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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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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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杨小舟蛾是许昌市杨树主要害虫。该文对其卵发育起点温度和有效积温进行了初步研究。结果表明:杨小舟蛾第1代卵发育起点温度和有效积温分别为(11.5±2.54)℃和(38.8±16.65)日℃,为预测预报提供了科学依据。 相似文献
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白蛾周氏啮小蜂的有效积温及发育起点温度研究 总被引：18，自引：0，他引：18
白蛾周氏啮小蜂ＣｈｏｕｉｏｉａｃｕｎｅａＹａｎｇ (膜翅目 ,小蜂总科 :姬小蜂科 )是寄生美国白蛾 (Ｈｙｐｈａｎｔｒｉ ａｃｕｎｅａＤｒｕｒｙ)的有力天敌 (杨忠岐 ,1 989) ,内寄生于美国白蛾的蛹中。为了人工大量在室内饲养繁殖这种寄生蜂用于防治 ,就必须搞清楚它的有效积温和发育起点温度 ,以指导饲养实践。为此我们对白蛾周氏啮小蜂进行了这两个方面的研究。1 材料和方法由于白蛾周氏啮小蜂为内寄生性 ,因此 ,分别研究它的卵、幼虫及蛹的有效积温及发育起点温度比较困难 ,故我们只对其从卵产入美国白蛾蛹中后至成蜂羽化、咬破寄主… 相似文献
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经测定 ,落叶松腮扁叶蜂蛹在自然条件下发育起点温度为 8.3 85 6℃± 0 .5 5 0 2℃ ;有效积温为 1 0 2 .5 41 9± 2 6.5 2 2 9日度。 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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Lu WendaNortheast Forestry University 《林业研究》1991,2(1):79-82
A series of drying tests on Larch Lumber and a theoretical analysis led to the follow-ing conclusions:1.Steaming pretreatment is a very powerful means to decrease defects induced by the drying processand increases the drying velocity of the lumber.2.The steaming—high一temperature drying schedule had resulted in fast drying and good quality ofthe dried lumber. 相似文献
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榆童锤角叶蜂有效积温测定及应用 总被引：3，自引：0，他引：3
在自然变温条件下测定了榆童锤角叶蜂蛹、成虫、卵和幼虫和发育速率、各发育阶段的发育起点温度和有效积温分别建立了蛹、成虫、卵和幼虫的发育进程模型，该模型可用于发生期的预测预报。 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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该文研究了光肩星天牛 Anoplophora glabripennis(Motsch.)世代分化现象 ,测定了卵期、幼虫和蛹期及全世代的发育起点温度和有效积温。结果表明 90 %左右个体为 1年 1代 ,1 0 %左右个体因卵孵化较迟 ,翌年有效积温仍未满足发育需要而形成 2年 1代。卵期、幼虫和蛹期及全世代发育起点温度分别为 1 1 .9± 1 .0 9℃、1 5 .2± 1 .87℃和 1 3.4± 0 .30℃ ,有效积温分别为 1 98.1± 1 5 .1 7日度、1 2 31 .89± 99.95日度和 1 2 6 4.2± 1 88.2 8日度 相似文献