| influence of different rice cultivars on schizotetranychus oryzae development. | schizotetranychus oryzae rossi de simons (acari: tetranychidae) is considered one of the most important phytophagous mite in rice cultivation in the americas south, central, and north. this study aimed to examine some biological aspects of s. oryzae developing on leaves of three different cultivars of rice [oryza sativa (l.)-poaceae] produced in the state of rio grande do sul, brasil. the plants were kept in a room at 25 ± 1°c, with natural light (photophase of approximately 14 h) and 70 ± 5% re ... | 2017 | 27832463 |
| soil quality assessment in rice production systems: establishing a minimum data set. | soil quality, as a measure of the soil's capacity to function, can be assessed by indicators based on physical, chemical, and biological properties. here we report on the assessment of soil quality in 21 rice (oryza sativa) fields under three rice production systems (semi-direct, pre-germinated, and conventional) on four soil textural classes in the camaquã region of rio grande do sul, brazil. the objectives of our study were: (i) to identify soil quality indicators that discriminate both manage ... | 2008 | 18396549 |