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Insects are a problem in stored grain throughout the world because they reduce the quantity and quality
of grain. The present investigation was aimed to assess the impact of indigenous plants for their
insecticidal and repellent activity against Periplanata americana. So, an attempt is undertaken to
evaluate the efficiency of various plant powders of the plants viz. Neem, Tulsi, Adathoda, Turmeric,
lantana etc., owing to its insecticidal properties.Studies were carried out on the repellency of the plant
powders of six botanicals on Periplanata americana. The tested plants include Azadirachta indica,
Curcuma longa, Lantana camara, Vitex negundo, Adhatoda vasica, Ocimum tenuiflorum. Each of the
plant material (PM) was pulverized and then applied on the insect in four different doses.The dosage rate
were 25%PM+75% biscuit, 50% PM+ 50% biscuit, 75% PM+ 25%biscuit and 100% PM + 0% biscuit.
Repellency of insect was monitored and recorded on 1,6 and 24 hours duration and by statistically
calculating mean, excess proportion index (EPI) and percentage of repellency. All the experimented six
plants showed maximum repellency and high EPI value in highest dose.
Keywords: Repellency, attractancy, EPI, Pests, Biopesticides.