【摘 要】
：
在我国,苹果蠹蛾主要分布于新疆、甘肃等地,近年来危害十分严重。为了筛选对苹果蠹蛾毒力大、防效好的生物药剂,为其防治提供可靠依据,西北农林科技大学和陕西省植物保护工作
论文部分内容阅读
在我国,苹果蠹蛾主要分布于新疆、甘肃等地,近年来危害十分严重。为了筛选对苹果蠹蛾毒力大、防效好的生物药剂,为其防治提供可靠依据,西北农林科技大学和陕西省植物保护工作总站研究人员近期选用7种药剂进行了室内毒力测定
In China, codling moths are mainly distributed in Xinjiang, Gansu and other places, and the harm has been very serious in recent years. In order to screen for the virulence of Cydia pomonella, effective control of biological agents, to provide a reliable basis for its prevention and control, Northwest A & F University and Shaanxi Plant Protection Station researchers recently selected seven kinds of agents for indoor toxicity determination
其他文献
Supramolecular chemistry provides a means to integrate multi-type molecules leading to a dynamic organization.The study of functional nanoscale drug-delivery sy
土壤含水量在农田和小流域尺度上的空间和时间分布信息是土壤学、农学和水文学等许多学科进行科学研究的基础，对农业发展和水文监测等具有重要意义。因此，发展科学依据充分的适
土壤风化和形成过程是了解土壤与环境之间相互作用与反馈的基础。本研究以我国亚热带典型地区不同利用条件下的3个相邻小流域(F、FA1、FA2)为研究区域，2007年2月～2010年2月通过
本研究采取北京山地黑桦林、刺槐林、板栗林、槲树林及山杨-白桦林等阔叶林型下,人工油松林、白皮松林、天然油松林、落叶松林及侧柏林等针叶林型与荆条灌木林型下0～0.2 m、0.
Soft robotics with new designs,fabrication technologies and control strategies inspired by nature have been totally changing our view on robotics.To fully explo
Major evolutionary transitions are enigmas,and the most notable enigma is between invertebrates and vertebrates,with numerous spectacular innovations.To search
铝（Al）在土壤中通常以硅酸盐等形式存在，对作物生长的影响较小，但土壤pH≤5.0时，Al3+、Al(OH)2+、Al(OH)2+等可溶态活性铝就会大量溶出，即使是微摩尔级(10μM）Al3+处理也可以迅速抑
Multiferroic nanostructures have been attracting tremendous attention over the past decade, due to their rich cross-coupling effects and prospective electronic
The microRNA miR396 directly represses GROWTH-REGULATING FACTORs (OsGRFs) and has been implicated in regulating rice yield and in nitrogen assimilation.Overexpr
以三江平原白浆土为研究对象，采用室内培养、田间小区微区同位素示踪技术相结合的方法，研究了脲酶抑制剂NBPT与硝化抑制剂DMPP在白浆土中尿氮素转化、土壤酶活性及微生物量碳氮