Abstract
The effects of crude oil pollution on the seedling and subsequent growth phases of Zea mays Var. F27, (Corn) Abeimoschus esculentus (Okro) and Capsicum frutescens (Pepper) were investigated. Zea mays seedlings and Capsicum plants were most susceptible to crude oil spillage at 31 m −2 . Mature Z. mays and Abelmoschus esculentus were fairly tolerant to crude oil doses of 31 m −2 and 61 m −2 . In the spraying experiments crude oil was found to be a potent contact herbicide. Z. mays and Abelmochus esculentus were completely destroyed in one or two weeks by death and maceration of vegetation or by defoliation. Capsicum frutescens rapidly recovered from defoliation with a flush of new leaves and branches 3 weeks after oil treatment. Among other factors, the phytotoxic, hydrophobic and other stress imposing properties of crude oil were suggested as causes of death to plants.
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