Cell physiology in the weevil Sitophilus oryzae is coordinated by three integrated genomes: nuclear, mitochondrial, and the "S. oryzae principal endosymbiont" (SOPE). SOPE, a cytoplasmic bacterium (2 x 10(3) bacteria per specialized bacteriocyte cell and 3 x 10(6) bacteria per weevil) that belongs to the proteobacteria gamma3-subgroup, is present in all weevils studied. We discovered a fourth p...

The insecticidal pyrazole ethiprole, applied at rates of 7.5 and 10.0 ppm either alone or in combination treatments with deltamethrin, piperonyl butoxide, and chlorpyrifos-methyl, was evaluated as a protectant of stored wheat and stored corn. The commodities were treated with six treatment combinations, including an untreated control, and held for 6 mo at 22, 27, or 32 degrees C and 57% RH. Bio...

O uso de inseticidas sintéticos no manejo Sitophilus zeamais tem causado problemas, como a seleção insetos resistentes, tornando desejável busca por estratégias controle menos agressivas. Simarouba versicolor é uma planta nativa do Brasil, com propriedades inseticidas. Devido à ausência informações sobre ação S. em pragas grãos armazenados, foi avaliado o efeito adultos zeamais. letal pela expo...

Sitophilus zeamais causes significant losses to maize produce worldwide. The use of biodegradable and environmentally friendly botanicals as an alternative synthetic pesticides is increasingly becoming important. Therefore, we sought determine the plant extract formulations manage S. during storage. Crude Zanthroxylum usambarense Warburgia ugandensis stembark extracts were used for contact toxi...

Maize weevil is a major pest of stored maize grains in many regions the world including Nigeria. A laboratory investigation was conducted to assess potency Ocimum gratissimum leaves for Sitophilus zeamais control. O. powder used ethanolic extract preparation by soaking 300g dry powdered plant material 1.5 litres ethanol 24 hours at room temperature with continuous stirring 10 minutes. The teste...

Alternative methods of control against different parasites affecting livestock and agriculture are currently being sought. The essential oil Peumus boldus Molina has anthelmintic insecticidal activity the nematode Haemonchus contortus stored cereal insect pests. present study aimed to assess in vitro P. H. (L3) unsheathed Sitophilus zeamais, Tribolium castaneum, Plodia interpunctella. was obtai...