为给郑州市园林绿化优良花卉品种选择提供依据,在郑州市金水区进行了 10种鼠尾草引种栽培试验和观赏价值评价,结果表明:在抗病虫害、耐涝性、耐寒性等适应性方面,10种鼠尾草在采取必要的管护措施后,整体表现良好;观赏价值方面,不同品种在花色、花形、花期等表现不一、各有优劣,适用于郑州市园林景观中的多种应用形式,值得大面积推广,建议郑州市优先选用凤梨、墨西哥、萨丽芳等优良品种.

In order to effectively control jujube dry rot disease,47 fungal isolates of jujube dry rot plaques from different sources were identified and characterized by using sequence analysis of internal transcribed spacer（ITS） and elongation factor 1 α（EF-1α） genes and indoor inoculation method,and their distribution characteristics and virulence differences were analyzed. The distribution characteristics and differences in pathogenicity were also studied. The results showed that Botryosphaeria dothidea,Spencermartinsia viticola,Diplodia mutila,D. seriata,and Phaeobotryon rhois were identified as the major pathogens causing jujube dry rot. Among them,the isolation frequency of S. viticola was the highest（65.96%）,followed by that of B. dothidea（17.02%）. The dominant pathogens were different in different regions. B. dothidea and D. seriata were the predominant species in Henan and Hebei areas,and S. viticola was the predominant species in Shanxi,Gansu,and Ningxia areas. The pathogenicity of different pathogens to jujube tree was different,and the results indicated that the pathogenicity of B. dothidea was the highest and that of P. rhois was the weakest. The results of this study showed that the pathogens of jujube dry rot were mainly composed of 5 species in the Botryosphaericeae family,and the dominant pathogens were different in different regions. In terms of pathogenicity,the pathogenicity of different strains of the same pathogen varies in different regions,and the pathogenicity of different strains of pathogens in the same region also varies. The results of this study provide reference for the precise prevention and control of jujube dry rot in different areas.

'黄金蜜1号'桃是中国农业科学院郑州果树研究所选育的早熟桃新品种.于2019年将'黄金蜜1号'引入新郑试栽,经过3年的栽培观察,该品种适应性强,在新郑地区表现出丰产、果实品质佳的特点,适宜在该地区栽培.果实近圆形,果皮底色金黄,部分果面披鲜红色,果肉黄色;6月上中旬成熟.

首次将紫菀作为园林观赏植物在郑州地区引进栽植,观察生长情况及抗逆性表现,进行修剪、抗旱等试验.结果显示,紫菀越冬叶片持续保持绿色,花期可达半年(5～10月),耐-12℃低温,耐干旱,适度干旱有利于提前花期;耐修剪,秋季10月齐根短截是提高冬季绿色覆盖率快捷有效措施;可粗放管理,适合在郑州推广应用.

伴随着社会经济的不断发展和进步,我国的农业经济也获得了比较大的进步,但是目前农作物的生产过程中的病虫害已经成为了当前农业经济发展中的难题,影响着农作物的产量.实践中造成农作物减产的原因是多方面的,而作物在生长过程中病虫草害是导致农作物减产的重要因素.近年来,伴随着社会的不断进步和发展,生物技术在植物病虫害的防治中应用越来越广泛,获得了比较好的效果.本文主要结合实践,就生物技术在植物病虫害防治中的应用开展了研究和分析.

通过对新郑桃树虫害的调查,分析了新郑为害桃树的主要害虫梨小食心虫、桃蛀螟、桃小食心虫、桃蚜和桃红颈天牛,摸清了这5种主要害虫在新郑桃园的发生规律及为害特点,并结合防治试验,总结了一套有效的综合防治措施.

本文主要论述了林业树木死亡的原因以及对策,供参考.