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苹果轮纹病菌拮抗细菌R8菌株水分散粒剂的研制 总被引:1,自引:0,他引:1
通过对润湿剂、分散剂、悬浮剂、崩解剂、黏结剂、稳定剂及载体的筛选,确定苹果轮纹痛菌拮抗细菌R8菌株水分散粒剂的最佳配方为桔抗细菌1×1010cfu·g-1、十二烷基苯磺酸钠4.0%、木质素磺酸钠8.0%、丙烯酸胺和丙烯酸酯的共聚物1.0%、尿素3.0%、聚乙二醇2.0%、磷酸氢二钾3.0%,填料硅藻土与膨润土按质量比4:1加至100%,所得制剂悬浮率为76%,润湿时间52 s,崩解时间108 s,(54±2)℃、14 d后的热贮稳定性合格.各项指标均符合水分散粒剂质量标准的要求. 相似文献
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25%阿米西达水悬浮剂防治葡萄霜霉病试验 总被引:8,自引:1,他引:8
阿米西达(Amistar)是近年商品化的农用杀菌剂新品种,该药为甲氧基丙烯酸酯类杀菌剂,有效成分嘧菌酯,是一种广谱性杀菌剂,源于热带雨林一种食用蘑菇产生的天然抗菌物质Strobilurin,适宜在无公害农产品生产中应用.我们曾于2001年用该药进行过防治葡萄霜霉病试验,看出阿米西达用于对葡萄霜霉病的防治不仅有保护作用,而且有较好的治疗作用.为了进一步明确该药对葡萄霜霉病的防治效果,我们于2004年和2005年又对该药进行了田间药效试验,并以生产上常用药剂三乙膦酸铝和代森锰锌为对照药剂进行比较,以明确阿米西达防治葡萄霜霉病的药效. 相似文献
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草茎点霉Phoma herbarum SYAU-06菌株分离自罹病的鸭跖草叶片,可高度侵染鸭跖草导致其死亡,但对大多数农作物安全,具有开发成真菌除草剂的潜能。通过载体和助剂与草茎点霉生物相容性研究,在确保载体和助剂对菌株SYAU-06安全的基础上,比较了各种助剂及其不同用量下的理化性能,确定了草茎点霉SYAU-06水分散粒剂 (WG) 最佳配方 (质量分数) 为:草茎点霉SYAU-06发酵菌丝体15%,润湿剂拉开粉 (BX) 6%,分散剂亚甲基双萘磺酸钠 (NNO) 4%,崩解剂硫酸铵6%,黏结剂聚乙二醇 (PEG 4000) 4%,稳定剂碳酸钙5%,载体白炭黑60%。由此配方制备的草茎点霉WG各项指标均合格,其活菌含量为2.55 × 108 cfu/g,润湿时间28.16 s,崩解时间70.50 s,悬浮率88.90%,pH值6.97,含水量1.47%。采用茎叶喷雾法测定了所制备草茎点霉WG对大豆田鸭跖草的田间防效。分别以制剂用量1305、1740、2175 和3480 g/hm2 的剂量茎叶喷雾施药3次,21 d后鲜重防效分别为50.89%、55.97%、60.67%和69.88%。 相似文献
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引起河北省保定市白术根腐病的病原镰刀菌种类鉴定 总被引:1,自引:0,他引:1
In order to identify the pathogenic fungi of Atractylodes macrocephala root rot in Baoding, Hebei Province, eighty strains of Fusarium species were isolated from 120 A. macrocephala plants with root rot symptoms with the isolation frequency at 66.7%. Fusarium species were identified by molecular techniques with specific primers, TEF-1α gene sequencing together with morphological characteristics. Thirty-nine F. solani strains were identified with the highest percentage at 48.8%, and 32 F. oxysporum strains were isolated with the percentage at 40.0%. Seven F. equiseti and two F. brachygibbosum strains accounted for 8.8% and 2.5%, respectively. The pathogenicity test on A. macrocephala showed that F. solani and F. oxysporum caused the typical symptoms of root rot. Koch's postulates were fulfilled following re-isolation and identification of the isolates of F. solani and F. oxysporum. Taken together, the results showed that F. solani and F. oxysporum were the pathogens of A. macrocephala root rot in Baoding, Hebei Province. 相似文献