| Arbela spp.is a kind of trunk borer influencing severely plantation quality and stability in South China Attacks of Arbela spp. in young plantation of 20 indigenous broad leaved tree species were investigated, and relationship between damage and tree growth were analyzed in Dongjiang State Forest Farm, Guangdong Province. The results showed that 5 tree species including. Betula alnoidas, Ormosia pinnata, Elaeocarpus sylvestris, Potentilla fulgens, Evodia glabrifolia, were damaged by Arbela spp. when 7 years old, while one more species, Bischofia javanica was damaged when 8 years old There were significant differences of growth performance (P<0.05) among these 6 tree species, while growth performance did not differ remarkably between damaged and non damaged individuals (P> 0.05). Height distribution of borer attacks were different among these tree species, borer attacks mostly occurred under crown for fast. growing tree species such as B. alnoidas and P. fulgens; the borer concentrated in the lower edge of canopy for medium growing tree species like O pinnata; and the borers occurred in upper part of the lower canopy edge for E. sylvestris, and under or in upper part of the lower canopy edge for two slow growing tree species E. glabrifolia and B. javanica respectively Therefore, height under branch could be the main reference index to analyze borer height distribution on tree. The results complement the information about.Arbela spp occurrence and damage characteristic, and provide some evidences for tree species selection in establishment of mixed plantation. |
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