Se realizó un estudio para conocer el consumo de alimento de Diaphania hyalinata (L.) (Lepidoptera; Pyralidae) en los cultivos de pepino (Cucumis sativus L.) y melón de agua (Citrullus lanatus Thunb.) así como el umbral económico y la señalización de esta plaga en organopónicos en el cultivo del pepino. Se establecieron sistemas de control de la misma para saber la efectividad técnica de los nematodos entomopatógenos Heterorhabditis indica cepa P2M y Heterorhabditis sp. cepas Ciap-Dey-6 y Ciap-CIAP-7, la bacteria entomopatógena Bacillus thuringiensis Berliner y el hongo Beauveria bassiana Bálsamo. El consumo de alimento en el estado larval de D. hyalinata resultó ser de 1,27 g en peso y 49,03 cmE2 en área para el melón y 1,14 g en peso y 50,33 cmE2 en área para el pepino. La cantidad de 2,5 larvas/planta es el umbral de daño económico en el cultivo sin cobertor y 5 larvas/planta en el cultivo con cobertor. La emisión de señales para productos químicos en pepino es cuando existen 2 larvas por planta en el cultivo sin cobertor y 4 en el cultivo con cobertor; para productos biológicos 1,5 larvas por planta en el cultivo sin cobertor y 3,5 larvas en el cultivo

Pós-Larvas do camarão Litopenaeus vannamei, na fase de PL9-10 e PL25-26 foram aclimatadas à água doce (0,0 ‰), objetivando promover cultivos em regiões interioranas. Para isso, foram realizados dois experimentos conduzidos em aquários com capacidade útil de 44 litros e densidade de estocagem de 11,36 pós-larvas/L. No experimento 1, foram testadas diferentes concentrações de cal hidratada (0,018 g a 0,031 g) e 2 dietas, formuladas à base de ração comercial para camarão e biomassa de artêmia. No experimento 2, foram testadas 5dietas com diferentes concentrações de biomassa de artêmia (0% a 100%), inseridas em rações de peixes e camarões. No final do processo de aclimatação, a sobrevivência das póslarvas variou de 40,44% a 98,04%. Concluiu-se que pós-larvas do Litopenaeus vannamei podem ser aclimatadas à água doce e que o aumento da concentração de cal e de artêmia na ração melhoraram significativamente (p<0,05) os parâmetros zootécnicos da espécie.<br><br>Litopenaeus vannamei postlarvae with 9-10 (PL9-10), 25-26 days old (PL25-26) were acclimated to freshwater (0 ppt) for the purpose of attending the inland cultures. Two experiments were conducted in 44 liter aquariums with stocking density of 11.36 postlarvae/L. In experiment 01, different concentrations of hydrated lime (0.018 g a 0.031 g) and two diets, formulated with commercial shrimp ration and artemia biomass, were tested. In experiment 02, five diets, withdifferent concentrations of artemia biomass (0 to 100%) inserted in fish and shrimp rations, were tested. At the end of the acclimatization process, the postlarvae survival varied from40.44 to 98.04%. Results showed that Litopenaeus vannamei postlarvae can be acclimated to freshwater. Also, the increase of lime concentration and the artemia biomass in the ration improved (p<0.05) the zootechnic parameters of the species in a significant way.

This method of producing energy has been done using a drainage pipe in order to provide small hydraulic. For the first time an experimental study was performed on the basis of the interdependence existing between the supplying pumping station and under the condition of the piezometry

Black Harco pullets were vaccinated at 5 weeks of age with a Malaysian V 4 HR (V 4 ) or Nigerian LaSota (LaSota) vaccine administered via eye drop (ED), drinking water (DW) or commercial feed (FD) and the antibody (Ab) levels in their sera were determined using haemagglutination inhibition test (HIT) at weekly intervals for 5 weeks (Wk). Determined also was the correlation between the Newcastle disease virus (NDV) Ab titre achieved with the two vaccines administered via the three routes. Protection from death following challenge with a virulent NDV Hert's 33/56 strain at 7 weeks of age was assessed. Immune response and protection was significantly better (P0.05) different from that of DW. Birds vaccinated with V 4 in FD were better protected (62.5%) than those vaccinated with LaSota in FD (11.1%). It was concluded that V 4 was more immunogenic and protective than LaSota and ED was the best route of administration of V 4, which was capable of protecting 62.5% of the birds vaccinated via commercial FD. Key words: Eye drop, feed, LaSota, Newcastle disease, V 4, water Bulletin of Animal Health and Production in Africa Vol. 54(2) 2006: 132-143