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Chemical control of two Phytophthora species infecting the canopy of Monterey pine (Pinus radiata) 下载免费PDF全文
Twelve active ingredients were screened for their ability to control foliage disease caused by Phytophthora kernoviae and Phytophthora pluvialis. Inhibition of mycelial growth and sporangial production of both pathogens were assessed in in vitro assays after exposure to three concentrations of each active ingredient. While most of these active ingredients inhibited mycelial growth in vitro, due to their widespread use, phosphite, copper oxychloride and metalaxyl‐M were selected for further study. Four rates of each active ingredient were applied to two Pinus radiata genotypes, and detached needle assays at 6 and 90 days post‐treatment were used to determine treatment efficacy and persistence. Untreated needles showed significantly larger lesions than all fungicide‐treated needles after exposure to P. pluvialis or P. kernoviae on both sampling dates. Efficacy and persistence of the three active ingredients did not increase with increase in concentration. Larger lesions were formed on more susceptible genotype after inoculation with both Phytophthora species, even when higher rates of active ingredients were applied. Phosphite, copper oxychloride and metalaxyl‐M have potential to protect commercially planted P. radiata from these two Phytophthora species. 相似文献
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本文对全省的森林病虫害防治工作进行了总结,明确了全省森防工怍的总体思路和今后一个时期全省森防工作的重点,提出了森防工作全面提升控灾减灾能力的具体措施。 相似文献
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该文通过对渭北旱塬千阳县核桃造成危害的主要病虫害种类的调查及防治,总结出了具体有效的防治技术措施,以期能为当地广大核桃果农提供技术支持,降低果农经济损失,增加果农种植核桃的积极性。 相似文献
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为进一步改善旬阳县狮头柑产量、质量,笔者总结了狮头柑建园管理及病虫害防治技术,为实现该产业在旬阳县稳步发展提供参考。 相似文献
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湖北省杨树病虫害生态防治对策 总被引:1,自引:1,他引:1
杨树是我国重要的防护林和用材林树种,但病虫害的迅猛发展造成了巨大损失。本文在总结现有杨树病虫害防治方法的基础上,为杨树生态防治提出了建议,以促进杨树产业和社会经济的可持续发展。 相似文献
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福建沙县毛竹主要害虫发生成因与防控对策 总被引:7,自引:7,他引:0
近年来,沙县毛竹虫害发生面积急剧上升,危害程度日趋严重,对毛竹资源构成很大威胁,严重破坏森林生态系统,给林权者造成巨大经济损失。文章结合沙县毛竹害虫发生和防治的历史资料,系统分析了毛竹主要害虫发生发展的主要原因,探讨了毛竹主要害虫今后的发生趋势,指出在防控毛竹主要害虫工作中存在的主要问题,在此基础上提出了沙县毛竹主要害虫综合防控对策。 相似文献
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Audrius Menkis Inga-Lena Östbrant Karin Wågström Rimvydas Vasaitis 《Scandinavian Journal of Forest Research》2016,31(3):237-241
The island of Gotland (Sweden) possesses the largest (more than one million trees) wild population of elms in northern Europe, which until recently was not affected by Dutch elm disease (DED). In 2005, DED was observed for the first time in the northeastern part of Gotland, and in the following years, it rapidly spread in all directions, generally following the major distribution of elms. Implementation of intensive control measures including ground surveys and geographic information system mapping of DED-diseased trees, their felling and destruction, and stump treatment with the herbicide glyphosate allowed reduction of the source of infection and probably suppression of an otherwise very rapid spread of the disease. Monitoring the flying periods of Scolytus multistriatus vector beetles between the years 2007 and 2011 showed that the abundance of trapped beetles in most cases differed significantly among individual years. Over the entire monitoring period, 55.2% of the beetles were trapped in June, 31.2% in July and 13.5% in August (difference among individual months significant at p?.0001). In conclusion, the study demonstrated the seasonal flying patterns of S. multistriatus, suggesting that the removal of trees attacked in the previous vegetation period as a combat measure should be completed before the beginning of the flying season of S. multistriatus, and that the application of the integrated DED management has the potential to arrest the development of the disease in a geographically isolated area such as Gotland. 相似文献
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植物遗传工程研究在林业研究中的应用有两个方面。首先,遗传图谱的构建,是林木育种和基因转移的有利工具,使森林遗传学和林木育种学研究产生了新的飞跃,还为林木早期选择,提高选择效果,缩短选育周期提供了可能;其次,在森林病虫害防治中,通过植物遗传工程,克隆毒蛋白基因,并将抗虫基因转入植物细胞,得到抗虫转基因植株,从而为林木的抗病育种提供一个划时代的手段。 相似文献
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基于人工智能的竹类主要害虫识别系统开发与应用 总被引:1,自引:1,他引:0
在当前四川省竹产业大发展背景下,将以人工智能为代表的计算机高新技术引入竹子的生产经营环节,对竹产业基地实行精细化管理和提高竹产业绩效具有重要的现实意义。文章介绍了基于深度神经网络搭建的人工智能识别模型,并在此基础上设计并开发了针对竹类主要害虫的识别系统,实现了通过APP软件对竹类主要害虫进行便捷、准确识别,极大地提升了森防工作效率,为竹产业基地的健康发展提供了有效科技支撑,同时也为林业生产经营由传统模式转向智慧化进行了技术储备。 相似文献
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张源财 《林业机械与木工设备》2011,39(8)
介绍了黑龙江省北部高寒地区行道树木养护中的灌水、整形修剪、病虫害防治、中耕除草、防寒等方面的管理经验。Abstract: The management experience in such aspects as watering,trimming and pruning,disease and pest control,weed control and cold-proof operation involved in the maintenance and care of road trees in northern Heilongjiang is introduced. 相似文献
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辽宁省沙地樟子松人工林衰退原因与治理对策 总被引:7,自引:1,他引:6
樟子松是一个优良的防风固沙和干旱地区造林树种,目前在辽宁西北部和整个“三北”地区已推广造林30多万hm^2,其中辽宁的章古台地区是最早引种成功的。但自90年代初以来,大面积沙地樟子松人工林发生了衰退枯死现象。文章在大量调查的基础上,对樟子松衰退枯死原因进行了分析,并提出相应的治理对策。 相似文献
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本项研究在总结传统育苗的基础上,应用推广了苗木生长调控新技术,新老技术紧密结合配套使用,取得了松树大田育苗的良好效果。通过选择圃地、控制播种量、精耕细作、科学管理,并在苗木旺盛生长期的8月中旬进行切根、剪顶,有效地促进了苗木生长发育。结果表明,马尾松播种量45kg/hm2,培育苗木169.2万株,Ⅰ、Ⅱ、Ⅲ级合格苗出圊率时%,其中优质苗率达53.5%。苗木茎干粗壮、根系发达、菌根丰富,达到了大田优质苗的质量标准。 相似文献
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防治松萎蔫病的新策略及林间防效初报 总被引:2,自引:0,他引:2
在松萎蔫病是由松材线虫与其携带的致病细菌诱导的一种复合侵染病害的新学说的指导下,根据松萎蔫病在疫区病树呈聚集分布,提出了防治松萎蔫病的新策略,即利用我们研究开发防治松萎蔫病的新药剂α-三噻吩与杀细菌剂恶喹酸对在以病死树中心周围半径50 m的范围内所有寄主树进行注干处理。经过2010—2011年在面积近20 hm2的处理黑松林地的防治试验,至2011年12月已经取得了良好的防效。处理林地中没有再发生病死树,对照区内却有24株病死树。防治仍在继续,新结果将继续报道。 相似文献