Seasonal dynamics of bean aphids and its relationship with the abundance of Lady Bird Beetles

The seasonal dynamics of aphid Aphis craccivora Koch (Hemiptera: Aphididae) on four bean species namely country Lablab purpureus, yard long Vigna sesquipedalis, hyacinth Dolichos lablab and bush Phaseolus vulgaris were studied from September to December 2017 in the experimental field Department Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur, Bangladesh. study also investigated relationship between abundance its predatory insect lady bird beetle. Aphid showed increasing trend 4th week reached peak during 2nd November then declined. Bush bean, respectively depicted higher lower abundances throughout study. Relationship beetle positively correlated. negatively correlation with temperature rainfall, positive relative humidity, correlations not significant. Multiple regression equation that had highest effect which contributed 16.1 - 19.2% role population aphid.
 Bangladesh J. Zool. 48(2): 357-363, 2020