Sánchez-Martínez Guillermo, Wagner Michael R
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Campo Experimental Pabellón, Km. 32.5 Carr. Ags.-Zac., Pabellón de Arteaga, Ags. C.P. 20660, Mexico.
Environ Entomol. 2009 Aug;38(4):1197-204. doi: 10.1603/022.038.0429.
Pine seedlings and saplings are seldom attacked by bark beetles of the genus Dendroctonus. However, Dendroctonus rhizophagus (Coleoptera: Curculionidae: Scolytinae) Thomas and Bright specifically attacks pine seedlings and causes conspicuous mortality in naturally regenerated stands in the Sierra Madre Occidental, northern Mexico. We evaluated the host preference and attack of D. rhizophagus under field conditions. We tried to establish any relationship between tree growth or host size and the number of attacking beetles. Generally, only one pair of beetles attacked each of the seedlings regardless of host size; however, a significant positive linear relationship between host size and adult brood size was observed. We found that this species preferred the best growing seedlings in our study sites.
松树幼苗和幼树很少受到齿小蠹属树皮甲虫的侵害。然而，墨西哥西部山脉自然更新林分中，墨西哥齿小蠹（鞘翅目：象甲科：小蠹亚科）专门攻击松树幼苗并导致显著死亡。我们在野外条件下评估了墨西哥齿小蠹的寄主偏好和攻击情况。我们试图确定树木生长或寄主大小与攻击甲虫数量之间的任何关系。一般来说，无论寄主大小，每株幼苗通常只有一对甲虫攻击；然而，观察到寄主大小与成虫繁殖量之间存在显著的正线性关系。我们发现该物种在我们的研究地点更喜欢生长最好的幼苗。
