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Quarantine Identification of Dendroctonus punctatus
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作者 李健 陆苗 +4 位作者 张呈伟 李艳华 杨光 梁小松 吴新华 《Agricultural Science & Technology》 CAS 2014年第9期1580-1582,共3页
Dendroctonus spp. is one of the most portable pests in imported and ex- ported timber and wooden packages, and it is an important object of the port quarantine. Making rapid and accurate identification of Dendroctonus... Dendroctonus spp. is one of the most portable pests in imported and ex- ported timber and wooden packages, and it is an important object of the port quarantine. Making rapid and accurate identification of Dendroctonus spp. is an im- portant method to reduce the invasion risk of Dendroctonus spp. for China. In this paper, Dendroctonus punctatus, which belongs to the Dendroctonus spp., is intro- duced in detail from the aspects of taxonomic status, biological characteristics, mor- phological characteristics and the invasion risk, providing reference for the identifica- tion of Dendroctonus punctatus in inspection and quarantine. 展开更多
关键词 dendroctonus punctatus TAXONOMY Identification characteristics Intro- ducing risk
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Space-time Dynamics of Dendroctonus valens Population in China and Spatial Sampling Technique based on Its Spatial Distribution Pattern
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作者 Pan Jie Wang Tao +2 位作者 Zong Shixiang Wen Junbao Luo Youqing 《Plant Diseases and Pests》 CAS 2015年第3期20-24,38,共6页
Red turpentine beetle (RTB), Dendroctongs valens LeConte, is a destructive forest invasive species in China, it mainly attacks Pings tabuliformis and P. bungeana. So far it has spread rapidly to the provinces of Sha... Red turpentine beetle (RTB), Dendroctongs valens LeConte, is a destructive forest invasive species in China, it mainly attacks Pings tabuliformis and P. bungeana. So far it has spread rapidly to the provinces of Shanxi, Hebei, Henan, Shanxi and Beijing since its first outbreak in Shanxi Province in 1998, and has caused extensive tree mortality. Space-time dynamics of D. valens population and spatial sampling technique based on its spatial distribution pattern were ana- lyzed using geostatistical methods in the pure P. tabuliforis forests and mixedwood stands which were at different damage levels. According to the spatial distribu- tion of D. valeas population, the specific spatial sampling technique was also studied, and then was compared with traditional sampling technique. The spatial sam- piing technique combined with sampling theory and the biological characteristics of D. valens population, which not only could calcnlate the error of the sampling, but also could discuss the optimal sampling number and the optimum size of plot according to different damage levels and different stand types. This helps to explain population expansion and colonization mechanism of D. valens, and to provide a good reference for adopting snitable control measures. 展开更多
关键词 dendroctonus valens Spatial distribution pattern GEOSTATISTICS Space-time dynamics Spatial sampling
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Effects of simulated gut pH environment on bacterial composition and pheromone production of Dendroctonus valens
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作者 Qingjie Cao Yu Zhao +2 位作者 Tuuli-Marjaana Koski Huiping Li Jianghua Sun 《Insect Science》 SCIE CAS CSCD 2024年第1期225-235,共11页
Bark beetles are an economically and ecologically important insect group,with aggregation behavior and thus host colonization success depends on pheromone-mediated communication.For some species,such as the major inva... Bark beetles are an economically and ecologically important insect group,with aggregation behavior and thus host colonization success depends on pheromone-mediated communication.For some species,such as the major invasive forest pest in China,red turpentine beetle(Dendroctonus valens),gut microbiota participates in pheromone production by converting tree monoterpenes into pheromone products.However,how variation in gut microenvironment,such as pH,affects the gut microbial composition,and consequently pheromone production,is unknown.In this study,we fed wild caught D.valens with 3 different pH media(main host diet with natural pH of 4.7;a mildly acidic diet with pH 6 mimicking the beetle gut pH;and highly acidic diet with pH 4),and measured their effects on the gut pH,bacterial community and production of the main aggregation and anti-aggregation pheromone(verbenone).We further tested the verbenone production capacity of 2 gut bacterial isolates in different pH environments(pH 6 and 4).Compared to natural state or main host diet,feeding on less acidic diet(pH 6)diluted the acidity of the gut,whereas feeding on highly acidic diet(pH 4)enhanced it.Both changes in gut pH reduced the abundance of dominant bacterial genera,resulting in decreased verbenone production.Similarly,the highest pheromone conversion rate of the bacterial isolates was observed in pH mimicking the acidity in beetle gut.Taken together,these results indicate that changes in gut pH can affect gut microbiota composition and pheromone production,and may therefore have the potential to affect host colonization behavior. 展开更多
关键词 dendroctonus valens gut bacteria gut pH verbenone
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The effect of inactivation of aldehyde dehydrogenase on pheromone production by a gut bacterium of an invasive bark beetle,Dendroctonus valens 被引量:1
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作者 Qingjie Cao Tuuli-Marjaana Koski +2 位作者 Huiping Li Chi Zhang Jianghua Sun 《Insect Science》 SCIE CAS CSCD 2023年第2期459-472,共14页
Semiochemical-based management strategies are important for controlling bark beetles,such as invasive Red Turpentine Beetle(Denroctonus valens),the causal agent for mass mortality of pine trees(Pinus spp.)in China.It ... Semiochemical-based management strategies are important for controlling bark beetles,such as invasive Red Turpentine Beetle(Denroctonus valens),the causal agent for mass mortality of pine trees(Pinus spp.)in China.It has been previously shown that the pheromone verbenone regulates the attack density of this beetle in a dose-dependent manner and that the gut bacteria of D.valens are involved in verbenone production.However,molecular functional verification of the role of gut bacteria in the pheromone production of D.valens is still lacking.To better understand the molecular function of gut bacterial verbenone production,we chose a facultative anaerobic gut bacterium(Enterobacter xiangfangensis)of D.valens based on its strong ability to convert cis-verbenol to verbenone,as shown in our previous study,and investigated its transcriptomics in the presence or absence of cis-verbenol under anaerobic conditions(simulating the anoxic environment in the beetle's gut).Based on this transcriptome analysis,aldehyde dehydrogenase(ALDH1)was identified as a putative key gene responsible for verbenone production and was knocked-down by homologous recombination to obtain a mutant E.xiangfangensis strain.Our results show that these mutants had significantly decreased the ability to convert the monoterpene precursor to verbenone compared with the wild-type bacteria,indicating that ALDH1 is primarily responsible for verbenone conversion for this bacterium species.These findings provide further mechanistic evidence of bacterially mediated pheromone production by D.valens,add new perspective for functional studies of gut bacteria in general,and may aid the development of new gene silencing-based pest management strategies. 展开更多
关键词 aldehyde dehydrogenase dendroctonus valens gut bacteria MUTANTS TRANSCRIPTOME verbenone
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Evaluation of Beauveria bassiana (Hyphomycetes) isolates as potential agents for control of Dendroctonus valens 被引量:16
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作者 Long-Wa Zhang Yu-Jun Liu +5 位作者 Jian Yao Bin Wang Bo Huang Zeng-Zhi Li Mei-Zhen Fan Jiang-Hua Sun 《Insect Science》 SCIE CAS CSCD 2011年第2期209-216,共8页
The red turpentine beetle (RTB), Dendroctonus valens LeConte, as a destructive invasive pest, has become one of the most economically important forest pest in China. Effective control measures are desperately needed... The red turpentine beetle (RTB), Dendroctonus valens LeConte, as a destructive invasive pest, has become one of the most economically important forest pest in China. Effective control measures are desperately needed. Entomopathogenic fungi, such as Beauveria bassiana, have shown great potential for the management of some bark beetle species. In this study, 12 isolates of B. bassiana from bark beetle were examined for biological characteristics and virulence, to assess their potential as biocontrol agents for RTB. There were significant differences (at P = 0.05) in colony growth rate, conidial yield, conidial germination, tolerance to UV light and extracellular proteases activity among the tested B. bassiana isolates. Isolates, including Bbl801, Bb1906, Bb789 and Bb773, exhibited the best characteristics, because they have faster hyphal growth rate, higher spore production and faster spore germination, higher UV tolerance and protease (Prl) production. The results of a pathogenicity test ofB. bassiana on RTB larvae showed that most isolates of B. bassiana have demonstrated high efficacy and the highest virulent isolate was Bb 1801, which killed 100% of the treated insects and had a median lethal time (LT50) of 4.60 days at a concentration of 1 ×107 conidia/mL. Therefore, isolate Bb1801 has a great potential for sustainable control of RTB in the forest. The correlation between biological characteristics and virulence of the fungal isolates is discussed and the possibility of combination of entomopathogenic fungi with semiochemicals, as one of the promising strategy for RTB control, is considered. 展开更多
关键词 Beauveria bassiana biological characteristics microbial control dendroctonus valens VIRULENCE
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Colonization patterns of the red turpentine beetle, Dendroctonus valans (Coleoptera: Curculionidae), in the Luliang Mountains, China 被引量:4
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作者 Zhudong Liu Longwa Zhang +3 位作者 Zhanghong Shi Bo Wang Wan Qiang Tao Jiang-hua Sun 《Insect Science》 SCIE CAS CSCD 2008年第4期349-354,共6页
The alien red turpentine beetle (RTB), Dendroctonus valens LeConte, is one of the most economically destructive forest pests in China, having killed more than 6 million pines in recent years. There is a need to unde... The alien red turpentine beetle (RTB), Dendroctonus valens LeConte, is one of the most economically destructive forest pests in China, having killed more than 6 million pines in recent years. There is a need to understand the basic biology and ecology of the beetle in order to develop an effective monitoring and management strategy. In this study, the effects of hillside exposure (south- and north-facing), host-tree locations according to relief (valley, mid-slope, and ridge-top) and tree diameters on RTB colonization were investigated in one valley (3 sites). The results showed that (i) RTB clearly preferred colonizing pines growing on south-facing hillsides, especially in the valley; (ii) RTB preferred to colonize the pines growing at the valley rather than pines growing at mid-slope or on ridge-top; (iii) RTB preferred to colonize trees with large diameter over small and medium-sized pines; (iv) the attack density of RTBs (measured by pitch tubes/pine) was obviously higher on larger trees standing in the valley than other trees standing at other places. We conclude from RTB colonization patterns, that RTB prefers to attack large trees in the valley, which may be useful in developing a pest-management strategy. 展开更多
关键词 colonization patterns dendroctonus valens Pinus tabulaeformis tree diameter tree exposure tree location according to relief
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红脂大小蠹入侵机制与化学生态学研究 被引量:14
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作者 张龙娃 鲁敏 +1 位作者 刘柱东 孙江华 《昆虫知识》 CAS CSCD 北大核心 2007年第2期171-178,共8页
红脂大小蠹Dendroctonus valens LeConte是近来入侵我国的重大林业害虫,入侵山西后迅速在相邻省份扩展蔓延。文章围绕作者对红脂大小蠹入侵来源地、暴发机制以及红脂大小蠹化学生态学等领域开展的研究工作进展进行了总结。历史资料记载... 红脂大小蠹Dendroctonus valens LeConte是近来入侵我国的重大林业害虫,入侵山西后迅速在相邻省份扩展蔓延。文章围绕作者对红脂大小蠹入侵来源地、暴发机制以及红脂大小蠹化学生态学等领域开展的研究工作进展进行了总结。历史资料记载和分子证据均支持红脂大小蠹由北美(美国西海岸)地区传入。松树萜烯类化合物是红脂大小蠹寻找适合寄主的重要信号物质,近期在北美和中国几个地区同时开展的研究,确认了3-蒈烯对红脂大小蠹具有最强引诱作用,该研究结果简化和修正了先前北美一直使用的3组分植物源引诱剂配方;在筛选有效引诱成分的基础上,开展了引诱剂定量缓释载体的研究,该释放载体已经被授权专利,并得到广泛推广应用。红脂大小蠹信息素一直没有得到鉴定,近来通过对红脂大小蠹后肠提取物的分析,分离鉴定了5种电生理和行为上有生物活性的萜烯类氧化物,其中有3个组分对红脂大小蠹植物源引诱剂具有增效作用。在驱避剂方面,研究证实了马鞭草烯酮以及非寄主挥发物对红脂大小蠹具有驱避作用。同时,研究证明,马鞭草烯酮对红脂大小蠹的作用存在剂量效应。目前,作者正开展红脂大小蠹-共生菌-寄主松树三者相互关系以及红脂大小蠹与土著种之间化学通讯等方面的研究,以期阐明红脂大小蠹的入侵性及暴发机制,寻求更有效的控制途径。 展开更多
关键词 红脂大小蠹 dendroctonus valens 化学通讯 入侵机制
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华山松大小蠹天敌昆虫的研究进展
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作者 洪承昊 崔娥 +3 位作者 张子一 谭霄华 辛义军 黄发新 《湖北农业科学》 2022年第S01期17-19,24,共4页
华山松大小蠹(Dendroctonus armandi Tsai and Li)是中国特有种,是为害华山松的先锋型害虫,给秦巴山区森林生态造成了极大的破坏。由于其为害具有隐蔽性,发现时已造成华山松死亡。研究概述了现阶段华山松大小蠹的发生规律、入侵机制和... 华山松大小蠹(Dendroctonus armandi Tsai and Li)是中国特有种,是为害华山松的先锋型害虫,给秦巴山区森林生态造成了极大的破坏。由于其为害具有隐蔽性,发现时已造成华山松死亡。研究概述了现阶段华山松大小蠹的发生规律、入侵机制和风险评估情况,并基于此对华山松大小蠹及大小蠹属的天敌昆虫进行了统计和预估分析,可为进一步开发和利用天敌昆虫提供参考依据。 展开更多
关键词 华山松大小蠹(dendroctonus armandi Tsai and Li) 天敌 生物防治 研究进展
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Modelling potential distribution of a pine bark beetle in Mexican temperate forests using forecast data and spatial analysis tools 被引量:1
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作者 Antonio Gonzalez-Hernandez Rene Morales-Villafana +2 位作者 Martin Enrique Romero-Sanchez Brenda Islas-Trejo Ramiro Perez-Miranda 《Journal of Forestry Research》 SCIE CAS CSCD 2020年第2期649-659,共11页
Accurate and reliable predictions of pest species distributions in forest ecosystems are urgently needed by forest managers to develop management plans and monitor new areas of potential establishment.Presence-only sp... Accurate and reliable predictions of pest species distributions in forest ecosystems are urgently needed by forest managers to develop management plans and monitor new areas of potential establishment.Presence-only species distribution models are commonly used in these evaluations.The maximum entropy algorithm(MaxEnt)has gained popularity for modelling species distribution.Here,MaxEnt was used to model the spatial distribution of the Mexican pine bark beetle(Dendroctonus mexicanus)in a daily fashion by using forecast data from the Weather Research and Forecasting model.This study aimed to exploit freely available geographic and environmental data and software and thus provide a pathway to overcome the lack of costly data and technical guidance that are a challenge to implementing national monitoring and management strategies in developing countries.Our results showed overall agreement values between 60 and 87%.The results of this research can be used for D.mexicanus monitoring and management and may aid as a model to monitor similar species. 展开更多
关键词 Spatial analysis dendroctonus mexicanus GEODATABASES MAXENT Forest modelling
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Long-term landscape changes in a subalpine spruce-fir forest in central Utah, USA
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作者 Jesse L.Morris R.Justin DeRose Andrea R.Brunelle 《Forest Ecosystems》 SCIE CSCD 2016年第2期83-94,共12页
Background: In Western North America, increasing wildfire and outbreaks of native bark beetles have been mediated by warming climate conditions. Bioclimatic models forecast the loss of key high elevation species thro... Background: In Western North America, increasing wildfire and outbreaks of native bark beetles have been mediated by warming climate conditions. Bioclimatic models forecast the loss of key high elevation species throughout the region. This study uses retrospective vegetation and fire history data to reconstruct the drivers of past disturbance and environmental change. Understanding the relationship among climate, antecedent disturbances, and the legacy effects of settlement-era logging can help identify the patterns and processes that create landscapes susceptible to bark beetle epidemics. Methods: Our analysis uses data from lake sediment cores, stand inventories, and historical records. Sediment cores were dated with radiometric techniques (14C and 210pb/137Cs) and subsampled for pollen and charcoal to maximize the temporal resolution during the historical period (1800 CE to present) and to provide environmental baseline data (last 10,500 years). Pollen data for spruce were calibrated to carbon biomass (C t/ha) using standard allometric equations and a transfer function. Charcoal samples were analyzed with statistical models to facilitate peak detection and determine fire recurrence intervals. Results: The Wasatch Plateau has been dominated by Engelmann spruce forests for the last ~10,500 years, with subalpine fir becoming more prominent since 6000 years ago. This landscape has experienced a dynamic fire regime, where burning events are more frequent and of higher magnitude during the last 3000 years. Two important disturbances have impacted Engelmann spruce in the historical period: 1) high-grade logging during the late 19th century; and (2) a high severity spruce beetle outbreak in the late 20th century that killed 〉90 % of mature spruce (〉10 cm dbh). Conclusions: Our study shows that spruce-dominated forests in this region are resilient to a range of climate and disturbance regimes. Several lines of evidence suggest that 19th century logging promoted a legacy of simplified stand structure and composition such that, when climate became favorable for accelerated beetle population growth, the result was a landscape-scale spruce beetle outbreak. The lasting impacts of settlement-era landscape history from the Wasatch Plateau, UT may be relevant for other areas of western North America and Europe where sufficient host carrying capacity is important in managing for resistance and resilience to outbreaks. 展开更多
关键词 Spruce beetle Climate change dendroctonus Engelmann spruce LOGGING Western North America WILDFIRE
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Invasive bark beetle-associated microbes degrade a host defensive monoterpene 被引量:5
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作者 Le-Tian Xu Min Lu Jiang-Hua Sun 《Insect Science》 SCIE CAS CSCD 2016年第2期183-190,共8页
Conifers respond to herbivore attack with defensive chemicals, which are toxic to both insects and their associated microorganisms. Microorganisms associated with insects have been widely reported to metabolize toxic ... Conifers respond to herbivore attack with defensive chemicals, which are toxic to both insects and their associated microorganisms. Microorganisms associated with insects have been widely reported to metabolize toxic chemicals, which may help both microorganisms and host insects overcome host conifer defense. Dendroctonus valens LeConte, an introduced exotic pest from North America to China, has killed millions of healthy pines. Alpha-pinene is the most abundant defensive monoterpene in Chinese Pinus tabuliformis. Although microorganisms associated with D. valens have already been investigated, little is known about their bioactivities when encountering host defensive monoterpenes. In this study, we evaluated the influences of different concentrations ofα- pinene to D. valens and the three most frequently isolated yeasts and bacteria ofD. valens, and further assayed microorganisms' capabilities to degrade α-pinene. Results showed that the gallery lengths and body weight changes of bark beetles were significantly affected by 6 mg/mL and 12 mg/mL of α-pinene applied in media compared to controls. The tolerance of experimental microorganisms to α-pinene varied depending on the microbial species. Two out of three yeast strains and all three bacterial strains degraded 20%-50% of α-pinene compared to controls in 24 h in vitro. The microorganisms capable of α-pinene degradation in vitro and their tolerance to high levels ofα-pinene suggested that D. valens- associated microorganisms may help both microorganisms and the bark beetle overcome host α-pinene defense. 展开更多
关键词 Α-PINENE associated microorganisms dendroctonus valens
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Physical contact, volatiles, and acoustic signals contribute to monogamy in an invasive aggregating bark beetle 被引量:1
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作者 Zhu-Dong Liu Guo-Bing Mi +1 位作者 Kenneth F.Raffa Jiang-Hua Sun 《Insect Science》 SCIE CAS CSCD 2020年第6期1285-1297,共13页
The behavioral strategies and mechanisms by which some insects maintain monogamous mating systems are not well understood.We investigated the mating system of the bark beetle Dendroctonus valens,and identified several... The behavioral strategies and mechanisms by which some insects maintain monogamous mating systems are not well understood.We investigated the mating system of the bark beetle Dendroctonus valens,and identified several contributing mechanisms.Field and laboratory observations suggest the adults commonly form permanent bonds during host colonization.Moreover,it showed mated females that remained paired with males produced more offspring than mated females that were alone in galleries.In bioassays,a second female commonly entered a gallery constructed by a prior female.Videos show she commonly reached the location of the first female,but they did not engage in actual fighting.Rather,the second female typically departs to form her own gallery.Acoustic signaling likewise does not appear to influence female-female encounters,based on controlled muting experiments.Instead the intruder appears to perceive the residents presence by physical contact.Both acoustic signals and volatiles released by females during gallery constructing were shown to attract males.After a male joined a female in a gallery,the male-produced aggressive sounds,which were shown by playback to deter other males from entering the gallery.Unlike female-female interactions,resident males use their head and rear to push intruders out of galleries.Additionally,volatiles released by males during feeding repelled intruding males,discouraging them from entering the gallery.Males also construct plugs that block the entrance,which may prevent subsequent males and predators from entering the gallery.Thus,D.valens has evolved multifaceted mechanisms contributing to single pairings that confer benefits to both sexes. 展开更多
关键词 acoustic signals behavioral assay dendroctonus valens mating system PHEROMONES rivalry
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Large-diameter trees, snags, and deadwood in southern Utah, USA 被引量:1
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作者 James A.Lutz Soren Struckman +3 位作者 Tucker J.Furniss Joseph D.Birch Larissa L.Yocom Darren J.McAvoy 《Ecological Processes》 SCIE EI 2021年第1期130-141,共12页
Background:The epidemic Dendroctonus rufipennis(spruce beetle)outbreak in the subalpine forests of the Colorado Plateau in the 1990s killed most larger Picea engelmannii(Engelmann spruce)trees.One quarter century late... Background:The epidemic Dendroctonus rufipennis(spruce beetle)outbreak in the subalpine forests of the Colorado Plateau in the 1990s killed most larger Picea engelmannii(Engelmann spruce)trees.One quarter century later,the larger snags are beginning to fall,transitioning to deadwood(down woody debris)where they may influence fire behavior,regeneration,and habitat structure.Methods:We tracked all fallen trees≥1 cm in diameter at breast height(1.37-m high)and mapped all pieces of deadwood≥10-cm diameter and≥1 m in length within 13.64 ha of a high-elevation mixed-species forest in the Picea–Abies zone annually for 5 years from 2015 through 2019.We examined the relative contribution of Picea engelmannii to snag and deadwood pools relative to other species and the relative contributions of large-diameter trees(≥33.2 cm at this subalpine site).We compared spatially explicit mapping of deadwood to traditional measures of surface fuels and introduce a new method for approximating vertical distribution of deadwood.Results:In this mixed-species forest,there was relatively high density and basal area of live Picea engelmannii 20 years after the beetle outbreak(36 trees ha^(−1) and 1.94 m^(2) ha^(−1)≥10-cm diameter)contrasting with the near total mortality of mature Picea in forests nearby.Wood from tree boles≥10-cm diameter on the ground had biomass of 42 Mg ha^(−1),7 Mg ha^(−1) of Picea engelmannii,and 35 Mg ha^(−1) of other species.Total live aboveground biomass was 119 Mg ha^(−1),while snag biomass was 36 Mg ha^(−1).Mean total fuel loading measured with planar transects was 63 Mg ha^(−1) but varied more than three orders of magnitude(0.1 to 257 Mg ha^(−1)).Planar transects recorded 32 Mg ha^(−1) of wood≥7.62-cm diameter compared to the 42 Mg ha^(−1) of wood≥10-cm diameter recorded by explicit mapping.Multiple pieces of deadwood were often stacked,forming a vertical structure likely to contribute to active fire behavior.Conclusion:Bark beetle mortality in the 1990s has made Picea an important local constituent of deadwood at 20-m scales,but other species dominate total deadwood due to slow decomposition rates and the multi-centennial intervals between fires.Explicit measurements of deadwood and surface fuels improve ecological insights into biomass heterogeneity and potential fire behavior. 展开更多
关键词 Cedar Breaks National Monument dendroctonus rufipennis Utah Forest Dynamics Plot Vertical fuel structure
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华山松大小蠹生物学特性观察及信息素引诱初报 被引量:1
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作者 成珍君 蔡继增 牟顺泰 《林业科技通讯》 2016年第5期48-50,共3页
在小陇山张家庄林场黑河自然保护区作为试验区,通过林间和室内观察相结合的方法,研究了华山松大小蠹(Dendroctonus armandi)的生物学特性,调查了树龄51a受害华山松单株的虫口密度,采用聚集信息素诱捕技术防治试验。结果表明,该虫在当地1... 在小陇山张家庄林场黑河自然保护区作为试验区,通过林间和室内观察相结合的方法,研究了华山松大小蠹(Dendroctonus armandi)的生物学特性,调查了树龄51a受害华山松单株的虫口密度,采用聚集信息素诱捕技术防治试验。结果表明,该虫在当地1a发生1代,6m以下树干虫口密度较大,老龄幼虫在木质部和韧皮部间越冬,4月下旬开始化蛹,5月中下旬开始羽化,6月中旬至7月下旬为成虫扬飞高峰期,7月下旬至8月上旬成虫交配产卵,8月中下旬可见到新孵化的幼虫开始危害,11月中旬老龄幼虫在坑道中越冬。 展开更多
关键词 华山松 华山松大小蠹 dendroctonus armandi 生活史 生活习性 防治技术
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