International Journal of Horticulture, 2017, Vol.7, No. 9, 64-75
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Figure 1 Oviposition of C. maculatus exposed to different concentration of different parts of A.occidentale extracted by different
methods
Figure 2 Percentage adult emergence of maculatus exposed to the oil extract of different parts of A.occidentals
2.4 Damage and weight loss of cowpea seeds treated with different concentrations of different parts of
A.
occidentale
Figure 3 and Figure 4 respectively presented the damage and weight loss of cowpea seeds protected with different
concentrations of different parts of
A. occidentale
extracted by different methods. The damage and weight loss of
the cowpea seeds varied with the part of the plant, extraction method used and concentration of the extract. The
extracts statistically significantly reduced the damage and weight loss of the protected cowpea seeds at F=384.792,
df =48, 98; p < 0.0001 (damage) and F= 3592.567, df= 48, 98; p < 0.0001 (weight loss). Regardless of the plant
part used, the ethanolic extract of the plant significantly reduced or prevented the ability of the beetle to cause
damage and weight loss of the protected cowpea seeds. Furthermore, only the ethanolic extract of the nut at all
