Year: 2018, Issue: June
Bioefficacy of Achyranthes aspera against red cotton bug Dysdercus cingulatus Fab.
(Hemiptera : Pyrrhocoridae).
A. B. Pardeshi and M. G. Gadewad
Dysdercus cingulatus, Achyranthes aspera, Mortality.
Bioefficacy of methanol and ethyl acetate leaves extract of Achyranthes aspera were studied against Dysdercus cingulatus. The plant leaves were dried, powdered and extracted in soxhlet apparatus in methanol and ethyl acetate solvent for 24 hrs. The adult red cotton bug, D.cingulatus were exposed to methanol and ethyl acetate plant extract of Achyranthes aspera and percent mortality were recorded after 96 hrs. The insecticidal activity of leaves extract of Achyranthes aspera LD = 2.300 μg/gm, LD = 8.395 μg/gm, LD = 13.71 μg/gm, LD =15.63 μg/mg in methanol 10 50 90 99 and LD =1.279 μg/gm, LD = 5.009 μg/gm, LD =13.38 μg/gm, LD =15.05 μg/gm in ethyl acetate respectively. Results 10 50 90 99 revealed that the mortality increase with increase in concentration of the plant extract. The ethyl acetate solvent extract showed more insecticidal property against Dysdercus cingulatus. Regression equations, statical variance, standard error and 95% confidence limits are presented.