Songa, J. M.; Jiang, N.; Schulthess, F.; Omwega, C.
(Blackwell Verlag, Berlin, 2007)
The effects of mixed cropping systems containing maize, sorghum, millet and beans on infestations of cereals by lepidopteran stemborers and on associated parasitoids, as well as on yields and land equivalent ratios (LER) ...