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1.
采用6种杀菌剂对西瓜炭疽病进行田间药效试验。3次药后试验结果表明:50%咪鲜胺锰盐可湿性粉剂和25%吡唑醚菌酯乳油效果最好,防效在73%以上;10%苯醚甲环唑水分散粒剂和25%溴菌腈可湿性粉剂防效次之,防效在67%以上;50%多菌灵可湿性粉剂和80%代森锰锌可湿性粉剂防效较差,防效为50%左右。药剂处理后,50%咪鲜胺锰盐可湿性粉剂、25%吡唑醚菌酯乳油和对照,中心可溶性固形物含量分别为11.8%、12.0%、9.8%;两种药剂比对照分别增产30.96%、28.26%,增产效果显著。因此,推荐50%咪鲜胺锰盐可湿性粉剂和25%吡唑醚菌酯乳油为目前防治西瓜炭疽病的理想药剂。 相似文献
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为筛选防治葡萄炭疽病的高效、低残留药剂,采用菌丝生长速率法,测定17种杀菌剂对葡萄炭疽病菌的抑制作用,选择抑菌效果较好的5种药剂进行田间药效试验和残留安全性评价。室内药剂抑菌结果表明,代森锰锌、戊唑醇、吡噻菌胺、咪鲜胺和苯醚甲环唑对葡萄炭疽菌的抑菌效果较好,菌丝生长抑制率均在86%以上。田间药效试验结果表明:450g/L咪鲜胺水剂1200倍液防效最高,达93.7%;80%代森锰锌可湿性粉剂500倍液和430g/L戊唑醇悬浮剂2000倍液防效在88.4%以上;20%吡噻菌胺悬浮剂1500倍液和25%苯醚甲环唑悬浮剂1000倍液防效在86.5%以上。农药残留分析结果表明,除吡噻菌胺在葡萄上尚没有制定相应的最大残留限量而无法作出评价外,代森锰锌、戊唑醇、咪鲜胺和苯醚甲环唑农药残留量均符合国家食品安全标准(GB2763—2021)。 相似文献
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以14种加工番茄为试材,采用室内毒力测定与田间药剂防效试验,研究了5种药剂对加工番茄细菌性斑点病的防治效果及番茄抗病性。结果表明:30%烯酰·咪鲜胺抑菌效果较好,抑菌率为73.88%;6%春雷霉素、56.7%氢氧化铜、30%烯酰·咪鲜胺和47%春雷王铜毒力相对较强,EC50分别为8.7、9.6、10.4、10.9mg·mL~(-1)。田间药剂防效试验表明,56.7%氢氧化铜、47%春雷王铜和30%烯酰·咪鲜胺对细菌性斑点病的防效均在60.00%以上,其中30%烯酰·咪鲜胺防效较高为69.66%。供试的14种加工番茄品种中,有1个抗病品种、9个耐病品种、4个感病品种。 相似文献
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不同杀菌剂对万年青炭疽病的室内抑菌作用及田间药效研究 总被引：4，自引：0，他引：4
以采用生长速率法测定了7种杀菌剂对万年青炭疽病病原菌的室内抑制作用,并进行田间药效试验,以进一步验证试验结果。结果表明:25%咪鲜胺、45%咪鲜胺、己唑醇、吡唑醚菌酯对病菌的抑制率均为100%,效果最好;苯醚甲环唑的防效次之;甲基托布津的抑制率虽然比嘧菌酯的高,但是甲基托布津不抑制分生孢子的产生;田间试验结果表明,25%咪鲜胺、45%咪鲜胺、己唑醇、吡唑醚菌酯防治万年青炭疽病效果均较好,可以交替使用,苯醚甲环唑的防效次之,嘧菌酯和甲基托布津的防效无显著差异,防效较差。 相似文献
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8种杀菌剂防治梨黑星病试验 总被引：1，自引：0，他引：1
田间防治试验结果表明,40%福星(氟硅唑)乳油9000倍液防效明显好于其他药剂,防效在95%以上;10%苯醚甲环唑水分散粒剂6000倍液、30%己唑醇悬浮剂7500倍液、25%戊唑醇水乳剂2500倍液和40%腈菌唑悬浮剂9000倍液防效为88%～92%,并且田间表现出对梨黑斑病有一定的控制作用;50%苯菌灵可湿性粉剂800倍液、80%代森锰锌可湿性粉剂800倍液和50%多菌灵可湿性粉剂600倍液防效稍低。生产上建议在果树萌芽期彻底清除病芽梢,于花后10天开始施药,各药剂交替使用。 相似文献
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《中国瓜菜》2021,(6)
为解决生产中缺少防治马铃薯黑痣病的有效化学药剂问题,采用生长速率法测定了10种药剂对供试马铃薯黑痣病菌立枯丝核菌(Rhizoctonia solani Kühn)菌株的室内毒力,并选择活性较好的5种药剂进行田间防效试验。结果表明,50%咪鲜胺铜盐SC、20%吡噻菌胺SC、42.8%氟菌·肟菌脂SC、25 g·L~(-1)咯菌腈FS以及50%异菌脲WP毒力较强,EC_(50)值分别为0.076 2、0.689 9、0.722 1、0.900 3和0.925 1μg·mL~(-1);这5种药剂对马铃薯黑痣病也具有一定的防效,其中50%咪鲜胺铜盐SC和25 g·L~(-1)咯菌腈FS对马铃薯黑痣病的防效较好,对马铃薯植株和薯块黑痣病的防效均在78%以上。 相似文献
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AIM: Although endovascular radiotherapy inhibits neointimal hyperplasia, the exact alterations induced by β-particles irradiation remain to be elucidated. The objective of this study was to investigate the ability and the cellular mechanism of local β-particles emission from 188Re to inhibit vascular smooth muscle cells (SMCs). METHODS: The SMCs in vitro were irradiated by 188Re with single doses of 2.6 Gy-25.8 Gy. The effects of β-particles on SMCs, such as effective irradiate doses, the period of inhibition for SMCs proliferation, the changes of cell proliferation rate and DNA synthesis rate, cell cycle progression and related gene expression, were investigated by cell count, [3H]-TdR incorporation, cell cycle progression analysis, cell viability and immunocytochemistry, respectivecy. RESULTS: β-particles irradiation with dose of 5.2 Gy could inhibit significantly SMCs proliferation. At dose of 20.6 Gy DNA synthesis inhibitory rate was 92%, SMCs proliferation rate was only 3%. Renoval of 188Re did not abolish the inhibitory effects of β-particles on SMCs proliferation. The expression of P53 was up regulation and PCNA was down regulation after irradiation. CONCLUSION: β-particles from 188 Re was significantly effective and permanent in inhibiting SMCs proliferation, and inhibitory effect was in dose-dependet manner ED50was 5 Gy, the best dose to inhibit SMCs proliferation was 20 Gy. β-particles irradiation induced SMCs to occur G0/G1 arrest, damaged the ability of SMCs reproliferation and led to cell clonogenic death. P53 and PCNA had regulatiory effects on SMCs proliferation after β-particles irradiation. 相似文献
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多效唑对猕猴桃离体试管苗生长及内源激素的影响 总被引：18，自引：0，他引：18
多效唑（ＰＰ３３３）处理猕猴桃试管苗，降低了其生长强度；植株体内的ＧＡ３、ＩＡＡ和ＺＴ含量下降，ＡＢＡ的含量上升，乙烯释放率增加；并且能降低外源的ＧＡ３和ＩＡＡ促进生长的作用，而外源的ＧＡ３和ＩＡＡ又能不同程度地逆转多效唑的抑制作用，使植株恢复生长。 相似文献
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HU Zhi-cheng ZHU Jia-yuan ZHU Bin GUO Dong CHEN Bin ZHANG Kai HU Kun-hua LI Ming-tao TANG Bing 《园艺学报》2011,27(9):1802-1806
AIM: To investigate and screen the sensitive proteins in the formation mechanism of pathological scars by comparing the results of differential proteomic analysis between pathological scars and normal skin.METHODS: Two-dimensional gel electrophoresis was used to detect the protein expression profiles in 8 keloid patients, 8 hypertrophic scar patients and 3 matched normal skin patients.The proteins that showed differential expression of over 4-fold change were cut and analyzed by MALDI-TOF/TOF mass spectrometry.RESULTS: A two-dimensional protein profiling comparison between pathological scars and normal skin was successfully established.On average, 2 978 spots in keloid, 2 975 spots in hypertrophic scar and 3 053 spots in normal skin were identified using gel analysis software.Compared with normal skin, there were totally 36 differentially-expressed proteins in keloid and hypertrophic scar identified from the spots of over 4-fold change, including 16 proteins in both keloid and hypertrophic scar (8 up-regulated and 8 down-regulated), 11 only in keloid (9 up-regulated and 2 down-regulated) and 9 only in hypertrophic scar (4 up-regulated and 5 down-regulated).CONCLUSION: Proteomic analysis can identify the proteins with variance of pathological scars versus normal skin, thus providing probable new clues to reveal the formation mechanism of pathological scars. 相似文献
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Duncan Brean W. Boyle Shannon Breininger David R. Schmalzer Paul A. 《Landscape Ecology》1999,14(3):291-309
Historic landcover dynamics in a scrubby flatwoods (Tel-4) and scrub landscape (Happy Creek) on John F. Kennedy Space Center were measured using aerial images from 1943, 1951, 1958, 1969, 1979, and 1989. Landcover categories were mapped, digitized, geometrically registered, and overlaid in ARC/INFO. Both study sites have been influenced by various land use histories, including periods of range management, fire suppression, and fire management. Several analyses were performed to help understand the effects of past land management on the amount and spatial distribution of landcover within the study sites. A chi-squared analysis showed a significant difference between the frequency of landcover occurrence and management period. Markov chain models were used to project observed changes over a 100-year period; these showed current management practices being effective at Tel-4 (restoring historic landscape structure) and much less effective at Happy Creek. Documenting impacts of past management regimes on landcover has provided important insight into current landscape composition and will provide the basis for improving land management on Kennedy Space Center and elsewhere. 相似文献
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AIM: Previous studies performed with XBP-01 in vitro indicated that XBP-01 could inhibit vascular smooth muscle cells from being transformed into foam cell and could eliminate the atherosclerotic plaque in C57BL/6J mouse. This experiment is to investigate its mechanism of eliminating plaques in vitro. METHODS: The cultured porcine artery smooth muscle cells incubated with XBP-01 of 0.1 mg/L for 24 h after preincubated with oxidized low density lipoprotein of 15 mg/L for 72 h in vitro. The samples were analyzed by fluorescence microscope, confocal microscope system and flow cytometry. RESULTS: Apoptosis was triggered by being incubated with oxidized low density lipoprotein and this process was accelerated additionally by being incubated with XBP-01. CONCLUSION: XBP-01 can be effective in eliminating atherosclerotic plaque by accelerating the process in which oxidized low density lipoprotein induced smooth muscle cell apoptosis. 相似文献
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Species distribution models (SDMs) often use elevation as a surrogate for temperature or utilise elevation sensitive interpolations
from weather stations. These methods may be unsuitable at the landscape scale, especially where there are sparse weather stations,
dramatic variations in exposure or low elevational ranges. The goal of this study was to determine whether radiation, moisture
or a novel estimate of exposure could improve temperature estimates and SDMs for vegetation on the Illawarra Escarpment, near
Sydney, Australia. Forty temperature sensors were placed on the soil surface of an approximately 12,000 ha study site between
November 2004 and August 2006. Linear regression was used to determine the relationship with environmental factors. Elevation
was correlated more with moderate temperatures (winter maximums, summer minimums, spring and autumn averages) than extreme
temperatures (summer maximums, winter minimums). The correlation (r
2) between temperature and environmental factors was improved by up to 0.38 by incorporating exposure, moisture and radiation
in the regressions. Summer maximums and winter minimums were predominately determined by exposure to the NW and coastal influences
respectively, while exposure to the NE and SW was important during other seasons. These directions correspond with the winds
that are most influential in the study area. The improved temperature estimates were used in Generalised Additive Models for
37 plant species. The deviance explained by most models was increased relative to elevation, especially for moist rainforest
species. It was concluded that improving the accuracy of seasonal temperature estimates could improve our ability to explain
the patchy distribution of many species.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users. 相似文献
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AIM: To detect the expression of cytoplasmic inhibitor of apoptosis protein 2 (c-IAP2) and growth arrest-specific gene 1 (GAS1) in Hodgkin's lymphoma (HL) and anaplastic large cell lymphoma (ALCL) and to investigate the role of two genes in the pathogenesis of HL and ALCL.METHODS: HE staining, the antibodies CD30, CD15, CD45RO and CD20 were used to screen the cases of HL and ALCL from 288 cases of lymphoma. The clarified HL and ALCL were subjected for immunohistochemical staining by SP and ABC methods to analyze the expression of c-IAP2 and GAS1. RESULTS: ①The positive rate of c-IAP2 in HL was 25/26(96.1%) while that in ALCL was 6/19(31.6%), there presented statistic significance between HL and ALCL groups(P<0.05), meanwhile the positive rate of GAS1 showed statistic significance between HL and ALCL groups(P<0.05). ②Two cases were showed to be a mixed type combined with large tumor cells of HL and relatively smaller tumor cells of ALCL.CONCLUSION: ①The different expression of c-IAP2 and GAS1 in HL and ALCL implied a different mechanism of oncogenesis and the different defects in the pathway of signal transduction of apoptosis in HL and ALCL;②Few cases showed an overlap and a likely transitional state between HL and ALCL; ③The different expressing manner of GAS1 and c-IAP2 in HL and ALCL implied the potential marks for the differential dignosis of two kinds of lymphoma. 相似文献
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Effects of patch attributes, barriers, and distance between patches on the distribution of a rock-dwelling rodent (Lagidium viscacia) 总被引：1，自引：0，他引：1
We tested whether size of habitat patches and distance between patches are sufficient to predict the distribution of the mountain
vizcacha Lagidium viscacia a large, rock-dwelling rodent of the Patagonian steppe Argentina, or whether information on other patch and landscape characteristics
also is required. A logistic regression model including the distance between rock crevices and depth of crevices, distance
between a patch and the nearest occupied patch, and whether or not there was a river separating it from the nearest occupied
patch was a better predictor of patch occupancy by mountain vizcachas than was a model based only on patch size and distance
between patches. Our results indicate that a simple metapopulation analysis based on size of habitat patches and distance
between patches may not provide an accurate representation of regional population dynamics if patches vary in habitat quality
independently of patch size and features in the matrix alter connectivity.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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Zusammenfassung Die Leistungsprüfungen wurden im Zeitraum 1997 bis 2003 mit den Unterlagen Gisela 4 und 5, den Klonnummern 195/20 und 497/8 aus der Gisela-Serie sowie Weiroot 10, 13, 53, 72 und 158 durchgeführt. Dabei dienten Sämlinge von P1 (bulgarische Selektion aus Prunus mahaleb) als Kontrolle. Alle Unterlagen waren mit der Sorte Stella veredelt und im Dezember 1996 in der Versuchsanlage der Agraruniversität in Plovdiv, Bulgarien, im Abstand von 6 m×4,5 m gepflanzt worden. Dabei erfolgte ein Pflanzschnitt. Nach Abschluss der natürlichen Kronenentwicklung wurde jedes Jahr ein Winterschnitt vorgenommen. Der Boden wurde durch mechanische Bearbeitung offen gehalten und nach dem 4. Standjahr wurden die Baumstreifen mit Herbiziden behandelt. Die Wasserversorgung erfolgte durch eine dem natürlichen Gefälle folgende Überflutung, allerdings nicht immer zum optimalen Zeitpunkt, da keine eigene Wasserquelle zur Verfügung stand.Basierend auf den Ergebnissen bis zum Anfang des 7. Standjahres können die untersuchten Unterlagen in zwei Gruppen differenziert werden: starkwüchsig—Weiroot 10, P1 und Weiroot 13; mittelstarkwachsend bis schwachwüchsig—Gi 497/8, Gisela 4, Weiroot 53, Weiroot 158, Gi 195/20, Weiroot 72 und Gisela 5. Letztere zeichnete sich durch besondere Schwachwüchsigkeit aus. Die meisten Wurzelschosser bildeten Gisela 4, Weiroot 10 und Weiroot 13. Weiroot 53, Weiroot 72 und Weiroot 158 entwickelten deutlich weniger und P1, Gisela 5, Gi 195/20 sowie Gi 497/8 keine Wurzelschosser. Den frühesten Blühbeginn induzierte Gisela 4. Die anderen Unterlagen führten, in Abhängigkeit von den Temperaturbedingungen des jeweiligen Jahres, zu einer Verspätung der Blüte: P1 und Weiroot 10 um 1–2 Tage; Gi 497/8, Weiroot 13 und Weiroot 158 um 2–4 Tage; Weiroot 72 um 2–7 Tage; Gi 195/20 um 3–6 Tage; Weiroot 53 um 3–8 Tage und Gisela 5 um 3–10 Tage. Die Reifezeit der Früchte war bei den Bäumen auf Gisela 5 im Vergleich zu den anderen Varianten um 2–3 Tage verspätet. Gisela 5, Weiroot 72 und Gisela 4 induzierten bei der aufveredelten Sorte die höchsten Ertragsleistungen, P1 die geringsten. Bei den Bäumen auf Gisela 5 war die Fruchtgröße geringer als bei den anderen Unterlagen. Bäume auf Gisela 5 brauchen intensive Pflege. Nur wenn alle Produktionsfaktoren und kulturtechnischen Maßnahmen optimiert werden, kann das hohe Ertragspotenzial dieser Unterlage ausgeschöpft werden. 相似文献
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