Toxicity of plant extracts against looper caterpillar, Buzura suppressaria Guen. (Lepidoptera: Geometridae).

摘要

Studies on effect of plant extracts against looper caterpillar, Buzura suppressaria [Biston suppressaria], were carried out in the laboratory. In the first set of experiments, caterpillars were exposed to the extract-treated filter papers. All the extracts were found toxic to the caterpillars. However, the highest mortality was recorded with the chloroform extracts of Polygonum hydropiper and Pogostemon parviflorus [Pogostemon benghalensis], causing 100% and 83.33% mortality, respectively, at 2.0% concentration. In the second set of experiments, the treated alternate host plants with most effective plant extracts were better in comparison to control to save the damage caused by the caterpillars. No feeding marks were there on the bunch of Indigofera teysmannii treated with the chloroform extracts of Polygonum hydropiper and Pogostemon parviflorus at 2.0% concentration.