Arthropod Communities In Taiwan's Mango Orchards In Fujian Province

The composition and diversity of arthropod communities in mango orchards were investigated in Huian country, Fujian Province, China, from August 2006 to August 2007. The results are as follows:In total,145 arthropod species belonging to 15 orders,79 families of Insecta and Arachnoidea were collected from tree crown in mango orchard. Among them,76 species were pests(i.e.,52.41% of all species),42 species natural enemies(28.97%) and 41 species neutral insects(18.62%). Richness, abundance, diversity, evenness and concentration of total community and subcommunitys showed evidence of a seasonal dynamics. Their diversity indexes significantly and positively correlated to the species richness and evenness. The main dominant pests were Oligonychus mangiferus Rahman et Punjab and Scirtothrips dorsalis Hood, and the main dominant natural enemies were Stethorus siphonulus Kapur and Araneidae. The arthopods under tree crown included 203 species belonging 17 orders,80 families of Insecta and Arachnoidea, which were composed of 106 species of herbivores(i.e.,52.41% of all species),27 species of predators and parasitoids(13.30%),18 species of detritivores(8.87%) and 52 species of spiders(25.62%). The main dominant herbivores were Tropidothorax elegans Distant and Recilia dorsalis (Motschlsky), and the main dominant predators and parasitoids were Tetrastichus coccinellae Kurju-mov, and the main dominant detritivores were Tetramorium guineense Fabricius, and the main dominant spiders were Phintella sp.1.The arthropod components between two types of mango orchard, the interplant orchard and the non-interplant orchard, were also observed. The species richness and individual of total community and natural enemies in the interplant orchard were greater than that in the non-interplant orchard, but interplanting showed no significant effect on the other subcommunities. There were no significant differences on the characteristic indices of total community, herbivores, predators and parasitoids and spiders between the two types orchards. The individual and concentration index of detritivores in the interplant orchard increased obviously than that in the non-interplant orchard, evenness decreased. Species richness and diversity in the interplant orchard were equal to the non-interplant orchard.