Studies on the Nesting Behaviour and Control of the Graminivorous ant Messor galla Mayr (Hymenoptera: Formicidae) in Ilorin area of Nigeria.


Messor galla invaded parks and grounds at the University of Ilorin in 1994. This graminivorous ant constructs subterranean nests commonly on dark brown loamy sand soils on the lawns and elsewhere. Foraging for food and other materials are common in the dry season while nest clearing and minor duties are performed during rainy season. It is a diurnal insect with peak activities at noon when temperature is about 31.5 C, Trail lengths vary between 97 and 144 111 and the average nest crater measured 47.5 cm radius. Foraging activities also led to massive removal of planted grass wherever the nest occurs leading to economic loss apart from declining aesthetic values. Although, applications of Dieldrex 20 and Aldrex 40 gave little measure of control, Gammalin 20 proved best in the control of the ants.

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