湿度调控对番茄灰霉病菌侵染的影响   总被引：5，自引：0，他引：5  

李宝聚  陈立芹  孟伟军  王福建 《植物病理学报》2003,33(2):167-169

 番茄灰霉病菌(Botrytes cinerea)的分生孢子萌发需要高湿的环境,一般要求相对湿度在80%以上或水滴中萌发最好。在适温下,随着湿度的增加,病菌致病性增强,孢子在相对湿度85%以上、菌丝在相对湿度80%以上的高湿环境能够发生侵染,并形成危害性的软腐斑。在一天中高湿的时间直接影响番茄灰霉病的发生,高湿(相对湿度超过85%)时间8h以上病菌才能够连续侵染。  相似文献   

亏缺灌溉对樱桃番茄产量和品质的影响   总被引：40，自引：4，他引：40  

刘明池  陈殿奎 《中国蔬菜》2002,1(6):4-6

通过控制灌溉间隔将土壤水分控制在不同的水平上 ,研究了亏缺灌溉对樱桃番茄产量形成和果实品质的影响。随着土壤水分的降低 ,单果质量和产量逐步减少 ,但亏缺灌溉对结果数的影响不大。亏缺灌溉提高了果实可溶性固形物含量 (Brix)、滴定酸度、糖酸比、VC含量 ,并明显提高了水分的生产率。  相似文献   

樱桃番茄新品种圣果的选育   总被引：2，自引：0，他引：2  

方凌  张其安  董言香  赵贵云  廖华俊 《中国蔬菜》2002,1(4):25-26

圣果系以引进品种或材料 ,经多代复合杂交新育成的适合保护地栽培的樱桃番茄一代杂种。该品种属无限生长类型 ,早熟优质 ,可溶性固形物含量 9%～ 9.5 %。抗TMV、枯萎病、叶霉病和早疫病。果实椭圆形 ,红色 ,整齐 ,耐贮运。单果质量 14～ 16g ,综合性状超过台湾圣女。目前已在安徽省及其周边省份示范推广  相似文献   

Similarity between Copper Resistance Genes from Pseudomonas syringae pv. actinidiae and P. syringae pv. tomato     

Masami NAKAJIMA  Masao GOTO  Tadaaki HIBI 《Journal of General Plant Pathology》2002,68(1):68-74

Twenty-eight strains of Pseudomonas syringae pv. actinidiae isolated in 1984, 1987 and 1988 from kiwifruit orchards in Japan were tested for their resistance to copper sulfate. All strains isolated in 1984 were copper sensitive with a minimum inhibitory concentration (MIC) of cupric sulfate of 0.75 mM. However, some strains isolated in 1987 and 1988 were resistant, with the MIC ranging from 2.25 to 3.0 mM. All copper-resistant strains contained at least one of two plasmids, pPaCul (about 70.5 kb) or pPaCu2 (about 280 kb), or both. In a copper-resistant strain Pa429, the location of the copper-resistance gene(s) was examined by insertional inactivation with Tn5. The MIC of copper sulfate in the copper-sensitive mutant obtained by Tn5 tagging decreased from 2.75 to 0.75 mM. The 14.5 kb BamHI fragment, designated pPaCuB14, containing the same locus mutagenized with Tn5 was cloned from pPaCu1. However, pPaCuB14 did not confer copper resistance in the transformant of copper-sensitive strain Pa21R, suggesting that this clone did not contain a full set of copper-resistance gene(s). Then a cosmid library of pPaCu1 was constructed and six cosmid clones hybridized with pPaCuB14 were selected. One of the six cosmids, designated pPaCuC1, conferred a near wild-type level of copper resistance in the transformant of the copper-sensitive strain. pPaCuC1 had a homologous region that hybridized with all of the PCR-amplifled fragments of copA, copB, copR, and copS genes of P. syringae pv. tomato. DNA sequence analysis of the homologous region revealed the existence of four open reading frames (ORF A, B, R and S) oriented in the same direction. The predicted amino acid sequences of ORF A, B, R and S had 80, 70, 97 and 95% identity with CopA, B, R and S of P. syringae pv. tomato, respectively. Received 5 July 2001/ Accepted in revised form 27 September 2001  相似文献   

Survival of Clavibacter michiganensis ssp. michiganensis in infected tomato stems under natural field conditions in California, Ohio and Morocco     

M. Fatmi  N. W. Schaad † 《Plant pathology》2002,51(2):149-154

The survival and half-life of Clavibacter michiganensis ssp. michiganensis ( C. michiganensis ), the causal agent of bacterial canker of tomato, were determined in infected plant debris under natural field conditions in California, Ohio and Morocco using a semiselective agar medium. The organism survived significantly longer in tomato stems left on the soil surface than in stems buried in the soil at all locations studied. The pathogen was recovered in high amounts from tomato stems left on the soil surface for 314 days in Ohio and California, USA, and for 194 and 132 days in Melk Zhar and Aït Melloul, Morocco, respectively; it was recovered from stems buried in the soil for up to 314 days in Ohio, up to 240 days in California, and up to 60 days in Aït Melloul and Melk Zhar. The half-life of the pathogen in stems left on the soil surface ranged from 23·2 to 24·8 days in the USA, and from 7·8 to 12·3 days in Morocco, whereas the half-life in buried stems ranged from 14·0 to 16·7 days in the USA and from 3·7 to 9·5 days in Morocco. Based on the half-life data, the predicted survival times of C. michiganensis in stems on the soil surface in Ohio, California, Melk Zhar and Aït Melloul would be up to 822, 770, 424 and 261 days, respectively, while the predicted survival times in stems buried in the soil would be 541, 497, 305 and 128 days, respectively. These results show that the survival and half-life of C. michiganensis in plant debris are relatively long and are influenced by both tissue exposure and geographic location.  相似文献   

土壤水分对番茄褐变型筋腐病发生的影响   总被引：1，自引：0，他引：1  

齐红岩  须晖  李天来 《中国蔬菜》2000,1(3):4-0

在日光温室内 ,以番茄品种佳粉 10号为试材 ,研究了土壤水分对番茄褐变型筋腐病发生的影响。结果表明 :在本试验土壤条件下 ,土壤含水量长期处于 16 %以上的高水分状态下 ,可使番茄筋腐病的发病率和病情指数显著增加 ,这可能与番茄植株根系发育不良及根系活力下降有关  相似文献   

氯化钙浓度对番茄硬度的影响     

张凤芸  邹明娟 《黑龙江农业科学》2008,(4):47-49

为了提高番茄硬度延长番茄的贮藏时间,采用随机区组法运用不同浓度的氯化钙,在番茄不同生育期进行叶面喷施。通过统计分析研究得出,1%氯化钙在初花期、初果期喷施,是适宜浓度和最佳时期的最佳组合。  相似文献   

对以色列加工型番茄肥水管理的探讨   总被引：2，自引：1，他引：1  

杨鹏  任玲玲 《内蒙古农业科技》2008,(3):60-61

文章阐述了以色列加工型番茄的栽培技术在施肥、灌溉时，根据植株不同生长时期所需的水分及不同元素进行补给．尤其是根据植株的生长势和土壤的蒸发量的变化来确定灌溉量，根据营养生长期和生殖生长期作物所需的N、P、K不同而确定施肥量，结合不同品种，合理制定生产管理计划和品种布局，为中国不同地区种植加工型番茄在肥水思路方面提供一定启示。  相似文献   

土壤水分对越冬番茄叶片H2O和CO2交换特性的影响     

高方胜  王磊  张红 《北方园艺》2009,(1)

以"L402"为试材,研究了土壤水分对越冬番茄光合及蒸腾特性的影响.结果表明:越冬番茄全生育期内的Pn、Tr以50%处理最低,但65%和80%处理无显著差异,且均无光合午休;LWUE则以50%处理较高,80%处理最低.越冬番茄土壤水分管理以控制在65%为宜.  相似文献   

1-MCP对樱桃番茄采后贮藏特性的影响   总被引：2，自引：0，他引：2  

杨绍兰  张新富  郭春丽  王富  王然 《北方园艺》2009,(3)

采用乙烯抑制剂1-MCP(1-甲基环丙烯)处理采后樱桃番茄果实.结果表明:1-MCP处理可较好地保持Vc含量和总酸含量,抑制可溶性固形物含量的上升,同时1-MCP处理的果实失重率及腐烂率低于对照.  相似文献