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林下植被对西南桦人工林拟木蠹蛾为害的影响
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作者 刀保辉 王春胜 +4 位作者 段桂林 郑用文 杨万柳 杨从发 曾杰 《中南林业科技大学学报》 CAS CSCD 北大核心 2023年第5期1-6,共6页
【目的】拟木蠹蛾是为害西南桦的一种钻蛀类昆虫,其为害是制约西南桦种植业发展的主要因素;探究林下植被管理对西南桦人工林生长及拟木蠹蛾为害的影响,对于西南桦蛀干害虫绿色高效防控及其人工林可持续经营具有重要意义。【方法】以5年... 【目的】拟木蠹蛾是为害西南桦的一种钻蛀类昆虫,其为害是制约西南桦种植业发展的主要因素;探究林下植被管理对西南桦人工林生长及拟木蠹蛾为害的影响,对于西南桦蛀干害虫绿色高效防控及其人工林可持续经营具有重要意义。【方法】以5年生西南桦人工纯林为对象,设置全面清除(T2)、带状清除(T1)和对照(CK)3个处理开展为期3 a的林下植被清除试验,揭示林下植被对林分生长和拟木蠹蛾为害状况的影响。【结果】试验期间,3个处理间西南桦胸径、树高、枝下高、冠幅的年增长量差异均不显著(P≥0.05),仅T2处理在整个试验期内的胸径累积增长量显著高于T1和CK处理(P <0.05);期间西南桦胸径、树高、枝下高、冠幅年均生长量分别为0.85~1.41 cm、0.86~1.72 m、0.78~1.58 m和0.20~0.35 m。西南桦林分内拟木蠹蛾为害程度在各处理间存在显著差异,而且随着林下植被清除强度的增大而加剧;试验第1年,T2处理的西南桦林分有虫株率和单株虫口密度分别为17.04%和1.70个,是对照的3.63倍和1.45倍;连续处理2 a后,T2处理的西南桦林分有虫株率和单株虫口密度分别为44.12%和1.81个,是对照的4.09倍和1.60倍;而试验进行的第3年,所有处理的拟木蠹蛾为害程度均极低,有虫株率仅为0.66%~1.52%。【结论】林下植被显著影响西南桦人工林拟木蠹蛾为害程度,建议西南桦林分抚育时尽量保留林下植被,仅清除恶性杂灌和藤本植物,不仅可以节省经营成本,提升木材质量,而且能够改善林分健康状况,提升林分稳定性。 展开更多
关键词 林下植被清除 西南桦 蛀干害虫 林分生长 虫害生态防控
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Occurrence Dynamics and Control Strategies of Major Pests and Diseases of Sugarcane in Yunnan
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作者 李文凤 张荣跃 +4 位作者 单红丽 尹炯 王晓燕 罗志明 黄应昆 《Agricultural Science & Technology》 CAS 2017年第12期2490-2494,共5页
In recent years, the occurrence and harm of many kinds of pests and diseases have become increasingly serious in Yunnan sugarcane areas, which have greatly affected the sustained and stable development of sugarcane pr... In recent years, the occurrence and harm of many kinds of pests and diseases have become increasingly serious in Yunnan sugarcane areas, which have greatly affected the sustained and stable development of sugarcane production, so the situation of their prevention and control has become rigorous. In order to scien- tifically and effectively prevent and control pests and diseases of sugarcane to en- sure the safety of sugarcane production, on the basis of an investigation and re- search, according to the present situation of sugarcane production in Yunnan, the occurrence dynamics of major pests and diseases of sugarcane were analyzed, and corresponding control strategies were proposed according to the major pests and diseases as well as their occurrence and damage characteristics. 展开更多
关键词 Yunnan sugarcane areas SUGARCANE Pests and diseases Occurrencedynamics Control strategies
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