Abstract

The insecticidal properties of foliage's powder of Peumus boldus Molina against adults and immature S. zeamais were evaluated. The highest toxicity in contact and fumigant activity was reached by concentrations upper to 1.25% showing mortality over to 90%. The treatments with high mortality showed a lower adult insect emergence (F-1) and grain weight loss too. In immature S. zeamais control lower F-1 was observed in highest concentrations of powder. The storage of powder under refrigerated conditions not prevents the insecticidal properties lost. All evaluated concentrations exhibited repellent activity against S. zeamais adults. The powder of P. boldus does not affect the grain germination. We concluded that powder of P. boldus has promissory perspectives to stored products pests control.