Abstract:
Short-horned grasshopper (Oxya Hyla Hyla) is a most important polyphagous insect
pest causing severe damage to crops. Pest control with synthetic insecticides is
dangerous. Botanical insecticides are natural chemicals extracted from plants with
insecticidal properties and used as an excellent alternative to synthetic pesticides.
The present study was performed on the insecticidal and repellent activities of
methanolic extracts of leaves of Calotropis gigantea, Syzygium aromaticum, Annona muricata, Datura metal, and Eucalyptus globulus at different
concentrations (1% and 3%). The percentage of mortality was recorded after 1, 2 and
3 days where the grasshoppers were treated with a topical application method. The
Annona muricata recorded a higher % mortality and lower % mortality was
recorded in Calotropis gigantea at both concentrations. The choice experiment
was done for the investigation of percentage repellency. Percentage repellency was
recorded for 60,120 and 180 minutes after treatment. The Syzygium aromaticum
was recorded 100% of repellency at both concentrations.
