Detection by ELISA of predators of Prays oleae (Lepidoptera: Plutellidae) in a portuguese olive orchard

Over 900 predators were collected during two years from a Portuguese organic olive orchard, and tested in a serological bioassay for Prays oleae predation. The highest number of predators tested positive during the phyllophagous and antophagous generations of P. oleae. Ants were the most commonly found predators, followed by Coleoptera, Hemiptera and spiders

Effects of no tillage on the abundance and diversity of soil and olive tree canopy arthropods.

Soil tillage is a traditional practice in the olive groves of Trás-os-Montes region (Northeast of Portugal) where the soil is maintained without any vegetal cover. However, this agronomic practice may have dangerous environmental effects of several orders. In this way, with the present work we aimed to contribute for the knowledge about the effect of two soil management practices in the olive grove (traditional tillage in comparison to no tillage) on the arthropods abundance and diversity of the olive grove soil and the olive tree canopy with special reference to Formicidae family. The work was developed between April and October of 2004, in two continuous plots submitted to the following agronomical practices: one plot submitted to frequent tillage to control weeds, and the other plot was no tilled. Monthly, the soil fauna was evaluated by 30 pitfall traps and olive canopy fauna was monitored by the beating technique of 25 trees per plot. The recovered material was sorted and identified. The results showed the existence of a diverse and rich fauna associated to the soil of olive grove and olive tree canopy. The olive soil arthropods are constituted mainly by Formicidae and Collembola

Farelo de colza na alimentação de suínos em crescimento e terminação.

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Exigência de fósforo disponível para frangos de corte nas fases de crescimento e terminação.

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Determination of the Ileal Digestibility of Proteins and Amino Acids from Biscuit Bran and Wheat Gluten in Swine

To determine the apparent (AIDCP) and standardized (SIDCP) ileal digestibility coefficients of the protein and the apparent (AIDAA) and standardized (SIDAA) ileal digestibility coefficients of amino acids from biscuit bran and wheat gluten were used six castrated males swine in growth, on average weight from 22 to 60kg, with a T cannula on the terminal ileum, distributed in a randomized block design with three treatments, two periods and two repetitions per period. Each animal was considered a repeat. Treatments consisted of a protein free diet (PFD) for determination of the endogenous loss, PFD + biscuit bran (BB) and PFD + wheat gluten (WG). Each period lasted for six days, five days of adaptation of animals to the diet and 24 hours of collection of ileal digestion. The AIDCP of BB and WG were 82.33 and 90.07%, respectively and the SIDCP of BB and WG were 89.17% and 95.60%, respectively. The SIDAA were on average 80.84% (lysine), 83.94% (threonine), 90.57% (methionine + cystine) and 87.15% (valine) to BB. The SIDAA for the WG were on average 91.01% (lysine), 90.97% (threonine), 95.82% (methionine + cystine) and 90.04% (valine). The SID of protein and essential amino acids and non-essential elements identified in this study were on average, respectively, 89.17%, 88.54% and 89.20% of biscuit branand 95.60%, 93.71% and 89.20% of wheat gluten

Desempenho de frangos de corte (22 a 42 dias) alimentados com dietas peletizadas contendo glicerina bruta.

A maior parte das rações produzidas para frangos de corte no Brasil são peletizadas. Como benefício deste processamento observa-se melhora na digestibilidade dos nutrientes, redução de contaminações por patógenos, bem como melhorias nas condições de transporte. Existem muitos aditivos umectantes que podem ser utilizados para melhorar o processo de peletização, contudo a glicerina além de ser um umectante eficiente (1) é um alimento energético que tem grande potencial de produção no país. Assim sendo, objetivou-se avaliar o desempenho de frangos de corte na fase final (22 a 42 dias) alimentados com rações peletizadas ou fareladas com a inclusão de níveis crescentes de glicerina bruta

Uso do ferelo de arroz integral em dietas para frangos de corte.

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