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- The biological characteristics of Dendroctonus ponderosae in BC,Canada was introduced from its distribution,parasitism,morphology,life cycle to its damage. 从分布及寄主,形态特征及生活史,为害特性对中欧山松大小蠹的生物学特性作了介绍。
- Dendroctonus ponderosae 中欧山松大小蠢
- Forest production Larix, Pinus ponderosa. 林区产落叶松、黄松。
- Forestry mainly Pinus ponderosa, Larix. 林业主要有黄松、落叶松。
- Okay! A used car with a ponderosa pine. 好的!一辆惯用的车子和北美黄松.
- The Red turpentine bark beetle, Dendroctonus valens LeConte, is an invading pest of pines in China. 摘要红脂大小蠹是我国近年来重要的入侵害虫。
- Ips and Dendroctonus are regarded as attacking bark beetle and all species bore and damage Pinus. 齿小蠹和大小蠹一样,都被认为是最具进攻性的树皮小蠹,该属小蠹都以松属植物为寄主。
- Callaham and Liddicoet found an elevational cline in ponderosa pine from Northern California. 卡拉汉和利狄柯特发现加利福尼亚北部产的黄松有一海拔渐变群。
- YIN H F.The synopsis on morphological and biological characters of Dendroctonus valens LeConte[ J].Acta Zootaxonomica Sinica , 2000, 25 ( 1 ): 42-43. [1]殷惠芬.;强大小蠹的简要的形态学特征和生物学特征[J]
- The current damage situation of Dendroctonus ponderosaein BC,Canada and the researches which had been conducted by Canada were reviewed and discussed. 继后对此虫害在加拿大BC省为害的现状及该国目前对中欧山松大小蠹的研究进行了论述。
- The Black Hills get their name from the dark cloak of ponderosa pine trees that cover the landscape. 黑山得名于覆盖这个风景区的西黄松的暗色调。
- Space distribution of entering tree hole of Dendroctonus vales imago was measured by diffusion coefficient (one of six indexes). 应用扩散系数等6种指数法测定了红脂大小蠹成虫侵入孔的空间分布型。
- EACH summer families drive from South Dakota's plains into the Black Hills, thick with ponderosa pines. 每年夏季,许多家庭都会驱车从南达科他州的平原地区前往黄松密布的布莱克山。
- But the ponderosa pines (松) that grow in the American southwest have rings of different width. 但生长于美国西南部的黄松,其年轮的宽窄却是不等的。
- Worse, these fires can utterly destroy forests of Ponderosa pine, the dominant tree species in the West. 更糟的是,这种大火可能摧毁黄松(Ponderosapine)森林,那是美国西部主要的树种。
- Red turpentine beetle (Dendroctonus valens, RTB), which was probably introduced from USA, is one of the most important invasive pests in Chinese forest ecological system. 摘要红脂大小蠹是我国重要的外来入侵害虫,给我国林业生产和国土生态安全带来巨大危害。
- Population dynamics of Dendroctonus valens at the egg stage, larval stage and adult stage in Shaanxi province was studied by lure-wood and indoor breeding. 用饵木诱集及室内自然温度饲养方法确定了红脂大小蠹在陕西韩城雷寺庄林区成虫、卵、幼虫种群数量的年变动规律。
- A tall timber tree (Pinus ponderosa) of western North America, having long, dark green needles grouped in fascicles of three. 美国黄松:产于北美洲西部的一种高大的木材树(西黄松松属),长有深绿色的长松针,每三根松针聚成一个簇生叶
- Other species, like the ponderosa pines seen burning in this aerial shot of an Idaho fire, need frequent but more mild, low-level fires to thrive. 其它的种类,像美国黄松看到烧上在这空中的拍照一个爱达荷火灾,需要经常但是更多轻微的,低水平的火灾使繁荣兴旺。
- If Sierra is a jury member also,why shouldn’t they’ve bonded witheach other a little bit more in Ponderosa,and being nicer to eachother? 最近我心情很低落,年仅34岁的歌手阿桑因为乳腺癌去世了,还有之前的陈晓旭以及一些默默无名的可爱生命都因此疾病而陨落。