Abstract
A field experiment involving aphid-free control and nutrient-stressed plants of 5 maize (Zea mays L.) genotypes was conducted to determine if predaceous aphidophaga use plant cues, such as colour, to select plants on which to forage. Nutrient stress resulted in plants lighter in colour (Yellow) than control plants in all the maize genotypes. Coccinellids were significantly more abundant on yellow plants than on greener control plants whereas chrysopids were significantly more numerous on controls in 3 out of 5 maize genotypes. These two groups of predators may use plant colour to partition habitat spatially and exploit their aphid prey while minimizing intraguild interactions.
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