共查询到20条相似文献,搜索用时 171 毫秒
1.
2.
<正>百蔸虫量在1000~2000头以内的田块,应当在低龄若虫期(三龄以下)每亩用25%扑虱灵(噻嗪酮)可湿性粉剂45~50克或10%吡虫啉可湿性粉剂15~20克对水50公斤 相似文献
3.
<正>将作用机理和杀虫速度不同的药剂混配或复配使用,可以提高对稻飞虱的防治效果,延缓抗药性产生。广西合浦县植保植检站于2007年9月对多种用于防治稻飞虱的药剂进行了田间试验。分别每亩用10%吡虫啉·噻嗪酮可湿性粉剂50克(A处理)、25%噻嗪酮·杀虫单可湿性粉 相似文献
4.
5.
6.
为研究三苯基乙酸锡可湿性粉剂对甜菜褐斑病的防治效果,2011年,分别采用不同剂量的25%三苯基乙酸锡可湿性粉剂进行防治试验,分别于施药后7、14 d调查防效,比较不同处理的防治效果。结果显示,25%三苯基乙酸锡对甜菜安全,对甜菜褐斑病的防治效果持久且稳定,各处理的防治效果均优于对照药剂40%多菌灵悬浮剂。25%三苯基乙酸锡可湿性粉剂对甜菜褐斑病防治效果明显,用药剂量以400~420 g/667 m2为宜。 相似文献
7.
8.
9.
本刊讯随着25%吡蚜·噻嗪酮悬浮剂、50%吡蚜·噻嗪酮水分散粒剂、50%吡蚜酮水分散粒剂的成功开发和入市,江苏安邦电化有限公司已拥有包括飞电(25%吡蚜酮可湿性粉剂)及吡蚜酮原药在内的五个吡蚜酮产品,是拥有吡蚜酮登记品种最多的国内企业。 相似文献
10.
据《农药电子手册》,目前登记用于稻曲病防治的药剂中,单剂有络氨铜、琥珀胶肥酸铜、松脂酸铜等铜制剂,三苯基乙酸锡等锡制剂,己唑醇、三唑醇等唑类杀菌剂;复配剂有井冈霉素与蜡质芽孢杆菌(10%井·蜡芽悬浮剂)、三唑酮(15.5%井·酮可湿性粉剂)、烯唑醇(12%井·烯唑可湿性粉剂)、腈菌唑(8.5%腈菌·井可湿性粉剂)、氧化亚铜(42%井·氧化亚铜可湿性粉剂)的复配剂,三唑酮与多菌灵(40%多菌灵·三唑酮可湿性粉剂)、三苯基乙酸锡(20%苯乙锡·酮可湿性粉剂)、氧化亚铜(28%酮·氧亚铜可湿性粉剂)的复配剂等。其中井冈霉素与蜡质芽孢杆菌的复配剂为纯… 相似文献
11.
12.
13.
14.
中国牧草育种工作研究进展 总被引:4,自引:0,他引:4
在综述中国牧草育种工作进展的同时,分析了牧草育种工作中存在的问题,主要包括育成的牧草品种少,良种推广和覆盖面积较小以及牧草育种理论基础薄弱等,并针对性地提出应从改进牧草育种的方法和途径、培育具有地方特色的独特牧草品种、加强种质资源的保护与利用、加快良种向现实生产力的转化以及通过各部门协作攻关等方面解决这些问题。 相似文献
15.
兰花试管开花研究进展 总被引:3,自引:1,他引:2
对兰花试管开花方面的研究进行了综述,着重介绍了兰科植物试管开花的影响因素及其调控和分子机理等方面的研究情况,指出目前存在的若干问题并提出解决对策。 相似文献
16.
中国稻草还田技术研究进展 总被引:5,自引:2,他引:3
随着中国农业的发展,大量稻草被焚烧或者弃置,这不仅浪费了养分资源还造成环境污染。本文综述了稻草还田的方式方法,稻草还田对土壤性状及水稻产量的影响以及稻草还田对水稻氮素吸收和氮肥利用率的影响,以期待稻草还田技术可以进一步推广应用。 相似文献
17.
Twenty two Uromyces appendiculatus isolates were tested on 20 differential and 25 Ecuadorian Phaseolus vulgaris cultivars in the seedling stage. Based on the infection types 20 races could be discerned. The Ecuadorian cultivars differed
greatly in their reaction to the isolates, from resistant to only one isolate (`Red Small Garden') to resistant to all isolates
(’G2333‘). The isolates showed a wide range of virulence to the Ecuadorian cultivars, from virulent to only two cultivars
(isolate 13) to virulent to 21 cultivars (isolates 5 and 23).
Seven cultivars with a basically susceptible infection type appeared to differ greatly in quantitative resistance when tested
in three consecutive crop cycles. The disease severities in percentage leaf area affected averaged over the three cycles ranged
between 83.9% for ‘Red Small Garden’ and 13.1% for ‘INIAP-414’.
Race-specific resistance does not seem an advisable breeding strategy, but the quantitative resistance offers a good alternative. 相似文献
18.
19.
低温胁迫是限制植物生长发育和地理分布最主要的环境因子之一,影响植物细胞膜系统、抗氧化系统、光合作用、次生代谢等诸多方面,对农业生产和发展有严重影响。因此,揭示作物在冷胁迫下的生理及分子机制是十分必要的,这有助于培育耐寒作物品种,从而减少生产损失,扩大作物种植面积,具有重要的生产价值和经济效益。目前,基于RNA-seq技术进行植物低温胁迫分子机制深度解析在拟南芥、水稻、油菜、茶树、小麦、烟草、高粱等重要作物上得到了发展应用。本研究综述了近年来植物在低温胁迫或低温适应过程中的转录组学研究现状,以期为高通量测序技术在植物抗性研究方面提供方法借鉴和理论基础。 相似文献
20.
Toshihiro Saito 《Breeding Science》2016,66(1):46-59
The Japanese pear (Pyrus pyrifolia Nakai) is one of the most widely grown fruit trees in Japan, and it has been used throughout Japan’s history. The commercial production of pears increased rapidly with the successive discoveries of the chance seedling cultivars ‘Chojuro’ and ‘Nijisseiki’ around 1890, and the development of new cultivars has continued since 1915. The late-maturing, leading cultivars ‘Niitaka’ and ‘Shinko’ were released during the initial breeding stage. Furthermore, systematic breeding by the Horticultural Research Station (currently, NARO Institute of Fruit Tree Science, National Agriculture and Food Research Organization (NIFTS)) began in 1935, which mainly aimed to improve fruit quality by focusing on flesh texture and black spot disease resistance. To date, 22 cultivars have been released, including ‘Kosui’, ‘Hosui’, and ‘Akizuki’, which are current leading cultivars from the breeding program. Four induced mutant cultivars induced by gamma irradiation, which exhibit some resistance to black spot disease, were released from the Institute of Radiation Breeding. Among these cultivars, ‘Gold Nijisseiki’ has become a leading cultivar. Moreover, ‘Nansui’ from the Nagano prefectural institute breeding program was released, and it has also become a leading cultivar. Current breeding objectives at NIFTS mainly combine superior fruit quality with traits related to labor and cost reduction, multiple disease resistance, or self-compatibility. Regarding future breeding, marker-assisted selection for each trait, QTL analyses, genome-wide association studies, and genomic selection analyses are currently in progress. 相似文献