云斑白条天牛产卵刻槽在美国山核桃树干上的分布

Distribution of oviposition nidi of Batocera lineolata in Carya illinoensis trunks

对样树的调查结果表明：1～3a生美国山核桃幼树无云斑白条天牛产卵刻槽，4a生以上植株，云斑白条天牛产卵刻槽垂直分布位置随树龄的增大而逐年上移，其中，在4～13a生树上，主要分布在离地50cm以下。树皮厚度是影响产卵刻槽垂直分布变化及产生空槽的主要因子。

The vertical distribution of oviposition nidi on the trunks of Carya illinoensis caused by Batocera lineolata was studied. The results showed that there was no oviposition nidus in C. illinoensis trees of 1-3 years old. For the trees over 4 years old, the oviposition nidi in the trunks moved up with the increase of tree ages and for the trees at the ages between 4-13 years ,they mainly distributed on the trunks at the height below 50 cm. The bark thickness was the main factor influencing the vertical distribution of oviposition nidi and formation of empty nidi.