Effects Of Three Flowering Plant Regulation Modes On The Structure Of Pest-natural Enemy Communities In Tea Garden

Increasing the biodiversity of agroecosystems can increase the number of natural enemies useful for pest control.Large monocultures of tea trees in tea plantations make species diversity low,which is not conducive to maintaining ecosystem functions and services,and natural enemies cannot survive in a monocrop environment without shelter or food sources.In this study we planted three types of flowering plants,peacockweed,marigold,and perilla,in separate plots of tea gardens with extended flowering periods,and established three regulation patterns of wraparound planting,strip planting,and checkerboard planting,respectively.The number of predatory natural enemies and parasitic wasps were significantly higher in the peacock grass and marigold plots than in the control plots,especially during the peak flowering period,but the number of natural enemies in the perilla plots was not significantly different from the control.The community characteristics indices of the flowering plant sample plots: species richness,diversity index and evenness index were significantly higher than those of the non-flowering control tea plantation,and the dominance concentration index of pests in the control tea plantation was significantly higher than that in the plots planted with flowering plants.The food web relationship in the tea garden ecosystem was complex and the degree of interspecific constraints was greater after the planting of show flowering plants.All stability indices in the tessellated planting control model of marigold were significantly higher than those in other treatment areas,and the natural enemy community was actively optimized to increase the system’s ability to resist external disturbances.The pestnatural enemy community showed a strong correlation in the tessellation control model of flowering plants.Our study shows that tessellated planting of flowering plants in tea tree systems can increase insect biodiversity as well as the number of natural enemies in the ecosystem,and the temporal combination of different flowering plants can provide effective control for tea tree pest management and provide an option for sustainable pest control in tea trees.