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比较了99%矿物油绿颖及其他杀螨剂对瑁溪蜜柚红蜘蛛室内毒力及田间防治效果.结果表明,绿颖作为杀螨荆需要较高的浓度,但使用安全性要远高于传统机油乳剂;绿颖与代森胺或松脂酸钠混用进行冬季清园,既可清除青苔,又可有效防治越冬红蜘蛛等害螨,优于松脂酸钠和"三胺"等常规配方;生长期使用绿颖200倍液对红蜘蛛速效性较好,持效期也较长,可达30天以上. 相似文献
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这几年随着三红琯溪蜜柚的推广,种植面积日渐扩大,市场上也受到消费者的追捧,2018年三红琯溪蜜柚平和县原产地收购价4元/kg,价格高、效益好。由于受到三红琯溪蜜柚的影响,2018年平和县原产地白肉琯溪蜜柚收购仅为1.4元/kg。由于效益低,果农对种植白肉琯溪蜜柚失去信心,目前有较多果园的白肉琯溪蜜柚被高接换种成三红琯溪蜜柚。笔者于2016年在自家果园高接1000棵三红琯溪蜜柚,2018年投产,产量2500kg·667m^-2,产值10000元·667m^-2,纯效益6000元·667m^-2。下面,笔者将这两年的三红琯溪蜜柚高接换种及管理技术总结如下。 相似文献
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为了加快平和琯溪蜜柚果实套袋技术成果转化，笔者从2001年开始采取边试验边示范推广的方法，以创建全国首批无公害农产品（水果）生产基地县为契机，将琯溪蜜柚果实套袋技术作为生产优质无公害琯溪蜜柚的关键技术，在平和县琯溪蜜柚产区迅速推广应用，全县累计推广应用琯溪蜜柚果实新型纸质套袋4．5亿个以上，有效提升了平和琯溪蜜柚的档次，促进了平和琯溪蜜柚出口欧盟，增强了市场竞争力，增加了农民收入，取得了良好的经济效益、社会效益和生态效益，深受果农的欢迎。 相似文献
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平和琯溪蜜柚是福建省平和县特色产业,是平和县经济收入的主要来源.据统计,2012年蜜柚年总产量100万t,出口量占12.5％.近年来,有部分外地品种冒充平和琯溪蜜柚,部分果农滥用农药和生产管理方法不当,对蜜柚质量和品牌造成一定的影响.因此,抓好平和琯溪蜜柚质量安全和品牌保护,是确保蜜柚产业发展的一项重要工作. 相似文献
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平和县是琯溪蜜柚之乡,全县蜜柚种植面积4.33万hm2,年产量约100万t,年出口约10万t.琯溪蜜柚已成为平和县重要的支柱产业,是平和县农民发家致富的＂摇钱树＂.介壳虫属昆虫纲同翅目蚧总科,是琯溪蜜柚的一种主要虫害,其抗药能力强、发生较普遍、为害较严重、防治较困难,使用高毒农药防治该虫是造成近年来出口蜜柚农药残留超标的主要原因.通过几年来对平和县琯溪蜜柚介壳虫发生情况进行调查,掌握其发生规律,坚持＂预防为主,综合防治＂的植保方针,采取科学有效防治技术措施,综合防控该虫发生为害,才能生产出质量安全的蜜柚,促进平和琯溪蜜柚生产与出口. 相似文献
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平和县是琯溪蜜柚的原产地,琯溪蜜柚更是平和县最重要的经济支柱产业,至2012年全县种植琯溪蜜柚面积达4.33万hm2,产量达100万t以上.自从2003年琯溪蜜柚果品首次打入欧盟市场以来,出口量逐年递增,2010年出口10.8万t,2011年出口11.5万t,2012年出口12.3万t.但由于琯溪蜜柚大面积连片种植、栽培技术水平差异大、管理不规范,各种检疫性病虫及农药残留问题严重地威胁着平和琯溪蜜柚的出口安全.因此,平和县人民政府和漳州出入境检验检疫局,在平和县探索蜜柚出口基地区域化管理新模式,其核心是以平和县政府为蜜柚品质责任主体,以＂区域化连片种植＋区域化综合防控＋区域化联动管理＂为主要内容,由农业技术部门负责规范区域内果农的种植管理,建立生产全过程的可追溯体系,有效控制检疫性有害生物为害和农业化学品使用混乱现象. 相似文献
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Pongnart Nartvaranant 《International Journal of Fruit Science》2018,18(2):215-225
ABSTRACTEffect of 2,4-D and naphthalene acetic acid (NAA) on fruit drop reduction in pummelo cv. Thong Dee was investigated in the pummelo growing areas of Nakhon Pathom province, Thailand. Five similar sized and aged of pummelo trees were selected to set up the experiment. Ten mature branches with the same size from each pummelo tree were randomly selected around the canopy for 2,4-D (20 and 40 mg L?1), NAA (20 and 40 mg L?1) application and control. All treatments were applied to selected pummelo branches 2 times at full bloom and 2 months after fruit set. The results showed that 20 mg L?1 NAA (14.84%) and 40 mg L?1 NAA (12.26%) gave significantly higher percent of fruit retention at 6 months after fruit set. However, leaf total nonstructural carbohydrate concentration analysis showed that 40 mg L?1 2,4-D (104.86 mg g?1) and 20 mg L?1 2,4-D (96.55 mg g?1) gave significantly higher total nonstructural carbohydrate than those in control (78.44 mg g?1). For fruit quality, 40 mg L?1 2,4-D and 20 mg L?1 2,4-D gave the highest peel weight with 435.55 and 358.57 g, respectively, and 40 mg L?1 2,4-D gave the highest peel thickness with 20.25 mm, while 20 mg L?1 NAA gave statistically higher total soluble solid than those in 20 mg L?1 2,4-D and 40 mg L?1 2,4-D. Therefore, 20 mg L?1 of NAA sprayed 2 times at full bloom and 2 month after fruit set effectively reduced fruit drop and increased percentage of fruit retention in pummelo cv. Thong Dee. 相似文献
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沙田柚在不同砧木上的早期表现 总被引：4，自引：1，他引：3
供试品种为沙田柚,砧木材料２８个,以酸柚砧作对照,研究了不同砧木上沙田柚树体生长发育,产量的早期表现。经过７年的观察分析,初步认为关云大叶枳,江津大叶枳,多花枳,朱砂柑、摩洛哥酸橙对沙田柚有早结,矮化作用。定植后第３年试花,第４年开始结果,结果最多的是关云大叶枳,株产达４个,树体高度比对照矮１１．８％￣２１．０％,产量比对照高２４０％￣６００％,其余砧木都比对照结果迟。 相似文献
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以异源四倍体体细胞杂种为父本与二倍体杂交创造柑橘三倍体的研究 总被引：8，自引：3，他引：8
2001～2002连续两年, 以沙田柚、本地早橘、中秋橘、HB柚、国庆4号温州蜜柑等二倍体品种为母本, 以NS (橘柚+无酸甜橙) 、NH (橘柚+ HB柚) 、SH (无酸甜橙+ HB柚) 、VM (伏令夏橙+橘橙) 、HD (甜橙+丹西橘) 等优良四倍体体细胞杂种的花粉授粉, 通过胚挽救技术获得再生植株。经细胞流式仪和染色体计数观察表明, 两年从10个授粉组合中共获得244株三倍体和10株四倍体。在这些三倍体中有147株来自沙田柚为母本的组合。目前已有172株三倍体和4株四倍体植株移栽成活。这些材料为进一步选育无核三倍体品种奠定了基础。 相似文献
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在26S泛素蛋白酶体途径介导的蛋白质降解过程中,RING finger蛋白是一类特殊的泛素蛋白连接酶,参与植物多个生长发育及逆境胁迫响应过程。为探明柚RING finger家族成员的序列特征及表达模式,从红肉蜜柚和琯溪蜜柚果实汁胞中分离出两个RING finger基因cDNA片段（CgRHF1和CgRHF2）,采用实时荧光定量PCR研究其在不同组织及果实发育不同时期的表达模式。结果表明,两个基因均属于RING-H2 finger家族成员,且红肉蜜柚与琯溪蜜柚的两个CgRHF之间碱基序列均无差异;除根组织外,CgRHF1表达水平较CgRHF2高,且在红肉蜜柚茎、叶和花中的表达水平显著高于琯溪蜜柚;CgRHF2在组织及果实发育过程表达水平均较低,但在果实成熟采摘阶段急剧上升。CgRHF1与CgRHF2表达模式的差异暗示这两个基因在柚组织及果实发育进程中行使不同的生物学功能,而非功能互补基因。 相似文献
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Pongnart Nartvaranant 《International Journal of Fruit Science》2019,19(1):91-103
The research was conducted in the pummelo growing areas of Thailand. The results showed that the dropped fruits had a statistically smaller fruit size (7.25 cm) than the retained fruit (9.35 cm; P < 0.05) at 4 months after fruit set. Moreover, the dropped fruits had an abnormal fruit shape when compared to the retained fruits. Consideration of fruit and leaf carbohydrate concentrations showed that the retained fruits had statistically higher carbohydrate concentrations (262 mg g?1) than the dropped fruits (203 mg g?1; P < 0.05). Meanwhile, the dropped fruits had statistically lower leaf carbohydrate concentrations (55 mg g?1) than those in the retained fruits (85 mg g?1; P < 0.05). The retained fruits also had statistically higher N, P, and K concentrations (1.6%, 1.1%, and 1.3%, respectively) than the dropped fruits (1.1%, 0.5%, and 1.0%, respectively; P < 0.05). Therefore, the causes of early fruit drop in pummelo could be insufficient carbohydrate and plant nutrients supplied for fruit growth and development. 相似文献
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在依据柑橘全基因组信息的基础上,针对转座子序列开发了一种适合鉴别柑橘芽变品种的分子技术。以43个柑橘芽变品种和7个普通柑橘品种为材料,采用转座子显示技术(transposon display,TD)对转座子进行多态性分析。结果表明:5个DNA转座子(DTM63、DTM58、Helitron1、Spem和mPing2)和4个反转录转座子(Line1、LTR-Gypsy3、LTR-Gypsy5和Tcs2)可以较好地鉴别柑橘不同芽变品种。罗伯逊脐橙及其早熟芽变品种罗脐35号能被DTM63、Spem和mPing2鉴别;m Ping2能鉴别罗伯逊脐橙/罗脐35号、暗柳/红暗柳、普通椪柑/黔阳无核椪柑,以及红肉琯溪蜜柚/橙皮琯溪蜜柚这4对芽变品种。DNA转座子DTH3在甜橙芽变品种中多态性高,可以鉴别不同的甜橙芽变品种。因此,TD技术是一种值得关注的能有效鉴别柑橘芽变品种的分子标记技术。 相似文献
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Tsuneo Ogata Tomoya Takeichi Kazunori Matsunaga Kojiro Hasegawa Shinzo Yamane Keita Sugiyama 《Scientia Horticulturae》2008
Cross-pollination was performed with soft-X-irradiated hyuga-natsu pollens (1000 Gy) for ‘Tosa-Buntan’ pummelo (Citrus grandis (L.) Osbeck). This resulted in the transformation of large and complete seeds into small and empty ones (practically seedless). Although fruit set, fruit retention, total soluble solids content (TSS) and titratable acidity of the juice were not affected, decrement in the fruit size was observed. Two weeks after the pollination, endosperm cell division with free nuclei began in both the non-irradiated and irradiated pollen treatment conditions. Seven weeks after pollination, endosperm division with the cell wall occurred in the non-irradiated pollen treatment conditions; however, the endosperm development ceased in most ovules that underwent the irradiated pollen treatment, and the ovules remained in their free nuclear stage. The delayed degeneration of the ovules, following successful fertilization and commencement of endosperm cell division, allow these seedless fruits to be categorized as pseudo-parthenocarpic. 相似文献
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Jian Ding Xiu-Xiu Deng Hongyan Zhang Yunjiang Cheng Qiang Xu Qing Liu 《The Journal of Horticultural Science and Biotechnology》2013,88(5):567-573
SummarySix plants with an early juice–sac granulation trait derived from inter-specific protoplast fusions between embryogenic calli of ‘Bonanza’ navel orange (Citrus sinensis [L.] Osbeck) and mesophyll protoplasts of ‘Dahongpao Red’ tangerine (C. reticulata Blanco) were analysed by flow cytometry and by using molecular markers, including simple sequence repeats (SSR) and restriction fragment length polymorphism (RFLP). The results indicated that all six plants were diploids and had inherited their nuclear DNA from the embryogenic callus parent ‘Bonanza’ navel orange. However, an analysis of morphological and fruit characteristics, and measurements of components of the cell walls in the juice-sacs, showed that they were not true-to-type for ‘Bonanza’ navel orange, especially for fruit traits such as juice-sac granulation and navel structure. These results confirmed that these plants were not hybrids, and were more likely to be somaclonal variants that arose during the regeneration of the navel orange protoplasts. These plants will provide material for studying the mechanism of granulation in juice-sacs, a common phenomenon during the storage of pummelo and other citrus fruits. 相似文献
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柚矮化病的品种感病性调查 总被引：2，自引：0，他引：2
以特征性症状春梢叶片扭曲畸形和枝条茎陷点为诊断依据，调查结果表明，５５个柚类品种中有２２个发病，占调查品种数的４０％；２８个沙田柚砧穗组合中有２２个发病，占调查砧穗组合数的７８．５％。以沙田柚实生苗和酸柚实生苗作指示植物，对温州蜜柑上的类似矮化病的叶片扭曲症状进行鉴定的结果，指示植物上表现出与接种沙田柚矮化病病原的指示植物相似的春梢叶片扭曲及茎陷点症状。 相似文献