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落叶松早期落叶病
相关语句
  needle cast of larch
     Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density.
     早霜、晚霜、松毛虫、叶蜂及落叶松早期落叶病等都能直接影响鞘蛾食物的质量和数量,进而间接地使鞘蛾种群密度降低。
短句来源
  “落叶松早期落叶病”译为未确定词的双语例句
     A survey on the occurrence of Mycosphaerella larici-leptolepis Ito, Sato, & Ota on Laricis spp. in North-East provinces
     东北及内蒙地区落叶松早期落叶病的调查
短句来源
     PRELIMINARY STUDIES ON THE DISPERSAL PATTERN OF ASCOSPORES OF MYCOSPHAERELLA LARICI. LEPTOLEPTIS AND THE EFFECTS OF FUNGICIDAL CONTROL
     落叶松早期落叶病子囊孢子扩散形式及药剂防治试验的初步研究
短句来源
     STUDY ON THE LOSS CAUSED BY LARCH LEAF-CAST, DISEASE FORECAST AND THE CONTROL TARGET
     落叶松早期落叶病(Mycosphaerella larici-leptolepis)的病害损失、预测预报及防治指标的研究
短句来源
  相似匹配句对
     A survey on the occurrence of Mycosphaerella larici-leptolepis Ito, Sato, & Ota on Laricis spp. in North-East provinces
     东北及内蒙地区落叶松早期落叶病的调查
短句来源
     PRELIMINARY STUDIES ON THE DISPERSAL PATTERN OF ASCOSPORES OF MYCOSPHAERELLA LARICI. LEPTOLEPTIS AND THE EFFECTS OF FUNGICIDAL CONTROL
     落叶松早期落叶病子囊孢子扩散形式及药剂防治试验的初步研究
短句来源
     The Early Stage Selection Technology for Family System of Larix olgensis
     日本落叶松家系早期选择技术
短句来源
     STUDY ON EARLY SELECTION OF LARIX OLGENSIS
     长白落叶松早期选择的研究
短句来源
     STUDY ON THE LOSS CAUSED BY LARCH LEAF-CAST, DISEASE FORECAST AND THE CONTROL TARGET
     落叶松早期落叶病(Mycosphaerella larici-leptolepis)的病害损失、预测预报及防治指标的研究
短句来源
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  needle cast of larch
Early and late frosts, larch caterpillar, sawfly and needle cast of larch could reduce the food quality and quantity of larch casebcarer and had indirect effects on population density.
      


The needle-cast disease of Laricis leptolepis caused by the fungus Mycosphaerella laricileptolepis Ito, Sato, and Ota, is widely distributed in North-East provinces. The primary infection of the pathogen is mainly the ascospores from the fallen leaves on the ground during the spring. In order to determine the distance of its vertical and horizontal discharge of the spores from the perithecia, a simple spore-trapping method was designed by exposing the glass slides in six directions, placed in three different...

The needle-cast disease of Laricis leptolepis caused by the fungus Mycosphaerella laricileptolepis Ito, Sato, and Ota, is widely distributed in North-East provinces. The primary infection of the pathogen is mainly the ascospores from the fallen leaves on the ground during the spring. In order to determine the distance of its vertical and horizontal discharge of the spores from the perithecia, a simple spore-trapping method was designed by exposing the glass slides in six directions, placed in three different locations and six different heights. Preliminary data showed that the ascospores could reach a height of 55 meters and a distance of 1600 meters along the wind direction. Among the 20 fungicides tested in the field on both young and large trees, 0.5°Bê limesulphur spray employed three times at 2-weeks interval gave a very good control. A ground spray on fallen leaves by six different fungicides did not give satisfactory results although 3°Bê lime-sulphur and lime (20 grams per tree) appeared to be better than dinitro-phosphatemethyl-phenol.

落叶松早期落叶病子囊孢子在空中的扩散,在长春地区,以7月份为盛期。林外水平距1600米及垂直高55米处均可捕捉到不低于林内孢子的数量,其方向符合夏季主风方向。噴药防治的效果,无論成林或幼林,均以0.5度石灰硫黄合剂最好,尤其噴药3次的更佳。地面噴药抑止产生子囊壳,以3度石灰硫黄合剂及每株20克石灰比二硝基磷甲酚效果好。

The increasing of the population of C. dahurica was controlled by comprehensive factors of wind, foods, predators and the density of its self. Spring wind caused 27% of larvae on crown to fall down. Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density. Birds, ants and spites were the main predators or C. dahurica and Ptermalidae, Eulophidae, Ichneumonidae and Braconidae...

The increasing of the population of C. dahurica was controlled by comprehensive factors of wind, foods, predators and the density of its self. Spring wind caused 27% of larvae on crown to fall down. Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density. Birds, ants and spites were the main predators or C. dahurica and Ptermalidae, Eulophidae, Ichneumonidae and Braconidae etc. were parasitic predators. Self-adjustment of population caused by self-population density was an important factor to promote evolution and development of the population, but it only occurcd at high density.

鞘蛾种群数量不可能无限制增长,其原因是多方面因素综合作用的结果。风、食物、天敌及鞘蛾的自身密度等对鞘蛾的数量增长都有明显的抑制作用。春风能使树冠上27%左右的鞘蛾幼虫落地;早霜、晚霜、松毛虫、叶蜂及落叶松早期落叶病等都能直接影响鞘蛾食物的质量和数量,进而间接地使鞘蛾种群密度降低。捕食鞘蛾的天敌主要有鸟类、蚂蚁和蜘蛛;寄生性天敌多属于金小蜂科(Pteromalidae)、姬小蜂科(Eulophidae)、姬蜂科(Ichneumonidae)及茧蜂科(Braconidae)等。由鞘蛾自身密度所引起的自我调节是促使种群进化发展的重要因素之一,但是,这种因素的作用只有在密度大的时候方能显现出来。

 
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