共查询到18条相似文献，搜索用时 78 毫秒
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红脂大小蠹卵和蛹的发育及预测研究 总被引：6，自引：0，他引：6
红脂大小蠹主要侵染 30年生以上和胸径在 10cm以上的油松树和新鲜油松伐桩、伐木。成虫蛀干在坑道内交尾产卵 ,孵化侵食韧皮部、形成层。卵期平均 11.2d ,蛹期平均 12 .4d ,卵和蛹的发育起点温度分别为 14 .86± 0 .6 1℃、12 .32± 1.73℃ ,有效积温分别为 77.5 9±5 .2 7日度、14 4 4 .6 7± 15 .0 2日度 ;根据卵和蛹的形象变化分别将卵、蛹的发育分为 3个阶段和 4个时期。利用期距法、有效积温法及物候法可预测各虫态的发生期 相似文献
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在实验室内以17,20,23,26,29和32℃6个恒温对红脉穗螟天敌——扁股小蜂Elasmussp.各虫态发育起点温度和有效积温进行了测定。结果表明,扁股小蜂的发育历期随温度的升高而缩短;卵、幼虫、蛹和卵-蛹全过程的发育起点温度分别为(12.031±0.659),(11.295±0.302),(10.016±0.811)和(10.976±0.720)℃;有效积温分别为(12.988±0.634),(63.084±1.346),(121.387±6.128)和(191.966±9.637)日.度。 相似文献
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本文介绍了在自然变温和人工变温条件下，测定樟子松木蠹象（Pissodessp.）卵、幼虫、蛹的发育起点温度和有效积温的方法。经测定，卵期发育起点温度和有效积温为10．63±0．38℃、80．17±7．61日度；幼虫发育起点温度和有效积温为11．63±1．32℃。201．69±37．63日度；蛹期发育起点温度和有效积温为13．58±0．94℃、93．99±10．18日度。并对有效积温研究结果进行了验证。 相似文献
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樟子松梢小卷蛾卵和蛹有效积温及发育起点温度的研究 总被引：2，自引：0，他引：2
文章介绍了在自然变温条件下,测定樟子松梢小卷蛾（Rhyacionia pinicolana（Doubleday））卵和蛹发育起点温度和有效积温的方法。经测定,蛹期发育起点温度及有效积温为：12.26士0.83（℃）,120.54土1.27（日度）,卵期发育起点温度及有效积温为：14.19土1.27（℃）;81.64土1... 相似文献
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研究了黄带山钩蛾Oreta pulchripes Butler各虫态在恒温16,19,22,25,28℃下的发育历期、发育起点温度和有效积温.结果表明,随着温度的升高,发育历期逐渐缩短;黄带山钩蛾的卵、幼虫、蛹、成虫期和世代发育起点温度分别为(8.28 ±1.27),(8.47±1.33),(7.20±1.12),(10.70±0.97),(8.40±0.46)℃.相应的有效积温分别为(85.39±7.58),(223.40±20.94),(131.91±9.60),(62.98±5.08),(507.97±16.53)日度.根据发育起点温度和有效积温,初步测得黄带山钩蛾在苏州一带的年发生世代数为7代左右,与实际调查情况基本一致. 相似文献
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根据有效积温和发育起点温度对落叶松鞘蛾蛹和卵发生期提出预测式,其蛹的有效积温的估计区间为63.9±9.7日度,发育起点温度的估计区间为14.6±1.1℃,卵的有效积温的估计区间为279.7±22.8日度,发育起点的估计区间为15.7±0.6℃。蛹期预测式为(?)=(63.9/(T-14.6))±1.9069(SNp=0.7417,自由度为5)卵期预测式为(?)=(279.7/(T-15.7))±3.7932(SNe=1.6039,自由度为7) 相似文献
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灰斑古毒蛾发育起点温度和有效积温研究 总被引：1，自引：0，他引：1
在恒温条件下,观察了18—28℃范围内灰斑古毒蛾Orgyia ericaeGermar的生长发育历期。结果表明,灰斑古毒蛾各虫态的发育历期与温度呈负相关。卵、幼虫、预蛹、雄蛹、雌蛹、雄成虫、蛹至产卵前期(♀)、全代(♀)、全代(♂)发育起点温度分别是12.23±1.12℃,8.96±1.29℃,14.00±0.26℃,10.38±0.26℃,10.09±2.60℃,8.39±0.47℃,10.69±2.11℃和10.27±0.86℃,有效积温分别为166.95±10.11,322.43±37.00,11.50±0.48,125.89±3.37,36.52±16.24,100.08±36.12,723.49±34.25和674.85±44.48日度。温度也影响灰斑古毒蛾幼虫的虫龄,18℃时灰斑古毒蛾幼虫只有5龄,18℃以上幼虫的龄期有6龄。 相似文献
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对杨黄褐锉叶蜂雄性幼虫发育起点温度和有效积温进行研究的结果表明:杨黄褐锉叶蜂雄性幼虫在18、22、26、30℃4个温度下可正常生长发育,而在34℃条件下不能完成发育,不同龄期(共5龄)雄性幼虫的发育起点温度和有效积温存在差异,且不同龄期对二者的要求不一致,有效积温分别为37.68、30.26、29.18、42.55、75.01日·度,发育起点温度分别为6.07、5.61、8.84、8.67、5.50℃。杨黄褐锉叶蜂雄性幼虫期发育起点温度和有效积温分别为6.35℃和220.68日·度,发育历期预测式为N=220.68/(T-6.35)。 相似文献
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Winter chilling is a key environmental trigger of floral induction in temperate Eucalyptus. Over the past two decades, considerable site × eucalypt flowering interaction research has been undertaken over a range of high elevation (>1 100?m asl) forestry sites in the South African summer rainfall area. A practical method of accurately monitoring eucalypt bud temperature at remote sites in these areas was needed for this research. Utilisation of traditional methods of air and bud temperature measurement were not viable, due to significant risks of data and meteorological equipment loss posed by severe weather, vandalism and theft. Between 1996 and 2004, a robust structure for housing the miniature Hobo® temperature logger (hereafter termed ‘Hobo pole’) was designed and utilised for in-field monitoring of air temperature in the research trials. During 2009 and 2010, an experiment was conducted to investigate the relationship between E. nitens bud temperature (BudT), Hobo pole air temperature (HoboAT) and radiation screen air temperature (ScrnAT), and develop appropriate calibration models. Attempts to develop a single model for predicting hourly BudT from hourly HoboAT over the entire annual period yielded unsatisfactory results (maximum R?2 value 0.49). Separate winter and summer regression models were subsequently developed for predicting BudT from HoboAT, ScrnAT from HoboAT, and BudT from ScrnAT. In these regressions, R?2 values were generally slightly higher, and SE values lower, for mid-winter data than for mid-summer data. In mid-winter, BudT on HoboAT gave the highest R?2 value (0.99) and lowest SE value (0.49 °C) of all regressions. The Hobo logger/Hobo pole combination, together with developed regression models (presented in this paper), offers one practical, cost-effective solution for accurately monitoring eucalypt bud temperature at remote, high-elevation forestry sites in South Africa. 相似文献
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选择4种景天属植物,研究其在高温高湿胁迫下的形态特征、生理生化变化及其适应高温高湿的机理。结果表明:随胁迫时间延长,植物叶片细胞膜透性增大,叶绿素总量有明显上升又下降趋势,可溶性蛋白含量下降,保护酶系统的平衡受到破坏,膜脂过氧化程度加重,PRO含量总体呈上升趋势。由主成分分析和隶属函数法得出耐湿热胁迫能力大小为:凹叶景天>胭脂红景天>中华景天>金叶景天。 相似文献
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S. Diamandis 《Forest Pathology》1987,17(6):348-355
Two Euramerican poplar clones, ‘I-214’and ‘I-45/51′, were badly damaged by frost cracks in 1981 and 1985. Thermocouples attached to 12 trees showed that clone ‘I-45/51’was more resistant to winter and late frosts, possibly due to its significantly thicker and rougher bark in comparison to ‘I-214′. 相似文献
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Larch (Larix decidua Mill.) seedlings of a low altitude (600 m) Austrian provenance were raised outdoors and acclimated in chambers for 14 to 24 days during August and September at either 8 degrees C and an atmospheric saturation vapor pressure deficit (DeltaW) of 2.5 Pa kPa(-1), or 24 degrees C and a DeltaW of 6.2 Pa kPa(-1). Subsequently, their rates of photosynthesis, dark respiration and transpiration were measured at temperatures between 5 and 30 degrees C with DeltaW either maintained below 10 Pa kPa(-1) or allowed to increase with temperature up to 38 Pa kPa(-1). Below 15 degrees C the photosynthetic rate of cold-acclimated plants was higher, but above 15 degrees C it was lower, than that of warm-acclimated plants. Temperature acclimation caused a greater shift in the temperature optimum for photosynthesis when DeltaW was kept small than when it was allowed to increase with temperature. When DeltaW was kept small, leaf conductance of cold-acclimated plants, unlike that of warm-acclimated plants, did not increase with temperature above 15 degrees C. When DeltaW increased with temperature, leaf conductance of cold-acclimated plants decreased more rapidly with temperature than that of warm-acclimated plants. Low temperature acclimation increased the rate of photosynthesis below 15 degrees C without affecting leaf conductance, which indicates that there was an adaptation in leaf internal processes. Further evidence of a metabolic adaptation to acclimation temperature is that dark respiration of cold-acclimated plants was twice that of warm-acclimated plants at all temperatures. 相似文献
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