the Weber Distribution, when applied to the weight of pine cones. Forty green pine cones were collected and weighed in the Metropolitan Region of Curitiba. The weights were distributed into 6 classes, with 90 gram interval. It is concluded that the Weber Distribution adjusted to the data, in accordance with the Kolmogorov-Smirnov Test. The expected values for the adjusted distribution, average and mode had resulted in values close to the observed ones, showing that the developed expressions are efficient. The facility to adjust the proposed model, and the calculation of the average, variance, standard deviation and inflection points, by means of the developed expressions, are advantages of this distribution. Due to its flexibility, it is possible to affirm that this model can be applied to several forest distributions, as well as to other biological data.