To evalute the repellent action of botanicals on Sitophilus oryzae and Rhyzopertha dominica

Dr. Kusum Dang

To evalute the repellent action of botanicals on Sitophilus oryzae and Rhyzopertha dominica

author(s)
Dr. Kusum Dang

abstract
Enormous losses of grains takes place after harvest of food crops. Losses resulting form insect infestation are widespread and involve more than loss of quality. Insect infestation also causes a reduction in nutrients in grains. Laboratory studies were conducted to determine the repellency of botanicals on Rhyzopertha dominica and Sitophilus oryzae.

Eucalyptus sp and Mentha sp leaf extract were used for repellent action against Sitophilus oryzae. Experimental findings revealed that 71.66% of the test insects (Sitophilus oryzae) were repelled by 16μl of Eucalyptus leaf extract and 81.66% of the test insects (Sitophilus oryzae) were repelled by using 17.5 μl of Mentha sp leaf extract. In the present experiment with Calotropis procera leaf powder repellency percentage of Rhyzopertha dominica increased upto 80%, with Cassia fistula leaf powder repellency of R.dominica was observed 85% and with Lantana camera leaf powder repellency of R. dominica was observed upto 85%.

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