Thesis Abstract of AGS Students
Insect species diversity in monoculture and mixed culture of mungbean-upland rice, mungbean-corn, mungbean-sesame and mungbean-sorghum
Wel Y. Ksor (1994)
The impact of mungbean conventional monoculture and mungbean mixed with upland rice, corn, sesame or sorghum on the diversity of arthropod species was studied. Field investigation was conducted at the Experimental Farm of Multiple Cropping Center, Chiang Mai University. Mungbean mixed cultures showed the tendency to support more diversity of insect species, natural enemies established and remained in mixed culture than on mungbean in monoculture.
Population densities of Ophiomyia phaseoli Tyron, Nezara viridula Linneaus were significantly greater on mungbean in pure than those on mungbean in mixed stands. Natural enemies were more abundant in mixed culture than on mungbean in monoculture. The generalist predators, Monochelus sexmacultus Fabricius, Micraspis discolor Fabricius and Phidipus sp. exhibited greater densities on intercropped mungbean. Due to greater heterogeneity and complexity, the species richness and evenness tended to be higher in mungbean mixed culture.
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