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黄鳝,又名鳝鱼,其肉味鲜美,营养价值高,在市场上很受消费者的欢迎,人工养殖已初具规模,但随之而来的则是病害的出现,其病害防治中化学药物的大量使用,一是易导致病原(尤其是细菌性病原体)产生抗药性而影响疗效,二是有些化学药物(如氯霉素、孔雀石绿等)易在鳝体内残留而影响人体健康,三是使用某些化学药物而导致水体环境的污染等.中草药是一种理想的天然环保型绿色药物,具有天然、高效、毒副作用小、安全性高、残留量小等诸多优点,且来源厂、成本低,对鳝病防治效果较为显著.现介绍几种鳝病使用中草药防治的方法. 相似文献
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斑喙丽金龟Adoretus ternuimaculatus Waterhouse又名茶色金龟子。我国大多数省(区)有分布。除为害茶树外,还为害油茶、棉、玉米、高粱、豆类、樱桃、苹果、杏、梧桐、枫杨、柳等多种作物和果木。在婺源常见与中喙丽金龟Adoretus sinicusBurmeistes混合发生,且成虫栖息为害较集中,一丛茶树常聚集有数百头成虫在上取食,晚上观察时可听见“嗡、嗡……”的飞行声。国内此虫为害茶的报道甚少,为此,笔者对其作了初步观察。现作一介绍。1形态特征成虫体长9.5~10.5mm,宽4.7~5.3mm,褐或棕褐色,腹部色泽较深。体密被乳白披针形鳞片,光泽较暗淡。… 相似文献
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不同茶树品种对茶芽粗腿象的抗性测定 总被引:1,自引:0,他引:1
茶芽粗腿象(Ochyromera quadrimaculata Voss)是江西省春茶期发生的一种重要茶叶害虫之一。鉴于茶树品种对该虫的抗性迄今未见报道,为此我们对其进行了初步研究,现报道如下。 相似文献
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In recent years since 2018, the disease of tomato fruit rot has been often noted in Jiangxi province. In order to ascertain the causal agent, common tissue isolation method was used to isolate the pathogen collected from 8 counties and cities of Jiangxi province. A total of 17 isolates was obtained, which exhibited similar phenotype on V8 agar plates with production of antheridia, oogonia and oospore indicating the characteristics of Phytophthora spp.. The pathogenicity test for the isolates showed the similar disease symptoms with that in the field and the pathogen was reisolated from the infected tomato tissues, which fulfilled the Koch’s postulate. BLAST search with rDNA-ITS, partial Ypt1 and β-tubulin gene sequences for 17 isolates showed 99%-100% of identities to Phytophthora capsici that in correspond with the clustering result of phylogenetic analysis for two represented strains. Combined with morphologic characteristic observation, pathogenicity test and sequence ana-lysis, the pathogen causing tomato fruit rot was identified as Phytophthora capsici. This is the first report of P. capsici causing fruit rot on tomato in Jiangxi province, China. 相似文献
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