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在室内条件下,对繁殖期云南切梢小蠹和横坑切梢小蠹的竞争展开了研究。在养虫笼中放入来源同株云南松的2根木段,同时放入2种小蠹,分别放入1种小蠹,观察小蠹对其繁殖材料云南松木段的选择。试验表明,横坑切梢小蠹喜在树皮厚的木段上繁殖,即云南松树干的下部,而云南切梢小蠹喜在树皮薄的木段上繁殖,即云南松树干的上部。从产卵到新成虫羽化,云南切梢小蠹的历期明显短于横坑切梢小蠹,分别为86～89 d和120～125 d。结论:在中国云南,云南切梢小蠹对云南松的攻击能力强于横坑切梢小蠹,后者更具次期性害虫特点。
Under indoor conditions, the competition between Pinus yunnanensis and Pinus taiwanensis in the breeding season was studied. In the feeding cage into the source of the same plant Yunnan pine two wood, at the same time into two kinds of small beetles, were placed in a small beetles, beetles its propagation material Yunnan pine section of choice. Experiments show that the cross-borer small Betula hi like to bark thick section of wood reproduction, that is, the lower part of the trunk of Yunnan pine, and the tip of the small Betula longiflorus in the tree bark thin hi wood reproduction, that is, the upper part of Yunnan pine trunk . From oviposition to emergence of new adults, the duration of the Pinctada funeralis was significantly shorter than that of the Pinotyna triticinae, 86-89 d and 120- 125 d, respectively. CONCLUSIONS: In Yunnan, China, T. mongolica has a stronger attacking ability against Pinus yunnanensis than P. xylostella, the latter being more perennial.