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ABSTRACTField experiments were conducted in 2013 and 2014 to evaluate the predation efficacy of four commercially available predatory mites (Phytoseiidae): Phytoseiulus persimilis, Neoseiulus californicus, N. fallacis, and Amblyseius andersoni, for control of twospotted spider mite (Tetranychus urticae Koch) and Lewis spider mite (Eotetranychus lewisi) in strawberries. In the 2013 experiment, a grower standard treatment (P. persimilis and N. californicus) was compared to single treatments of each phytoseiid species. The 2014 experiment excluded N. fallacis as a treatment, but all other treatments are the same as in 2013. For both seasons, all treatments decreased both two-spotted and Lewis spider mite populations immediately after releases equivalently. However, none of the treatments tested were able to keep twospotted and Lewis spider mite populations below the economic threshold level. These findings indicate that several releases will be needed throughout the growing season in order to maintain spider mite levels below the economic thresholds. 相似文献
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Margaret Lloyd Daniel Kluepfel Thomas Gordon 《International Journal of Fruit Science》2016,16(4):84-107
ABSTRACTComposts can have beneficial effects on strawberry production and these benefits can be dependent on the type of compost used. Four commercial composts were evaluated: cow manure, spent mushroom, yard trimmings, and vermicompost. The nutrient composition, abundance of fungi and bacteria, and microbial activity were determined. Five field trials assessed effects on plant growth, root development, soil microbial activity, nutrient availability, and yield during one growing season. Manure and mushroom compost significantly increased soil electrical conductivity levels to 9.9 ± 1.7 dS/m and 7.3 ± 0.8 dS/m, respectively. Manure, yard trimmings, and mushroom composts shifted soil pH toward optimal levels for up to 7 months. Mushroom compost had the greatest effect on soil nitrate, which was up to 32 mg/kg of soil higher than non-amended soil. Significant effects on yield were more likely to occur where environmental conditions and management practices were less than optimal or compost was not routinely added. Several factors important to plant production were significantly affected by compost: soil salinity, plant establishment, soil nitrate, production curves, soil microbial activity, and soil pH. 相似文献
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草莓脱毒及组培快繁研究 总被引:1,自引:0,他引:1
剥离培养0.3mm的草莓微茎尖,脱毒率可达100%.最佳芽诱导培养基为MS BA1.0mg/L;最佳继代培养基为MS十BA0.5mg/L;最佳生根培养基为MS BA0.1mg/L 活性碳1.0g/L. 相似文献
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草莓主栽品种再生和转化的研究 总被引:41,自引:2,他引:41
建立草莓主栽品种高效、稳定的离体再生体系和遗传转化体系, 获得了转基因植株。‘弗吉尼亚’和‘森嘎拉’的叶片离体再生芽频率达到100 %。试管苗叶片与农杆菌菌株EHA105 共培养3 d。共培养后的叶片在附加卡那霉素40 mg/L 的再生培养基上选择培养4周后, 外植体再生出转化芽, 弗吉尼亚的转化芽再生频率可达6. 8 %。采用组织化学染色法对随机选取的10 个GUS 基因转化植株进行基因表达测定, 结果5 个植株强烈表达GUS 活性。转bar 基因植株在附加除草剂草丁膦10 mg/L 的培养基上能够正常分化, 在田间对草丁膦表现出强烈抗性。转基因植株开花、结果正常。 相似文献
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中国草莓属( Fragaria) 植物的分类研究 总被引:15,自引:0,他引:15
中国是世界上野生草莓种类最丰富的国家。近20年来, 从国内外收集保存了103份野生草莓资源, 鉴定出我国自然分布有11个种, 约占世界草莓属植物20个种的一半。这11个种包括8个二倍体种: 森林草莓(Fragaria vesca L. ) 、黄毛草莓( F. nilgrrensis Schlecht. ) 、五叶草莓( F. pentaphylla Lozinsk. ) 、纤细草莓( F. gracilis Lozinsk. ) 、西藏草莓( F. nubicola Lindl. ) 、绿色草莓( F. viridis Duch. ) 、裂萼草莓( F. daltoniana Gay) 、东北草莓( F. m andschurica Staudt) 和3个四倍体种: 东方草莓( F. orientalis Lozinsk. ) 、西南草莓〔F. m oupinensis ( Franch. ) Card. 〕、伞房草莓( F. corymbosa Lozinsk. ) 。对我国原产野生草莓种类进行了较系统的性状描述和分类研究, 并列出了我国野生草莓分种检索表。提出我国分布有11个种的结论比以前记载的8个种更全面和完整。 相似文献
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草莓属低倍性野生资源在育种中利用的研究进展 总被引:3,自引:1,他引:3
草莓低倍性野生种中蕴藏着丰富优良性状的基因资源,由于染色体倍性差异,将野生低倍性种质优良性状基因向栽培种凤梨草莓转移存在一定障碍。对采用有性杂交结合染色体加倍、原生质体培养和体细胞融合获得种间杂种的技术作了综述,并对种间杂交后代的鉴定作了简介,同时展望了我国原产草莓低倍性野生种质导入栽培品种的意义和技术途径。 相似文献
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以童子1号和赛娃2个草莓品种为材料,研究了桶式水培和管式水培2种水培方式下,3种浓度的营养液处理对草莓结果特性及果实品质的影响.试验结果表明,综合比较草莓的开花结果、果实大小、产量和果实品质指标,赛娃好于童子1号,桶式水培优于管式水培,童子1号在1.5倍剂量营养液处理下的表现优于其他浓度处理,赛娃在1.0倍剂量营养液浓... 相似文献
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草莓脱毒种苗快繁节本关键技术研究 总被引:2,自引:0,他引:2
继代培养基中BA浓度0.1 mg/L和0.6 mg/L的交替使用、继代周期为30天能提高不定芽的增殖率;高效生根培养基为1/4 MS 1.5%食用糖;食用糖、自来水替代蔗糖、蒸馏水,以及培养基回收等技术降低了生产成本70%. 相似文献
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草莓对镉的吸收积累特性及调控研究 总被引:18,自引:4,他引:18
在草莓体内, 镉(Cd) 按照富集系数根> 茎> 叶> 果的规律分布; 在营养液中, 草莓对镉的吸收量随时间的延长而增加, 草莓对镉的吸收速率在40 min 时达到高峰, 随后逐渐降低。水培试验表明,钙、磷能够降低草莓对镉的吸收; 土培试验表明, CaCO3和Na2SiO3 均能降低镉在草莓果实中的积累, 这种降低与土壤酸度的降低有关, CaCO3 对降低草莓果实镉的积累更为明显, 这种降低可能还与钙对镉的拮抗有关。土壤中添加CaCO3 是一种切实可行的降低草莓果镉积累的措施。 相似文献
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