The medicinal potentials of plants have been documented. This study evaluated the capacity of the leaf of Justicia flava methanolic extract (JFME) to alter the biochemical distortions initiated by feeding on diet containing crude oil. Male Wistar albino rats, thirty six, were constituted into nine groups. Each group had six rats. Group 1 had untreated feed. Groups 2 to 4 had untreated feed but were given 100 mg, 200 mg and 300 mg/ kg b.wt of JFME, respectively. Group 5 had untreated feed and given 200 mg/kg b.wt of ascorbic acid as standard. Group 6 was fed with diet containing crude oil (4ml/100g v/w). Groups 7 to 9 were given contaminated feed and 100 mg, 200 mg and 300 mg/ kg b.wt of JFME, respectively. The rats were maintained on these treatments for thirty days and had water ad libitum. Thereafter exposure period, lipid profile, hematological and inflammatory markers in the blood were analyzed using standard methods. Petroleum in feed altered the lipid profile, hematological and inflammatory markers compared to values in positive control rats. However, treatment of the rats with JFME had a positive reversal of these markers close to values in control rats; which compared favorably with ascorbic acid, used as standard. This investigation discovered JFME as a candidate for managing crude oil- imposed health issues.

The ameliorative potential of maize husk on crude oil impacted soil had been documented. The aim of this study was to evaluate the effect of maize husk treatment of crude oil contaminated soil on morphological and biochemical indices of cowpea seedlings. Treatment of soil with maize husk significantly (p< 0.05) increased the morphological and biochemical indices comparable to control seedlings. On the other hand, exposure of cowpea seedlings to crude oil-contaminated soil caused significant (p< 0.05) decreases in both morphological and biochemical indices compare to values in control seedlings. However, these values were restored close to control values   by treatment of crude oil-contaminated with maize husk. The treatment of soil with maize husk caused improvement of morphological parameters and alteration of biochemical indices of cowpea seedlings grown in uncontaminated and crude oil-contaminated soils. This has affirmed the use of maize husk as possible soil conditioner.