Five-year operational trial of verbenone to deter mountain pine beetle (Dendroctonus ponderosae;: Coleoptera:Scolytidae) attack of lodgepole pine (Pinus contorta)
Five-year operational trial of verbenone to deter mountain pine beetle (Dendroctonus ponderosae;: Coleoptera:Scolytidae) attack of lodgepole pine (Pinus contorta)
复制标题
DOI：
10.1603/0046-225x-34.6.1402
复制
发表时间：
2005-12-01
影响因子：
1.7
通讯作者：
Progar, RA
中科院分区：
文献类型：
--
作者：
Progar, RA
在爱达荷州中部的锯齿国家娱乐区的红鱼湖和小红鱼湖周围的露营地和行政区，对抗聚集信息素马鞭草烯酮进行了为期5年的操作测试，以阻止山松甲虫对小松树的大规模攻击。每年，5克马鞭草烯酮袋均匀分布（约10米）内的14个0.2公顷的地块。在研究的前2年期间，在处理的地块上，12%的> 13 cm胸径的宿主树木被攻击并死亡，而在未处理的地块上，树木的死亡率中位数为59%。当未经处理的地块上约50%的树木被杀死时，处理地块上可检测到的甲虫对马鞭草烯酮的反应急剧下降。5年后，山松甲虫已经杀死了中位数的87%的lodgepole松树> 13厘米的未处理的地块和67%的地块含有马鞭草烯酮袋。甲虫压力较高，未处理的地块在2000年和2001年，几乎相等的治疗在2002年，马鞭草烯酮处理的地块在2003年较高，在2004年治疗之间的相似。假设2年后对马鞭草烯酮缺乏反应可能与种群大小和空间尺度有关，即，在优选的大直径树木数量减少的局部区域中，大量旺盛的甲虫变得拥挤和紧张，导致对马鞭草烯酮的反应下降。马鞭草烯酮引起的松树广泛死亡的2年延迟将使土地管理者有时间使用其他管理策略，以阻止山松甲虫造成的树木灾难性损失。
The antiaggregation pheromone verbenone was operationally tested for 5 yr to deter mass attack by the mountain pine beetle on lodgepole pine in campgrounds and administrative areas surrounding Redfish and Little Redfish Lakes at the Sawtooth National Recreation Area in central Idaho. Each year, five-gram verbenone pouches were evenly distributed (approximate to 10 m apart) within seven of 14 0.2-ha plots. During the first 2 yr of the study a median of 12% of the host trees > 13 cm dbh were attacked and killed on the treated plots, whereas trees on the untreated plots incurred a median mortality of 59%. When approximate to 50% of the trees on the untreated plots were killed a detectable beetle response to verbenone on the treated plots dramatically declined. After 5 yr, mountain pine beetle had killed a median of 87% of the lodgepole pine trees > 13 cm in untreated plots and 67% in plots containing verbenone pouches. Beetle pressure was higher on untreated plots in 2000 and 2001, nearly equal between treatments in 2002, higher on verbenone-treated plots in 2003, and similar between treatments in 2004. It is hypothesized that the lack of response to verbenone after 2 yr may be related to both population size and spatial scale, i.e., large numbers of vigorous beetles in a local area with a reduced number of preferred large-diameter trees become crowded and stressed, causing a decline in the response to verbenone. The 2-yr delay in widespread pine mortality caused by verbenone would have given land managers time to use other management tactics to deter catastrophic loss of trees caused by mountain pine beetle.