共查询到20条相似文献,搜索用时 781 毫秒
1.
2.
蜂螨寄生虫病的防治是现在养蜂生产的关键环节。养蜂人有句俗语 :“治不了螨 ,养不好蜂” ,养蜂人员对蜂螨的治疗 ,因时因地总结了很多治疗的方法、措施。尽管如此 ,螨害一年强于一年 ,甚至表现得更加顽固。但就目前养蜂生产而言 ,既要考虑蜂群的发展壮大 ,又需注重蜂产品的质量 ,提高蜂产品的信誉度 ,所以对以前滥用治螨药物的行为要有所反思。1 按蜜蜂和蜂螨的周年生长规律 ,控制螨害 蜂螨周年生活规律十分明显 ,蜂螨在蜂群中的生长繁殖依赖于蜂群的生长繁殖 ,蜂螨在封盖子房里繁殖 ,寄生在蜜蜂体上吸食体液生活。大小蜂螨对蜜蜂各虫态都… 相似文献
3.
养蜂人都知道 ,大小蜂螨是西方蜜蜂生长繁殖的一大敌害。蜂螨危害严重时 ,蜂群灭亡 ,蜂产品无收。笔者经过几十年养蜂和防治蜂螨的实践 ,总结出了采用全年只用 3天治螨的方法 ,效果良好 ,能将蜂螨全年在蜂群中的寄生密度和对蜂群的危害程度降到最低 ,有兴趣的蜂友不妨一试。经笔者多年观察 ,蜂螨从早春蜜蜂开始产卵繁殖便同步进行繁殖。在我地七八月份蜜源断绝、气温最高、蜂群繁殖下降时 ,蜂螨寄生率和危害程度最高 ,此时如不及时防治 ,蜂群越夏后发生秋衰 ,秋繁时难以复壮 ,初冬时由于蜂少不能安全越冬 ,严重的全群灭亡 ,这是蜂螨在蜂群中… 相似文献
4.
5.
蜂螨繁殖抑制基因——对付蜂螨的新武器 总被引:2,自引:0,他引:2
雅氏瓦螨 (Varroajacobsoni)是近年来国内外养蜂研究的一大热点 ,研究内容涉及蜂螨生物学、蜂螨繁殖、影响蜂螨种群增长的因素、蜂螨不同地理种群的关系以及蜂螨防治技术。最近国外在通过影响蜂螨繁殖以达到最终控制蜂螨种群增长方面取得可喜成绩。在路易斯安那州 ,美国农业部实验室工作的Har bo博士和Harris博士不久前成功地提出了控制蜂螨的有效方法———蜂螨生长抑制方案 (SMR)。养蜂者只需把带有抑制蜂螨繁殖基因的蜂王介绍到蜂群中 ,等基因扩散后 ,选出生产性能最好、抗螨能力最强的蜂群即可达到控制蜂… 相似文献
6.
蜂螨仍然是我国当前养蜂生产上传播最广、危害最大的蜜蜂敌害。在欧美各国的蜂群里只有大蜂螨,而我国的西方蜜蜂群里不仅有大蜂螨,还有小蜂螨,这两种蜂螨的形态、习性和活动能力等生物学特性有很大的差异,却可以在同一个西方蜜蜂封盖幼虫房里共同寄生繁殖,这是我国养蜂生产上螨害严重、防治困难的根本原因。此外,由于现有的杀螨药剂品种少,常年使用同一种杀螨药剂,增强了蜂螨的抗药性等等原因,使得我国养蜂生产上螨害不断,染螨蜂群遍布全 相似文献
7.
8.
9.
利用生物方法防治蜂螨的措施及效果研究 总被引:1,自引:0,他引:1
固原地区主要有2种蜂螨危害,即大蜂螨和小蜂螨,尤以大蜂螨危害为重,每年自蜂群定地越冬后于5月初蜂王开始产卵乃至9月底都有发生,单一、大量用药防治既易污染蜂产品 ,又给蜂群发展带来副作用,利用生物方法防治蜂螨,同时用药物辅助治疗,防治效果达到95 %以上,且不易造成蜂产品的污染,一举两得,值得在养蜂生产中推广应用。 相似文献
10.
我在海南养蜂数年,经常看到很多蜂场因蜂螨危害而全场覆没,或是蜂群不能正常繁殖,错过流蜜期,取不到蜜.在海南,四季花期不断,蜂群没有自然断子过程,所以大蜂螨、小蜂螨的危害极为严重.常规的蜂螨防治是在越夏后期人为扣王,让蜂群于9月上旬断子,在蜂群断子前后各喷2次杀螨药,隔1天1次.这是一年中最彻底的一次治螨,很多蜂农按步就搬,他们没有考虑到蜂螨的抗药性和蜂药的药效,击落的蜂螨复苏,重新危害蜂群.经过多年观察以及3年的针对性实践,我总结出一套有效的治螨方法,具体操作如下: 相似文献
11.
Beran GW 《Preventive veterinary medicine》2008,86(3-4):198-207
When early people made their appearance, zoonotic infectious diseases were already waiting, but epidemic diseases did not appear in human history until people began to live in large numbers under conditions of close contact, mainly during the last 10,000 years. Disease has decimated urban populations, conquered armies, and disrupted society. The focus here is on (1) the plague of Athens and the Black Death; (2) smallpox, influenza, and rabies; (3) avian influenza prion diseases, and foot & mouth disease; and (4) emerging and re-emerging diseases. All have veterinary public health associations. In Athens, Greece, in 430 BC, when the Spartans ravaged the countryside, hordes crowded into Athens so that orderly movements, space in which to live, and adequate supplies of food became impossible. Crowding of any population fosters disease transmission; chaos and disorder enhance it all the more. Out of northern Egypt came a terrible plague from across the Mediterranean Sea. The identity of the plague of Athens remains unsure, but the well-considered conclusion is Rift Valley Fever, a mosquito borne, viral zoonosis. The Black Death, also called the Plague, raged in Asia for centuries. In 1347, the Black Death was brought by a ship out of Asia to Sicily. The scenes of devastation were repeated throughout Europe, with 90% or more of the people dying in city after city. Influenza, too, has been a cause of periodic human epidemics, but the great pandemic of influenza occurred in the last months of World War I. In the years of highest occurrence, more than half the world's population became clinically infected. If veterinary public health had been born earlier, it could have led to elucidating the epidemiology of influenza and the plagues of Athens, Europe, and Asia. In turn, smallpox had also caused continual tragedy. In 1796, Edward Jenner began to harvest pustules of cowpox from children or infected cows and inject them into susceptible children. In 1980, the World Health Organization declared that smallpox had been eliminated from the world. Rabies, though, still strikes terror. A number of animal diseases, broadly termed emerging and re-emerging diseases, need surveillance because they have the potential to impact human health. From late in 2003 to 2007, the highly pathogenic H5N1 influenza virus in poultry infected at least 121 people and caused 62 deaths in four countries. The prion diseases, too, all have very high numbers in concentrated contacts. To control these diseases, veterinary public health is essential, with diagnosis, epidemiological surveillance, clinical manifestations, and prevention as primary measures. 相似文献
12.
13.
Dekker A Dercksen D Snoep J van Wuyjckhuise L 《Tijdschrift voor diergeneeskunde》2007,132(18):695-701
On 26th of july 2007 a new case of bluetongue was notified in the Netherlands and on 2nd of august 2007 foot-and-mouth disease was diagnosed in Surrey, England, which raised the threat of having both infections simultaniously in one area. Bluetongue and foot-and-mouth disease have a different pathogenesis, but symptoms may resemble each other at a later stage of infection. The pathogenesis and possible clinical symptoms of both infections are discussed and illustrated with pictures. 相似文献
14.
15.
在动物的异常行为中以刻板行为最为常见,而咽气癖又是马最常见的口部刻板行为之一。作者就咽气癖在生理方面和心智方面对马体产生的影响、行为基础、诱因的研究进展及常见的防治措施进行综述。 相似文献
16.
17.
18.
近几年,世界饲用添加剂市场增长较快,预计今后将进一步增长,据世界粮农组织(FAO)首领会议的倡议,到2015年,将使世界营养不良的人口削减一半,其间,肉制品将会以每年2%的速度增长,特别是加快猪肉和禽肉增长。这将促进世界添加剂,尤其是蛋氨酸和赖氨酸需求量的增加。 相似文献
19.
20.