|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | The depositional Environment at Shuidonggou Locality 2 in Northwest China at ~72-18 kaBP显示文摘Shuidonggou site has abundant Paleolithic remains of Late Pleistocene deposition. Studying the evolution of depositional environments is essential to the comprehensive understanding of the living conditions of ancient populations. To reconstruct the depositional environment at Shuidonggou, we carried out archaeological excavations and collected systematic deposition samples at the key position of Shuidonggou Locality 2 for grain size analysis and sporopollen statistics. The environmental evolution around the Shuidonggou site generally underwent four stages at ~72-18 kaBP. During the first stage (~72-41 kaBP), the river developed with gravel and sand stratums. During the second stage (41~34 kaBP), a swamp with numerous aquatic plants formed. In the third stage (34-29 kaBP), site formation was characterized by shallow lake depositional conditions; the climate was relatively warm and humid. The marginal bank depositional conditions deteriorated during the fourth stage (29-18 kaBP), and the site underwent several dry events; the climate also became drier and colder. | LIU Decheng GAO Xing LIU Enfa PEI Shuwen CHEN Fuyou ZHANG Shuqin | 2012 | Acta Geologica Sinica(English Edition)2012，86，6： | 2 |
| 2 | Occurrence Regularity and Sexual Pheromone Trapping Effect of Spodoptera litura in Field in Central Guizhou显示文摘The Spodoptera litura occurrence quantity in Tianlong Town,Pingba County,Anshun City was dynamically monitored by an insect sex pheromone electronic measurement and forecast system in 2015 and 2016 and the trapped effect of S. litura was studied by the home-made S. litura sex pheromone traps in Baishiyan Town,Ziyun County and Tianlong Town,Pingba County in 2016 to accurately grasp the occurrence regularity of S. litura and apply insect sex pheromone for controlling S. litura in Central Guizhou tobacco-growing region. There are 5 generations of S. litura in a year in Central Guizhou region. The first generation of S.litura occurs from late April to middle May,the second from middle-to-late July to middle-to-late August,the third from early-to-middle August to the end of September,the fourth is in the end of October and the fifth in the end of November. S. litura emigrates or enters into the overwintering stage in December. S. litura is almost in active in the daytime during the peak occurrence period of S. litura adults. The first mating time of S. litura is at 17: 30 and its peak mating time is about 22: 00. The second mating time of S. litura is at 1: 00-5: 00 and its peak mating time is about 2: 30. The trapped S. litura quantity presents an obvious layer-belt distribution that the number in the outer ring is significantly higher than that in the middle ring,and the number in the middle ring is significantly higher than that in the inner ring. The number of trapped S. litura is higher around the outer ring of the testing field and at the draught position than in the low-lying land and inner flat ground. | Chengping FAN Enfa CHEN Junming YUE Wang YIN Rui ZUO Lishi ZUO | 2019 | Agricultural Biotechnology2019，8，1： | 1 |
| 3 | Toxicity Test of Different Pesticides on Tobacco Root-knot Nematodes显示文摘[Objectives]This study was conducted to quickly screen out effective and safe agents for controlling tobacco root knot nematode disease.[Methods]Six pesticides were tested and screened indoors at five different concentrations.[Results]The six pesticides all had toxic effects on the second-instar larvae of tobacco root-knot nematode,and the corrected mortality was positively correlated with the concentration and time of the pesticides,with the correlation coefficients above 0.8.From the perspective of inhibitory activity,the order was fosthiazate>abamectin>emamectin benzoate>cadusafos>ethoprophos>carbosulfan.Four pesticides that can be used in the field were selected.[Conclusions]This study provides a theoretical basis for field pesticide selection. | Fei DAI Peibo LI Quan ZHANG Enfa CHEN | 2020 | Agricultural Biotechnology2020，9，5： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员